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A novel Sm [CHA (PEG)] polymer light conversion agent was synthesized by preparing the polymer ligand CHA (PEG) with cyanuric chloride crosslinked polyethylene glycol, 8-hydroxyquinoline, and lauryl alcohol, and carrying out coordination reaction with Sm3+. FTIR, XPS, XRD, fluorescence spectroscopy, UV, TGA, and other testing methods were used to analyze the chemical structure, fluorescence properties, and thermal stability of Sm[CHA(PEG)]. The results show that the UV absorption of Sm[CHA(PEG)] polymer light conversion agent showed broadband absorption at 320~400 nm, and the optimum peak of its fluorescence excitation peak is located at 362 nm, which is in agreement; the positions of fluorescence emission peaks is at 566 nm,614 nm, and 645 nm, among which the emission peak at 645 nm has the highest intensity, which is suitable for the absorption spectra of photosynthesis of plants in the red-light region. The intensity of the emission peak at 645 nm is the highest, which matches the absorption spectrum of photosynthesis in the red light region. The heat loss curve shows that the decomposition temperature of the light conversion agent is 281 °C, and the thermal stability is good. In summary, the synthesized Sm[CHA(PEG)] polymer light conversion agent has excellent optical and thermal properties, and it has great application prospect in the field of agricultural film. [ABSTRACT FROM AUTHOR]

Dithieno[3,2‐b:2',3'‐d]thiophene (DTT) derivative contains three annulated thiophene rings, which have attracted great attention in the field of materials due to its planar and conjugated molecular, structural rigidity, and increased solubility. Herein, the one‐step modular construction of a series of structurally well‐defined 2,6‐disubstituted dithieno[3,2‐b:2',3'‐d]thiophenes (2,6‐DTT) involves Pd/Cu(I)‐catalyzed Sonogashira coupling and LiNH2‐mediated ring‐closing reaction with element sulfur was reported. The method allows the selective and straightforward introduction of different aryl substitution into DTT without otherwise tedious separation and purification processes. The preliminary study of the thermal and photophysical properties demonstrated that the introduction of substituent in phenyl has great impact for the parent molecule, which enable this protocol to synthesis high‐performance 2,6‐DTT through the different alkynes. [ABSTRACT FROM AUTHOR]

Copyright of Journal of the Chinese Society of Rare Earths is the property of Editorial Department of Journal of the Chinese Society of Rare Earths and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present study explores the synthesis and bio-safety evaluation of gadolinium-doped carbon quantum dots (GCQDs) as a potential dual-contrast agent for diagnostic imaging. GCQDs exhibit both fluorescent and magnetic properties, making them suitable for UV–Vis and magnetic resonance imaging (MRI). The synthesis of GCQDs was achieved via hydrothermal treatment, incorporating gadolinium into the carbon quantum dot matrix. The magnetic properties of GCQDs were analyzed, showing significantly enhanced values compared to gadobutrol, a common MRI contrast agent. However, synthesis constraints limit the gadolinium content achievable in nanodots. To assess the safety of GCQDs, their effects on the embryonic development of zebrafish (Danio rerio) were examined. Various concentrations of GCQDs were tested, observing mortality rates, hatchability, malformations, heartbeats, spontaneous movement, and GCQDs uptake. Dialysis studies indicated that gadolinium ions are incorporated into the internal structure of the carbon nanodots. Zebrafish toxicity tests revealed that while survival rates were comparable to control groups, hatchability decreased significantly with higher gadolinium concentrations in GCQDs. Fluorescence microscopy showed no statistical differences in the fluorescence intensity between groups. These findings suggest that GCQDs could serve as an effective dual-contrast agent, combining the optical imaging capabilities of CQDs with the enhanced MRI contrast provided by gadolinium. This study underscores the need for further research on the synthesis methods and biological interactions of GCQDs to ensure their safety and efficacy in medical applications. [ABSTRACT FROM AUTHOR]

Thiolate-protected atomically precise nanoclusters (NCs) demonstrate a series of unique luminescent characteristics attributed to their various peculiar electronic structures. Therefore, fluorescent NCs present extraordinary practical values in biosensing and bioimaging research fields. Nevertheless, restricted by the types of fluorescent NCs, there are great difficulties in promoting the development of NCs in fluorescent research areas. As a result, it is of significant necessity for researchers to develop new synthetic pathways to produce high-quality fluorescent NCs. According to the analysis about the structural characteristics of fluorescent NCs, some general features like longer motif and higher ligand-to-metal ratio can be found, consistent to some presented regularities in etching reaction. Consequently, in this work, we used Au25(MHA)18 (MHA = 6-mercaptohexanoic acid) as a model nanocluster and utilized the etching reaction to systematically explore etching products and their corresponding luminescent properties. Moreover, we also identified three main reaction processes in the entire etching reaction process, which can generate new metal nanocluster species with various fluorescent properties. Hence, the etching reaction will provide a good platform to produce new luminescent metal NC species. [ABSTRACT FROM AUTHOR]

A pyridine-fused triazapentalene shows weak fluorescence in solution and is readily accessible via nitrene-mediated cyclization. In this study, a modified Cadogan reaction was used to synthesize HetATAP 1. Palladium-catalyzed reactions have been used as post-functionalization methods. Interestingly, modified Suzuki cross-couplings with various boronic acids resulted in poor to moderate yields of HetATAPs 2–5 which were arylated at the azole moiety. Direct CH arylation of HetATAP 1 gave the products with the same regiochemistry in satisfactory yields. The structures of HetATAPs 2–5 were confirmed using NMR analysis. In addition, the photophysical properties of HetATAPs 1–5 were studied under various conditions. Particularly, the emission of HetATAPs 2–5 is enhanced in the solid and aggregate state.

New 2-(4-(fluorosulfonyloxy)phenyl)benzoxazole (2) was synthesized through the SuFEx click reaction in a two-chamber reactor. The effect of silylation on the yield of the target compound was investigated. The fluorescent properties of compound 2 were determined using experimental and computational methods. [ABSTRACT FROM AUTHOR]

A new zinc(II) metal organic framework has been obtained from the solvothermal assembly of 1,3,5-benzene tricarboxylate and 1,3-bis(imidazole)propane with zinc nitrate in DMAc–H2O (DMAc is N,N -dimethylacetamide), namely {[Zn2 (μ2-OH)(1,3-BIP)(BTC)]·DMAc·2H2O}n (SNUT-6). The product is characterized by single-crystal and powder X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and elemental analysis. The single-crystal X-ray diffraction reveals that SNUT-6 exhibits a 3D→3D two-fold interpenetrating framework. Furthermore, SNUT-6 demonstrates a highly efficient turn-off fluorescent detection ability for aniline in methanol and shows high sensitivity with a K sv value of 4.771 × 104 M−1. It also shows excellent photocatalytic degradation performance for a three-dye molecular model: rhodamine b, methyl orange, and methyl blue. [ABSTRACT FROM AUTHOR]

Five new lanthanide complexes were synthesized using 5,5′ -dimethyl-2,2′ bipyridine(5,5′-DM-2,2′-bipy) and 3-Dimethylaminobenzoic acid(3-N,N-DMHBA) as ligands, and all five lanthanide complexes were found to be dimeric by single crystal X-ray diffraction. The general chemical formula is [Ln(3-N,N-DMBA)3(5,5′-DM-2,2′-bipy)]2·2(3-N,N-DMHBA), Ln=(La(1), Pr(2), Dy(3), Eu(4)), [Ln(3-N,N-DMBA)3(5,5′-DM-2,2′-bipy)]2, Ln=(Sm(5)). 3-N,N-DMBA = 3-Dimethylaminobenzoate. DTG-DSC/FTIR coupling technique was used to examine the thermal decomposition mechanism of the five lanthanide complexes, and the fluorescence properties of complexes 3, 4 and 5 were also measured. The fluorescence lifetime of complex 4 was 0.6941(3) ms. The mono- and trimorphic states of the ligand were calculated by DFT. The mechanism of luminescence of the complexes was explained from the point of view of energy transfer.

Carbon dots (CDs), a novel type of nanomaterial, play crucial roles in the agriculture field. However, it remains unclear their impacts on the flavor quality of vegetables. The present study synthesized a novel chitooligosaccharide-peanut oligopeptide-carbon dots (COS-POP-CDs) material through the chitooligosaccharide (COS) and peanut oligopeptide (POP) high temperature Maillard reactions and studied its effect on the flavor quality of Chinese cabbage (Choy sum). Results indicated that COS-POP-CDs emit blue visible light that readily absorbed by chloroplasts, while also demonstrating some degree of antibacterial and antioxidant activities. After transplanting of Choy sum, foliar spraying 0.12 mg/mL COS-POP-CDs twice can increase the content of soluble proteins, Vitamin C, and enhance the strawberry and spicy flavors of Choy Sum. After harvest of Choy Sum, foliar spraying 0.12 mg/mL COS-POP-CDs once can slow down the spoilage. These results suggest that COS-POP-CDs have significant potential to improve crop quality.

The reaction of the N,N-diethyl-N'-(p-nitrobenzoyl)thiourea with K2[PtCl4] results in the complex of configurational cis-[Pt(L-kS,O)2], and structurally characterized by elemental analyses, FT-IR, 1H NMR, 13H NMR, UV–Vis spectroscopy, and cis-[Pt(L-kS,O)2] complex have been also characterized by a single-crystal X-ray diffraction study. The cis-[Pt(L-kS,O)2] crystallizes in the monoclinic crystal system, space group P21/c, with Z = 4, and unit cell parameters, a = 15.09299(15) Å, b = 15.26600(14) Å, c = 14.39268(14) Å, α = 90°, β = 107.6347(11)° and γ = 90°. The single-crystal diffraction analysis of the complex shows that the molecular configuration of cis-[Pt(L-kS,O)2] is a slightly distorted square-planar geometry, and both deprotonated ligands (L) contribute one O atom and one S atom coordinate with a central Pt(II) ion. The intermolecular interactions in the cis-[Pt(L-kS,O)2] complex were analyzed using the Hirshfeld surface method, including 2D fingerprint plots. In addition, the fluorescence properties of the compounds at room temperature were also studied. The results show that both ligands and complexes have good fluorescence properties, and the fluorescence intensity of the coordination compound enhances. In this paper, single-crystal X-ray analysis shows cis-[Pt(L-kS,O)2] belongs to monoclinic crystal system, space group P21/c. The connectivity of the ligand to the metal as 2:1 and the platinum atom is coordinated with two N,N-diethyl-N'-(p-nitrobenzoyl)thiourea ligands in a distorted square-planar geometry. [ABSTRACT FROM AUTHOR]

Fluorescent dyes can apply to prepare some high-visibility materials for safety garments. Reactive dyes have advantages, such as brilliant shades, suitable wet-fastness properties, and high daylight visibility. In this respect, we reported the dyeing properties of two synthesized fluorescent reactive dyes, namely mono-functional (D1) and bifunctional (D2), on cotton fabrics. The cotton fabrics were dyed in various concentrations of D1 and D2 at 80°C and 60°C, respectively. Results represented that D1 and D2 had good exhaustion on cotton fabrics with suitable fixation percentages. The experimental data of the dyeing of cotton fabrics with the used dyes were analyzed by the Langmuir, Freundlich, Temkin, and B.E.T isotherm models. The kinetic data were checked by pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion kinetic models. The results indicated that the isotherm and kinetic adsorption of dyes on cotton fabrics were fitted by the Freundlich isotherm and pseudo-second-order kinetic model. The dyed cotton fabrics had relatively medium light fastness (3–4) and good rubbing and washing fastness (4–5). The investigation of color characteristics and fluorescent properties of dyed cotton fabrics with fluorescent dyes showed that the reactive dyes had a yellow hue on cotton fabrics with good fluorescence intensity in concentration 5% o.w.f.

In this study, a new approach for the synthesis of substituted aza-anthraquinones has been developed. The SnCl2 catalyzed reaction of 2-amino-4H-chromen-4-one with 2-benzylidenemalononitriles provides the corresponding substituted aza-anthraquinone analogs via a Michael addition–elimination followed by intramolecular cyclization in good to excellent yields under mild reaction conditions. Furthermore, the synthesized compounds 3a–3l were analyzed for their preliminary photo physical properties (absorption and emission spectra) in CHCl3 at 100 μM. Among the compounds (3a–3l), the compounds 3c and 3b exhibited larger emission band maxima toward bathochromic shifts at 488 nm and 468 nm, respectively. [ABSTRACT FROM AUTHOR]

• Two Multifunctional Ln 2 compounds have been synthesized and structurally characterized. • The Dy 2 compound 2 shows remarkable single-molecule magnet behavior under zero-field. • Fluorescent properties researches show that the two Ln 2 compounds display the characteristic Ln3+ ions luminescence at room temperature. • Biological activities research reveals that compounds 1 and 2 have greater antibacterial activity than the ligand H 2 L and rare-earth salts. • The interaction between compounds 1 and 2 and calf thymus DNA was studied. The efficient design and reasonable construction of multifunctional Ln(III)-based compounds with fascinating structures have always attracted great concern, and it is also an immense challenge in recent times for chemists and materials scientists. Herein, two new binuclear Ln(III)-based compounds with molecular formula [Ln 2 L 2 (dbm) 2 (CH 3 OH) 2 ]·xCH 3 OH·yCHCl 3 (LnIII = Tb (1), x =2, y = 0; LnIII = Dy (2), x =0, y = 2; H 2 L = (E)-N'-(5-bromo-2-hydroxy-3-methoxybenzylidene)nicotinohydrazide; and Hdbm = 1,3-diphenyl-1,3-propanedione) have been constructed by a polydentate Schiff base ligand (H 2 L) via solvothermal method. The structures, magnet behaviors, and biological activities of compounds 1 and 2 have been studied systematically. Structure studies suggest that the two Ln 2 compounds 1 and 2 are isostructural and possess butterfly-shaped molecular structures. Magnetic studies exhibit that Dy 2 compound 2 shows remarkable single-molecule magnet behavior under zero-field conditions with U eff / k B = 55.91 K and τ 0 = 4.02×10−7 s. Moreover, solid-state fluorescent properties research shows that the two Ln 2 compounds display the characteristic Tb3+ and Dy3+ ions luminescence at room temperature. Furthermore, biological activities research reveal that the two Ln 2 compounds have better antibacterial activities against four common types of bacteria (Escherichia coli, Staphylococcus aureus, Candida albicans, and Bacillus subtilis) than the polydentate Schiff base ligand (H 2 L) and β-diketo salts Ln(dbm) 3 ⋅2H 2 O (Ln(III) = TbIII and DyIII). The interaction between Ln 2 compounds (1 and 2) and calf thymus DNA have also been studied, and the result reveal that both Tb 2 and Dy 2 compounds were mainly intercalated with calf thymus DNA. To our knowledge, compounds 1 and 2 are rarely reported multifunctional Ln(III)-based compounds owning single-molecule magnet behavior, fluorescent properties, and biological activities simultaneously. Two novel multifunctional Ln 2 compounds with butterfly-shaped structures were constructed showing remarkable Single-Molecule Magnet behavior, and biological activity. [Display omitted] [ABSTRACT FROM AUTHOR]

Copyright of Journal of Natural Fibers is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A convenient method for the synthesis of the second generation of PAMAM dendrimers based on a p-tert-butylthiacalix[4]arene core in cone, partial cone and 1,3-alternate conformations was developed. Unusual fluorescence of the obtained PAMAM-calix-dendrimers has been found and explained. The binding ability of the synthesized dendrimers toward catecholamines (dopamine, L-adrenaline and L-noradrenaline) was shown by UV-Vis, fluorescence, 1D and 2D NMR spectroscopy and the binding constants (logKa 3.85–4.74) calculated. As was shown, the PAMAM-calix-dendrimers bind catecholamines by the internal cavities. All the studied hormones were most efficiently bound by the dendrimers bearing a macrocyclic core in 1,3-alternate conformation. The size of the formed supramolecular systems of dendrimer/catecholamine was established by the DLS method. A decrease in hemolytic activity of the PAMAM-calix-dendrimers with an increase in the generation number of a dendrimer was shown for the dendrimers with a core in 1,3-alternate conformation. The prospects for the use of the synthesized dendrimers with the macrocyclic core as drug delivery agents were discussed. [ABSTRACT FROM AUTHOR]

Polymer dispersed liquid crystal (PDLC) films with polymer spacer columns were prepared by photomask stepwise polymerisation method. The effects of crosslinker content and liquid crystal (LC) content on the morphologies of polymer spacer columns and electro-optical properties of PDLC films were investigated. Due to the difference of crosslink density and system viscosity, the polymer spacer columns exhibit different morphologies and the electro-optical properties of PDLC films are also altered. Based on the above, the PVA coatings loaded with rare earth phosphor were introduced into PDLC films. The influences of rare earth phosphor concentration on the fluorescent and electro-optical properties of PDLC films were studied. Also, it was found that the UVaging resistance of PDLC films was enhanced because of the loading of rare earth phosphor absorbing UV light. Therefore, the successful preparation of PDLC films with polymer spacer columns and reversible fluorescence properties opens new possibilities for expanding the flexible display applications of PDLC. [ABSTRACT FROM AUTHOR]

The dissolved organic matter (DOM) in the ocean is a large carbon pool that plays an important role in the global carbon cycle. Investigation of the characteristics and behaviors of DOM in some areas facilitates a better understanding of biochemical processes in the water column. In February 2020, water samples were collected to characterize the distribution and optical properties of DOM from the Northern Andaman Sea and the Northeastern Bay of Bengal. A high dissolved organic carbon (DOC) concentration appeared in the Northern Andaman Sea, which is strongly affected by the DOM contents of the Irrawaddy and Salween Rivers. A barrier layer that resulted from the freshwater input was observed above the thermocline. This layer was believed to have had a consistent effect on the concentration of DOM in the surface water and contributed to the differences in DOC concentration on each side of the Preparis Channel. Based on the fluorescence excitation emission matrix and parallel factor analysis, four fluorescent components were identified, including three humic-like components (C1, C2, and C4 with their maximal Ex/Em at ≤240/418 nm, 315/384 nm, and 270 (360)/442 nm and represented as peaks A, M, and A+C, respectively) and one protein-like component (C3 with maximal Ex/Em at 275/334 nm and represented as peak T). The humic-like components were mainly derived from terrestrial inputs. Low levels of humic-like components were confined in the upper water, with strong photodegradation in the euphotic zone. C3 was a typical tryptophan-like component that represented freshly produced autochthonous DOM. The correlation between C3 and biological index and apparent oxygen utilization suggested that it was highly bioavailable and not easy to be preserved in the deep sea. Overall, our results showed the distributions of DOM in the Northern Andaman Sea and the Northeastern Bay of Bengal and revealed the behaviors and controlling factors for DOM in the upper water.

We fabricated a Yb:YAG crystal-derived silica fiber (YCDSF) by the melt-in-tube method with a CO2 laser-heated drawing tower and explored the influences of the heat treatment method on fluorescent properties in the YCDSF. After the heat treatment, the intensity of the emission peaks and the fluorescence lifetime of the YCDSFs improved. In particular, after 1350 °C of heat treatment, a series of sharp peaks appeared in the core layer, which may form a new crystalline phase. Moreover, its emission intensity at 1030 nm was significantly enhanced, over 2 times greater than before the heat treatment. Additionally, the fluorescence lifetime of Yb ions was also increased from 129 to 621 μs, indicating the changes in local environments around Yb ions. Then, schematic models were set up to show how the local environments around Yb ions are gradually changing. These results revealed that the assessed YCDSF is of excellent performance; after the heat treatment, it may be a potential material for realizing optical amplification, light sources, fiber lasers, and so on. [ABSTRACT FROM AUTHOR]

Absract: Carbon nanomaterials are very versatile, but the tunable preparation of their morphology and emission colors is still very challenging. Herein, we present a simple self-assembly method for the preparation of tunable carbon nano (Tween-80@NaCl), where the key tunable parameter is the concentration. More specifically, the structural and optical properties of carbon nanomaterials can be controlled by modulating the concentration of surfactants. It is worth mentioning that salt plays an important role in separating the micelle structure and protecting the micelle morphology. The samples were characterized by Raman spectroscopy and x-ray diffraction to determine the microcrystalline structure and crystal size. The evolution of the micellar structure was established by transmission electron microscopy analysis of the transformation of the Tween-80@NaCl structure. The continuous adjustment of surfactant concentration leads to a change in micelle morphology, like from large-sized blocks to small-sized rods. In addition, carbon nanoparticles with typical fluorescence properties can be obtained by simply changing the surfactant concentration and can easily change from purple fluorescence to dark blue. Notably, this simple strategy of separating first and then carbonizing provides inspiration for future structural design of carbon nanomaterials.

The Tb3+ doped P 2 O 5 -B 2 O 3 -ZnO-SrO (PBZS system) glasses were prepared by the melt-quenching method. The structural, physical, thermal, and optical properties of the Tb3+ doped PBZS glasses are thoroughly investigated. The thermal behaviour shows that the PBZS system exhibits a higher thermal stability. FTIR and Raman spectra reveal that the lower OH- content and phonon energy favors the fluorescent properties. XPS analysis reveals that the Tb ions predominantly exist in the trivalent state. The Judd-Ofelt theory indicates a higher covalency between the Tb3+ and O2- ions. Based on the excitation spectra, the phonon sideband characteristics of Tb3+ are observed, which has rarely been reported in previous studies. Under 378 nm excitation, all the glasses display cold and intense green emissions. The spectral results indicate that the optimum doping content of Tb 2 O 3 is 1.5 mol%, at which point the quantum yield is 29.67 %, and even reaches or exceeds those of the Tb3+ doped glass-ceramics (28.62 %). The energy transfer between the Tb3+ ions is mainly dominated by the dipole-dipole interactions. The lifetimes obtained are all at the millisecond level. Time-resolved emission spectra confirm the photoluminescent stability of the Tb3+ ions. The PBZS glass doped with 1.5 mol% Tb 2 O 3 presents the higher branching ratio (71.69 % >> 50 %), emission cross-section (2.20 × 10−21 cm2), gain bandwidth (2.09 × 10−27 cm3), and optical gain (3.54 × 10−24 cm2·s). A nearly negligible chromaticity shift (0.94–2.33 × 10−2) in 293–473 K that the Tb3+ doped PBZS glasses feature excellent thermochromic properties and thermal stability. The PBZS glass doped with 1.5 mol% Tb 2 O 3 is a potentially preferable fluorescent material for exploiting green lasers and trichromatic white light-emitting diodes (WLEDs). [Display omitted] • Tb3+ doped P 2 O 5 -B 2 O 3 -ZnO-SrO glasses have been fabricated. • Glass doped with 1.5 mol% Tb 2 O 3 has optimal emission and fluorescent stability. • High quantum yield of 29.67 % even matches or exceeds glass ceramic system. • 1.5 mol% Tb 2 O 3 doped PBZS glass has potential for green lasers and WLEDs. [ABSTRACT FROM AUTHOR]

A fluorescent functional PET fabric for effective aqueous copper detection was developed. Eu(TTA) 3 ·2H 2 O complex was prepared by the solvothermal method and subsequently PET fluorescent nonwoven fabrics were prepared by coordinating the complexes with PET nonwoven fabrics grafted with acrylic acid.The chemical structure and microscopic morphology of the fluorescent nonwovens were analyzed, and the effects of different experimental conditions (grafting rate, reaction time, and fluorescent complex concentration) on the fluorescence properties of the materials were investigated. Under optimal experimental conditions, the fluorescent nonwoven fabric exhibited a fluorescence intensity of 2.1 × 105 a.u. and a quantum yield of 6.35%. Additionally, the fluorescence intensity of the fluorescent nonwoven fabric decreased with the increase of aqueous copper concentration, and the quenching effect could be described by the Stern-Volmer equation. Furthermore, adjusting the pH of the aqueous copper at a fixed concentration revealed a linear relationship between the fluorescence intensity and pH. These observations demonstrate a dual response of the fluorescent nonwoven fabric to both aqueous copper and pH, enabling its potential application in the detection of both analytes. [Display omitted] • The fluorescent functional design of PET was realized by simple methods such as UV grafting reaction and solvothermal method. • The fluorescent PET nonwoven fabrics showed a red color under UV excitation and fluorescence response to copper ions and pH. [ABSTRACT FROM AUTHOR]

[Display omitted] • The PFSQ precursor is the only stabilizer of the emulsion system. • Polymer chains synergize with PFSQ network to enhance corrosion protection. • Enrichment of epoxy groups with Si-OH groups achieves fluorescence. • Deliberate molecular structure design entirely improves performances of FEVE coating. Waterborne fluorinated ethylene and vinyl ether copolymer (FEVE) coatings are progressively replacing solvent-based FEVE coatings because of their environmental friendliness. However, their practical application is limited due to the poor adhesion, waterproofing, and corrosion resistance, as well as the environmentally unfriendly nature of the small emulsifiers used. Here, a novel waterborne FEVE coating with excellent adhesion, anti-corrosion, and fluorescent properties was developed using amphiphilic fluorosilane oligomer (PFSQ) as microreactors and chlorotrifluoroethylene (CTFE), isobutyl vinyl ether (IBVE), and glycidyl methacrylate (GMA) as copolymer monomers. The introduction of fluorosilane significantly enhances the hydrophobicity of the coating (the water contact angle increased from 69.3 ± 2.4° to 131.4 ± 1.1°). The epoxy groups in the GMA units of terpolymer facilitate bonding of the coating to the substrate, enhancing the adhesion of the coating to the tinplate substrate (the lap shear strength increased from 0.47 ± 0.04 to 0.92 ± 0.01 MPa). Moreover, the interaction between the epoxy groups of GMA and the silicon hydroxyl groups of PFSQ in the synergistic network leads to the intrinsic luminescence of the coating. In addition, the coating exhibits superior corrosion resistance. The molecular structure design provides a new idea for the development of multifunctional waterborne FEVE coating. [ABSTRACT FROM AUTHOR]

A metallosupramolecular cage-shaped compound (TPPE-p) was synthesized by coordination of tetrakis[4-(4-pyridylphenyl)]ethylene (TPPE), obtained by the coupling reaction between tetrakis(4-bromophenyl)ethene and 4-pyridylboronic acid, with Pt(II) and terephthalate. Although TPPE showed no fluorescence in the solution, weak fluorescence was observed in the TPPE-p solution. When the volume ratio of poor solvent in the TPPE-p solution increased, the fluorescence intensity was dramatically enhanced. The difference in the fluorescence intensities was explained by the degree of intramolecular rotation of the substituents, and TPPE-p was found to show aggregation-induced emission. [ABSTRACT FROM AUTHOR]

By using a half-salen ligand (HL) and substituted salicylaldehydes, new unsymmetrical salen-type ligands (H2L1, H2L2, and H2L3) and their Ni(II), Zn(II) and Fe(III) complexes were synthesized. The compounds were characterized based on elemental analysis, IR, 1H NMR, X-ray diffraction (for HL), spectroscopy, mass spectrometry, magnetic moment, molar conductance measurements, and thermal analysis (TGA). The unsymmetrical salen ligands, during complexation, are attached to the metal by two imine nitrogen atoms and two phenolic oxygen atoms in all complexes; in the Fe(III) complexes, the fifth coordination is completed by chloride. Square planar geometry or distorted square planar geometry for [NiL1-3], [ZnL1-3], and square pyramidal geometry for [FeL1-3Cl] are proposed. Conductance measurements suggest non-electrolytic nature of the metal complexes. Thermogravimetric analysis showed that the complexes exhibit higher stability than the ligands. The electrochemical properties of the compounds were studied by cyclic voltammetry. HOMO-LUMO energy levels and electrochemical band gaps (E′g) were calculated. The solid state electrical conductivity of the iodine-doped compounds was measured and their semiconductor properties were determined. In addition, fluorescence properties of ligands and Zn(II) complexes were investigated. [ABSTRACT FROM AUTHOR]

Four new benzodipyran racemates, namely (±)-aspergiletals A–D (3–6), representing a rare pyrano[4,3-h]chromene scaffold were isolated together with eurotiumide G (1) and eurotiumide F (2) from the soft-coral-derived fungus Aspergillus sp. EGF 15-0-3. All the corresponding optically pure enantiomers were successfully separated by a chiral HPLC column. The structures and configurations of all the compounds were elucidated based on the combination of NMR and HRESIMS data, chiral separation, single-crystal X-ray diffraction, quantum chemical 13C NMR, and electronic circular dichroism calculations. Meanwhile, the structure of eurotiumide G was also revised. The TDP1 inhibitor activities and photophysical properties of the obtained compounds were evaluated. In the TDP1 inhibition assay, as a result of synergy between (+)-6 and (−)-6, (±)-6 displayed strong inhibitory activity to TDP1 with IC50 values of 6.50 ± 0.73 μM. All compounds had a large Stokes shift and could be utilized for elucidating the mode of bioactivities by fluorescence imaging. [ABSTRACT FROM AUTHOR]

In this paper, a simple method has been used to synthesize silver-molybdenum disulfide nanoparticles (Ag-MoS2 NPs) with photothermal and physical inhibition of bacteria. The MoS2 nanocarriers were obtained by an environment-friendly liquid-phase separation method. The coated Ag NPs with high antibacterial activity and fluorescence property endowed the synthesized Ag-MoS2 NPs with the ability to be traced. The Ag-MoS2 NPs had photothermal properties with a maximum photothermal increase of 7 2 ∘ C. The results of the dual photothermal–chemical antibacterial activity using Ag-MoS2 NP carriers showed that Ag-MoS2 NPs had broad-spectrum inhibition activity with MIC values up to 5. 2 ± 0. 3 μ g/mL against Escherichia coli. The Ag-MoS2 NPs were also used to destroy cell integrity by disrupting cell membranes and cell walls to achieve the inhibition of cell survival. The toxicity test in mice demonstrated the nontoxicity of Ag-MoS2 NPs. Ag-MoS2 NPs were studied for dual photothermal–chemical antibacterial activity, and the material reduced the amount of Ag NPs used, resulting in lower biotoxicity, hence providing a possible avenue for the clinical application of Ag NPs. Novel low-toxicity silver-molybdenum disulfide nanoparticles (Ag-MoS2 NPs) using MoS2 as nanocarriers coated with Ag NPs were studied for dual photothermal–chemical antibacterial activity, and the material reduced the amount of Ag NPs used, resulting in lower biotoxicity, hence providing a possible avenue for the clinical application of Ag NPs. [ABSTRACT FROM AUTHOR]

Two types of rhodamine–naphthalimide sensors 1a–1c and RND with different polyamine linkers and terminal chains were designed and synthesized for different ratiometric detection of Fe(III) or Hg(II). The fluorescent properties including response time, pH effect, selectivity, anti-interference, fluorescence titration and reproducibility were investigated and compared in details. Sensor RND possessing two recognition groups of rhodamine and 1-(pyridin-2-ylmethyl)piperazine displayed good response and selectivity to Hg(II) with a detection limit of 1.72 μmol/L, whereas 1a–1c with piperidine instead of 1-(pyridin-2-ylmethyl)piperazine showed quite different recognition to Fe(III) and the detection limit of 1b was the lowest (1.92 μmol/L). The Hg(II)/Fe(III) chelation-induced dual/single recognition mechanisms as well as the structure–fluorescence properties relationships (SFPRs) were discussed in detail with the aid of quantum chemical density functional theory (DFT) calculations. Through adjusting the linker and introducing other recognition groups to rhodamine- naphthalimide system, novel sensors with selective recognition of different metal ions should be achieved. [ABSTRACT FROM AUTHOR]

Composite inorganic-organic functional materials have significant applications in various fields. In this work, we developed a new nanocrystal composite material, where the hyperbranched polymer acted as the desired ligand, cadmium acetate, and selenourea were served as the sources of cadmium and selenium during synthesis, respectively. The success of this hybridization procedure relied on the introduce of carboxylic acid groups and hyperbranched structure in the polymer. The three-dimensional cavities formed in the polymer network helped prevent nanocrystal aggregation. Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis indicated the formation of CdSe nanocrystal in the hyperbranched poly(arylene ether ketone) (expressed as PAEK) matrix. And the high-resolution transmission electron microscopy (HRTEM) confirmed homogenous dispersion of spherical nanocrystals in the CdSe/PAEK nanocomposite. The optical properties of the composite material were determined by UV-vis and photoluminescence (PL) spectroscopy. Meanwhile, the composite material showed good thermal stability by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests. In summary, the obtained nanocrystal composite material combined the good thermal property of PAEK with the unique fluorescent property of CdSe nanocrystals, which is very helpful for the development of robust light-emitting devices. Highlights: The novel CdSe/poly(arylene ether ketone) nanohybrid was prepared by a simple in-situ synthesis method. The synthesis conditions were optimized. The resulting CdSe/PAEK nanohybrids exhibited excellent heat resistance and was very helpful for the development of the robust light-emitting devices. [ABSTRACT FROM AUTHOR]

Three coordination polymers—{[Ag2(SIP)(4-pp)]·[Ag(4-pp)2]·H2O}n, [Pb4(SIP)2(μ 3-OH)2(H2O)2]n, and {[Zn2(SIP)2(4-pp)4][Zn(4-pp)2(H2O)4]·4H2O}n (SIP = 5-sulfoisophthalic acid anion, 4-pp = 4-phenylpyridine)—are constructed under hydrothermal or solvothermal conditions using sodium m -phthalate 5-sulfonate (NaH2SIP) and 4-phenylpyridine as ligands. The structures of the three complexes are determined by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analyses, Fourier-transform infrared analysis, and photoluminescence. The fluorescent properties of the complexes in the solid state are investigated at room temperature, and the results indicate that they all show photoluminescent properties. [ABSTRACT FROM AUTHOR]

The coumarin nucleus is a recurring motif in both natural and synthetic compounds that exhibit a broad spectrum of biological properties including anticoagulant, anti-inflammatory, antioxidant, antiviral, antimicrobial and anticancer agents as well as enzyme inhibitors. On the other hand, it has been reported that the incorporation of a metal ion into coumarin derivatives can increase the activity of such complexes compared to coumarin-based ligands. Accordingly, some of them have been found to display promising antioxidant, antitumor or antibacterial activities. This mini-review briefly summarizes the recent development of coumarin-metal complexes with proven biological properties. The attention is also paid to agents for which practical applications in the detection of biologically important species may be found.

5-Chloro-4-formylpyrrole-3-carboxylates react with anilines or β-naphthylamine when heated in DMF under reflux to form ethyl pyrrolo[2,3-b]quinoline-3-carboxylates or their benzo[f] analogs, which exhibit moderate fluorescent properties. The corresponding carboxylic acids were obtained by alkaline hydrolysis of the synthesized carboxylates. [ABSTRACT FROM AUTHOR]

We fabricated a Yb:YAG crystal-derived silica fiber (YCDSF) by the melt-in-tube method with a CO2 laser-heated drawing tower and explored the influences of the heat treatment method on fluorescent properties in the YCDSF. After the heat treatment, the intensity of the emission peaks and the fluorescence lifetime of the YCDSFs improved. In particular, after 1350 °C of heat treatment, a series of sharp peaks appeared in the core layer, which may form a new crystalline phase. Moreover, its emission intensity at 1030 nm was significantly enhanced, over 2 times greater than before the heat treatment. Additionally, the fluorescence lifetime of Yb ions was also increased from 129 to 621 μs, indicating the changes in local environments around Yb ions. Then, schematic models were set up to show how the local environments around Yb ions are gradually changing. These results revealed that the assessed YCDSF is of excellent performance; after the heat treatment, it may be a potential material for realizing optical amplification, light sources, fiber lasers, and so on.

It remains a big challenge to fabricate biodegradable and recyclable soy protein (SP)-based composite films with great toughness, high strength, and large ductility. In this work, a facile strategy was proposed for preparing advanced SP-based films by simple solution casting of SP and hydroxyl and primary amine-containing hyperbranched polysiloxane (HPSA). The developed SP/HPSA2 film exhibited a high toughness of 17.63 MJ m−3 and a high tensile strength of 15.19 MPa, which was, respectively, 424.70% and 551.93% increase compared with that of the neat SP-based film. Additionally, the SP/HPSA2 film possessed a large strain at failure of 151.01%. The advanced mechanical properties can be interpreted by the toughening and reinforcing mechanism associated with the strain-induced deformation of HPSA as well as the multiple interfacial hydrogen-bonding interactions within the interphase. The composite films exhibited great recyclability due to the reversibility of non-covalent interactions confined in the matrix. Moreover, owing to the incorporation of the heat-resistant and fluorescent HPSA, the SP/HPSA films also possessed high thermal stability and great fluorescent properties. This work offers a simple methodology for the design of mechanically robust, recyclable, and biodegradable composite films, which have potential applications in the fabrication of high-performance, high-transparency, and anti-counterfeiting packaging materials.

New two-component pyrene probes based on oligo(2'-O-methylribonucleotides) for microRNA detection have been designed. They contain the PyA-modified adenine cluster (pentaadenosine fragment that contains 8-(1-ethynylpyrene)-deoxyriboadenosine in the center) and can form a three-way junction (3WJ) structure with a target RNA. We have chosen microRNA let-7a-3p as the RNA target because of the correlation of its concentration in cells with the appearance and progression of cancer. We have compared the thermal stability and fluorescence properties of the two-component probes based on oligo(2'-O-methylribonucleotides) that contain either deoxyriboadenosine (dAdAPyAdAdA) or the (2'-O-methylribo)adenosine (AmAm PyAAmAm) cluster with those of (dAdAPyAdAdA)-containing oligodeoxyribonucleotide. The changes in the fluorescence spectra of two-component probes after hybridization with the RNA target have been demonstrated. These probes can be used for designing a new microRNA detection system. [ABSTRACT FROM AUTHOR]

Three new metal(II)–organic coordination complexes, formula as [Cd3(btc)2(3-dpna)2(H2O)2]·8H2O (1), [Zn3(btc)2(3-dpna)2(H2O)2]·4H2O (2) and [Co3(btc)2(3-dpna)2(H2O)2]·2H2O (3) [3-dpna = N1,N4-di(pyridin-3-yl)naphthalene-1,4-dicarboxamide, H3btc = 1,2,4-benzenetricarboxylic acid], have been successfully synthesized by the hydrothermal methods. Complexes 1–3 exhibit similar 3D coordination networks based on the [M3(btc)2(H2O)2]n [M = Cd(II) for 1, Zn(II) for 2, Co(II) for 3] layers and the μ2-bridging 3-dpna ligand containing the naphthalene-bridging group, representing a 4,4,4-connected {42.64}4{64.82} topology. The photocatalyitc properties of complexes 1–3 toward degrading organic dyes, the fluorescent of complexes 1–3 and the fluorescent sensing activities of complexes 1–2 toward detecting metal ions have been studied. Additionally, the electrochemical and electrocatalytic properties of complex 3 have been investigated. [ABSTRACT FROM AUTHOR]

Four new benzodipyran racemates, namely (±)-aspergiletals A–D (3–6), representing a rare pyrano[4,3-h]chromene scaffold were isolated together with eurotiumide G (1) and eurotiumide F (2) from the soft-coral-derived fungus Aspergillus sp. EGF 15-0-3. All the corresponding optically pure enantiomers were successfully separated by a chiral HPLC column. The structures and configurations of all the compounds were elucidated based on the combination of NMR and HRESIMS data, chiral separation, single-crystal X-ray diffraction, quantum chemical 13C NMR, and electronic circular dichroism calculations. Meanwhile, the structure of eurotiumide G was also revised. The TDP1 inhibitor activities and photophysical properties of the obtained compounds were evaluated. In the TDP1 inhibition assay, as a result of synergy between (+)-6 and (−)-6, (±)-6 displayed strong inhibitory activity to TDP1 with IC50 values of 6.50 ± 0.73 μM. All compounds had a large Stokes shift and could be utilized for elucidating the mode of bioactivities by fluorescence imaging.

Some new Schiff-base compounds based on pyrrole were synthesized by the reaction of 2-amino-1-methyl-4,5-diphenyl-1H-pyrrole-3-carbonitrile (1)with aromatic aldehydes (2a-2e) in ethanol/acetic acid at room temperature. The structures of the Schiff bases were characterized by full spectral data. The fluorescence emission intensity of the Schiff bases has been measured in different polar solvents (protic and aprotic) at different temperatures and also pHs. Among the products of this reaction, 2-[(2-hydroxy-benzylidene)-amino]-1-methyl-4,5-diphenyl-1H-3-carbonitrile(3a) exhibited good results. The molecular docking studies on all Schiff bases revealed that the compound 3a forms a stable complex with polo-like kinase1 as a target and gives a binding affinity value of -8.9 kcal/mol. According to the obtained results, the DFT calculations carried out on 3a by using B3LYP/6-31+G(d,p) level of theory which the theoretical data were in good agreement with the experimental data. Furthermore, the NBO analysis showed the electron transfers correctly.

• Dipyrenylphosphinic acid possesses V-shaped molecular conformation. • Dipyrenylphosphinic acid was successfully immobilized on the surface of boehmite. • Dipyrenylphosphinic acid/boehmite hybrid exhibits little fluorescence red-shift. • Surface confinement wreaks the π-π stacking/aggregation of pyrene ring in hybrid. Ethyldipyrenylphosphate (DPyPOOEt) was designed and synthesized by utilizing ethyldichlorophosphate as the core and 1-bromopyrene as substituting groups, and afterwards dipyrenylphosphinic acid (DPyPOOH) was synthesized by the hydrolysis reaction of DPyPOOEt by using bromotrimethylsilane (TMSBr). Fluorescent hybrid was finally prepared by the dehydration condensation between DPyPOOH and hydroxyl groups on the surface of boehmite. The chemical structure of DPyPOOEt and DPyPOOH were characterized by 1H NMR and 13C NMR. Crystal structure, chemical structure and microtopography of hybrid were characterized by X-ray diffraction spectra (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM), respectively. The results demonstrate that the incorporation of two pyrene substituent groups into phosphine oxide can be successfully immobilized on the surface without any change of crystal structure of boehmite. Fluorescence spectra in solution and powder further demonstrated the occurrence of shape-changed and red-shifted emission peaks of DPyPOOEt and DPyPOOH than that of pyrene. In particular, compared to DPyPOOEt and DPyPOOH in solid, the hybrid shows blue-shifted fluorescence. Optimized molecular conformation, ground electronic structure of DPyPOOEt has been investigated in detail by quantum chemistry method. The introduction of phosphine oxide tunes the conjugated structure of pyrene-ring and spatial conformation between the pyrene-ring. In addition, intramolecular V-shanped conformation when DPyPOOH confined to boehmite surface reduce π-π aggregation between pyrene rings. Therefore, these results indicate that the hybrid is expected to highly efficient blue light-emitting material. [ABSTRACT FROM AUTHOR]

Two novel rhodamine-based polystyrene solid-phase fluorescent sensors PS-AC-I and PS-AC-II with different coordination atoms (O or S) are synthesized and shown to be able to detect Hg(II) ions. They are characterized by Fourier-transform infrared spectroscopy and by scanning electron microscopy analysis. Their fluorescent properties, including response time, pH effects, fluorescence titrations, metal ion competition and recycling, are investigated and compared. Sensor PS-AC-II displayed higher selectivity and sensitivity to Hg(II), with a lower detection limit of 0.032 µM, which was 15 times better than PS-AC-I. A detection mechanism involving the Hg(II) chelation-induced ring-opening of the rhodamine spirolactam is proposed with the aid of theoretical calculations. [ABSTRACT FROM AUTHOR]

A new metal-organic framework, [Pb(hmpcaH)2]n (1), has been hydrothermally synthesized from Pb(OAc)2 · 3H2O and 2-hydroxy-6-methylpyridine-4-carboxylic acid (hmpcaH2; 2), and characterized by IR spectroscopy, elemental and thermogravimetric analysis, and single-crystal X-ray diffraction. In complex 1, each hmpcaH− ligand represents a three-connected node to combine with the hexacoordinated Pb(II) ions, generating a 3D binodal (3,6)-connected ant network. The crystal structure of 2 was determined. The solid-state fluorescence properties of 1 and 2 were investigated. [ABSTRACT FROM AUTHOR]

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In this paper, two types of carbon quantum dot (CQDs) were prepared using biocompatible l‐methionine as the carbon source and urea as the nitrogen source and a one‐step hydrothermal treatment. By changing the reaction solvents (deionized (DI) water and dimethylformamide (DMF)), the maximum emission of the resulting CQDs shifted from blue to red light. Specifically, the emission wavelength of the CQDs moved from 433 nm to 625 nm following embedding of a new functional group (–CONH–) on the surface of the CQDs. Photoluminescence quantum yields of the CQDs with blue and red emission reached 64% and 61%, respectively. The R‐CQDs were used to detect metal ions and a linear relationship was demonstrated between ln(F/F0) and Fe3+ concentration in the range 0–0.5 mmol/L with a detection limit of 0.067 μM. Therefore these R‐CQDs have great potential as fluorescent probes for Fe3+ detection. We expect that the excellent water‐soluble, biocompatible and optical properties of the CQDs developed in this work mean that they will be widely used to detect biological cells. [ABSTRACT FROM AUTHOR]

Nano-modification of polyester has become a research hotspot due to the growing demand for high-performance polyester. As a functional carrier, silica nanoparticles show large potential in improving crystalline properties, enhancing strength of polyester, and fabricating fluorescent polyester. Herein, we briefly traced the latest literature on synthesis of silica modifiers and the resultant polyester nanocomposites and presented a review. Firstly, we investigated synthesis approaches of silica nanoparticles for modifying polyester including sol-gel and reverse microemulsion technology, and their surface modification methods such as grafting silane coupling agent or polymer. Then, we summarized processing technics of silica-polyester nanocomposites, like physical blending, sol-gel processes, and in situ polymerization. Finally, we explored the application of silica nanoparticles in improving crystalline, mechanical, and fluorescent properties of composite materials. We hope the work provides a guideline for the readers working in the fields of silica nanoparticles as well as modifying polyester.

An efficient synthesis and fluorescent properties of a new series of fused pyrimidine derivatives are described. Condensation of aminopyrimidine derivative 1 with acetophenone leads to olefinic pyrimidine 2, various addition-cyclization reactions of which give the corresponding bicyclic pyrimidines 4, 6, and 8. Cycloaddition reaction of pyrimidine 1 to benzoyl isothiocyanate gives thiourea derivative 9. Intramolecular cyclization of compound 9 with NaOH or Br2 produces pyrimidine derivatives 10 or 12, respectively. Heteroannulation of pyrimidine 1 with ninhydrin or α-carbonyl carboxylic acid 15 gives the tetracyclic pyrimidine 14 and diazepine derivative 18, respectively. Fluorescence properties of pyrimidine derivatives have been tested. [ABSTRACT FROM AUTHOR]

Eu3+ doped-CdTe (CdTe:Eu3+) nanocrystals were prepared via a facile hydrothermal method, and Eu3+ was successfully incorporated into the crystal lattice of CdTe and measured by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), ultraviolet–visible (UV–Vis) absorption spectroscopy and fluorescence emission. The CdTe:Eu3+ nanocrystals still have a cubic crystal structure, and the corresponding XRD peaks of CdTe:Eu3+ nanocrystals shift to larger angles compared with those of pure CdTe. The CdTe:Eu3+ nanocrystals are monodisperse and the particles size is about 2–4 nm. Compared with pure CdTe, the CdTe:Eu3+ nanocrystals have larger band gap and thus exhibit blueshift in the emission spectra, which could be accounted for by the energy transfer between Eu3+ and CdTe. To enhance the stability and functionality of CdTe:Eu3+ nanocrystals, the CdTe:Eu3+ nanocrystals were coated with SiO2 and the core–shell SiO2-coated CdTe:Eu3+ nanocrystals (CdTe:Eu3+@SiO2) were prepared via micro-emulsion method. TEM results show that CdTe:Eu3+ nanocrystals are uniformly dispersed in the shell, and CdTe:Eu3+@SiO2 nanospheres are uniformly spherical with an average diameter of about 75 nm. The fluorescence emission of CdTe:Eu3+@SiO2 (567 nm) shows a blueshift compared with that of CdTe:Eu3+ nanocrystals (632 nm), possibly because of altered surface properties after SiO2 coating. CdTe:Eu3+ and CdTe:Eu3+@SiO2 with tunable photoluminescence are potentially useful in fabricating optical and bioimaging devices. [ABSTRACT FROM AUTHOR]

Two new coordination polymers, {[Cd(Hmph)(Itmb)] ∙ H2O}n (I) and [Zn(Hmph)(Bpt)2]n (II) (H2Hmph = homophthalic acid, Itmb = 1-(imidazo-1-yl)-4-(1,2,4-triazole-1-ylmethyl)benzene, Bpt = 3,5-bis(4-pyridyl)-1,2,4-triazole) have been prepared and then characterized by single crystal X-ray diffraction (CIF files CCDC nos. 1842595 (I), 1842591 (II)). Complex I shows a 2D layer structure containing Cd-carboxylate chains linked further by itmb coligands, and the ultimate 3D supramolecular structure is stacked through significant π–π interactions. Complex II displays a zigzag Zn-carboxylate chain structure, which is further extended to the final 3D supramolecular structure by hydrogen-bonding and π–π interactions. TGA experiments indicate that complex I and II have high thermal stabilities because they can maintain framework integrity until 275 and 315°C, respectively. And in comparison, with the free ligands, the fluorescent properties of both CPs show significant blue-shift. [ABSTRACT FROM AUTHOR]