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Crystalline organic–inorganic hybrids, which exhibit colorimetric responses to ionizing radiation, have recently been recognized as promising alternatives to conventional X‐ray dosimeters. However, X‐ray‐responsive organic–inorganic hybrids are scarce and the strategy to fine‐tune their detection sensitivity remains elusive. Herein, an unprecedented mixed‐ligand strategy is reported to modulate the X‐ray detection efficacy of organic–inorganic hybrids. Deliberately blending the stimuli‐responsive terpyridine carboxylate ligand (tpc−) and the auxiliary pba− group with different ratios gives rise to two OD thorium‐bearing clusters (Th‐102 and Th‐103) and a 1D coordination polymer (Th‐104). Notably, distinct X‐ray sensitivity is evident as a function of molar ratio of the tpc− ligand, following the trend of Th‐102 > Th‐103 > Th‐104. Moreover, Th‐102, which is exclusively built from the tpc− ligands with the highest degree of π–π interactions, exhibits the most sensitive radiochromic and fluorochromic responses toward X‐ray with the lowest detection limit of 1.5 mGy. The study anticipates that this mixed‐ligand strategy will be a versatile approach to tune the X‐ray sensing efficacy of organic–inorganic hybrids. [ABSTRACT FROM AUTHOR]

• A new ternary Co(II) CP was synthesized and characterized. • The first dual-response fluorescence "turn-on" sensor to detect Tb3+ and PEF. • Compound 1 exhibited highly sensitive and selective for the sensing Tb3+ and PEF. • The possible mechanism of fluorescence enhancement was analyzed in detail. It is necessary to employ highly sensitive and rapid detection of antibiotics and heavy ions in the environment. A mixed-ligands ternary Co (II) coordination polymer containing new L ligands, {[Co(L)(mip)(H 2 O)]·2H 2 O} n (1), (L = 2,2′-bis-(2-pyridin-3-yl-vinyl)-3 H ,3′ H -[5,5]bibenzoimidazole, H 2 mip= 5-methylisophthalic acid) was synthesized under solvothermal condition. Compound 1 displays a sql 2D layer with the point symbol of {44.62}. Compound 1 owns excellent thermal and pH stability and can effectively sensitize the luminescence of Tb3+ ions through the "antenna effect". Compound 1 can serve as luminescent probe for detecting pefloxacin and Tb3+ with low detection limits. Especially Compound 1 is the first turn-on sensor for the detecting Tb3+ ions and pefloxacin via fluorescence enhancement. In addition, the sensing mechanism is discussed in detail. A noval ternary Co(II)-based coordination polymer was solvothermally synthesized and characterized, which can act as dual-functional luminescence turn-on sensor to detect Tb3+ and PEF in aqueous solution with high sensitivity, selectivity, and well anti-interference. The luminescence enhancement mechanism is supported by experiments and theoretical calculations. [Display omitted] [ABSTRACT FROM AUTHOR]

A fresh Cu(II) coordination polymer, i.e., [Cu3(Hmbdc)2(mbdc)2(dmphen)2]n (1, H2mbdc = isophthalic acid, dmphen = 4,7-dimethyl-1,10-phenanthroline), has been generated with the hydrothermal reactions between Cu salts and the mixed ligands of 4,7-dimethyl-1,10-phenanthroline and isophthalic acid. Moreover, the catalytic activity of 1 was evaluated via degrading the Congo red with a method of Fenton with an excellent degradation efficiency of 95.8% at 100 min. Next, the application value of compound on stroke was assessed, and the related mechanisms were explored at the same time. First of all, the tumor necrosis factor-α and recombinant rat IL-1β content released into the plasma were determined with enzyme-linked immunosorbent assay detection kit. Besides, the activation of the HMGB1/TLR4 signaling pathway activation in cerebral vascular endothelial cells was also determined with real-time reverse transcription–polymerase chain reaction assay. [ABSTRACT FROM AUTHOR]

Two new Ag(I) coordination polymers, namely [Ag(bpp)]·0.5 n(1,5-NDSA)·n(H2O) (1) and [Ag2(bpp)2]n·n(2,7-NDSA)·2 n(H2O)·n(CH3CN) (2) (Na2(1,5-NDSA) = sodium 1,5-naphthalenedisulfonate dibasic, Na2(2,7-NDSA) = sodium 1,5-naphthalenedisulfonate dibasic, bpp is 1,3-bis(4-pyridyl)propane), were generated via the solution evaporation method under room temperature. Moreover, the solids of these two compounds display strong luminescence emission at RT. And the application values of the compounds against the glioblastoma treatment were determined, and the corresponding mechanism was simultaneously tested. The analysis of CCK-8 was first implemented and the glioblastoma viability was measured. The real-time RT-PCR was next performed, and the signaling pathway activation of VEGF in glioblastoma cells was tested after treating by the above compound. [ABSTRACT FROM AUTHOR]

The development of synthetic approaches towards new mixed‐ligand metal organic frameworks (MOFs) has been attracting considerable attention recently as they display fascinating properties due to the synergistic effect between the different ligands. Herein, the initial combination of pyridine‐2,6‐dimethanol (H2pdm) with benzene‐1,4‐dicarboxylic acid (H2bdc) has provided access to three new mixed‐ligand MOFs, [M3(bdc)2(Hpdm)2]n (MII=ZnII, 1; MnII, 2) and [Mn3(bdc)3(H2pdm)2]n (3). 1–3 are the first MOFs containing H2pdm in its neutral or anionic form. 1 and 2 are isostructural 2D MOFs with a square lattice (sql) framework topology, while 3 is a 3D MOF possessing a primitive cubic (pcu) topology. Dc magnetic susceptibility measurements for 3 demonstrate antiferromagnetic interactions between the MnII ions which is a combination of intra‐ and intertrimer exchange pathways. [ABSTRACT FROM AUTHOR]

In the present study, through employing the mixed ligands of tetrakis(4-carboxyphenyl)silane (H4TCS) and 1,4-bis(2-methylimidazol-1-yl)benzene (BMIB), we have triumphantly created two coordination polymers (CPs) [Co2(TCS)(BMIB)2](DMF)3(H2O)2 (1) and [Co2(H2TCS)2(BMIB)2] (2) with the reaction between the H4TCS ligand and BMIB ligand and Co(NO3)2·6H2O in distinct systems of solvent. Their application values on the acute myocardial infarction were assessed, and then their corresponding mechanism was investigated. Firstly, the ELISA detection assay was performed for the detection of the inflammatory cytokines levels released into plasma during acute myocardial infarction. In addition to this, the real-time RT-PCR was performed and the lncRNA-CAIF levels were determined. [ABSTRACT FROM AUTHOR]

In this current experiment, by applying the mixed-ligand synthesis method, two coordination polymers (CPs) containing Co(II) were created triumphantly with reaction between 1,3-bis(1-imidazoly)benzene (mbib) and Co(II) salts with the aid of diverse carboxylic ligands, and their chemical formulae are [Co3(opda)3(mbib)4(H2O)4]·2H2O (1, H2opda is 1,2-phenylenediacetic acid) and [Co(mpda)(mbib)]·H2O (2, H2mpda is 1,3-phenylenediacetic acid). The two compounds’ magnetic performances suggest that between the adjacent metal ions, there present the antiferromagnetic coupling. The evaluation of their treatment activity against chronic subdural hematoma was carried out and the relevant mechanism was studied simultaneously. Firstly, before the treatment of compound, the chronic subdural hematoma was generated. Furthermore, the enzyme-linked immunosorbent assay detection kit was implemented and in hematoma capsule, the anti-inflammatory cytokines level and pro-inflammatory cytokines level was detected. Additionally, the cytotoxicity of compounds 1 and 2 on the normal human cells was determined with Cell Counting Kit-8 assay. Above all, we proved compound 1 decreased the pro-inflammatory cytokines content and increased the anti-inflammatory cytokines content in the hematoma capsule, which is much stronger than that of compound 2. Both compounds 1 and 2 showed no cytotoxicity on the normal human cells.

In this current experiment, by applying the mixed-ligand synthesis method, two coordination polymers (CPs) containing Co(II) were created triumphantly with reaction between 1,3-bis(1-imidazoly)benzene (mbib) and Co(II) salts with the aid of diverse carboxylic ligands, and their chemical formulae are [Co3(opda)3(mbib)4(H2O)4]·2H2O (1, H2opda is 1,2-phenylenediacetic acid) and [Co(mpda)(mbib)]·H2O (2, H2mpda is 1,3-phenylenediacetic acid). The two compounds' magnetic performances suggest that between the adjacent metal ions, there present the antiferromagnetic coupling. The evaluation of their treatment activity against chronic subdural hematoma was carried out and the relevant mechanism was studied simultaneously. Firstly, before the treatment of compound, the chronic subdural hematoma was generated. Furthermore, the enzyme-linked immunosorbent assay detection kit was implemented and in hematoma capsule, the anti-inflammatory cytokines level and pro-inflammatory cytokines level was detected. Additionally, the cytotoxicity of compounds 1 and 2 on the normal human cells was determined with Cell Counting Kit-8 assay. Above all, we proved compound 1 decreased the pro-inflammatory cytokines content and increased the anti-inflammatory cytokines content in the hematoma capsule, which is much stronger than that of compound 2. Both compounds 1 and 2 showed no cytotoxicity on the normal human cells. [ABSTRACT FROM AUTHOR]

Transition metal carboxylates with O- and N-donor ligands are interesting for their structural features. Seven novel isonicotinamide(inic)-based metal complexes of [Cd(inic)2(L1)2(H2O)2] · 2H2O (1) (L1 = 2-chloronicotinate), [Cd(inic)2(L2)2(H2O)2] (2) (L2 = 2,4-dichlorobenzoate), [Cu(inic)2(L3)2] (3) (L3 = 4-chlorophenoxyacetate), [Cu3(inic)6(L4)2(HL4)2(H2O)2] · 2H2O (4) (L4 = azelate), [Zn(inic)2(L1)2(H2O)2] · (inic) · H2O (5), [Zn(inic)(L5)(H2O)4] (6) (L5 = 3-nitrophthalate) and [Zn2(inic)2(L6)2] · 5H2O (7) (L6 = 1,4-cyclohexanedicarboxylate) have been obtained by the introduction of the carboxylates by the common solution method and are structurally featured by different techniques of EA, IR spectra, TG and SCXRD analysis. The X-ray studies told that these complexes display mononuclear to trinuclear structures with octahedral/square-pyramidal geometry around the Zn2+, trigonal bipyramidal/octahedral at the Cu2+ and octahedral for the Cd2+. The inic in 1–7 are coordinated only in monodentate fashion with its ring N, while 5 has the lattice inic. The carboxylates coordinated to the metal in monodentate, chelating bidentate and bridging bidentate fashions. The pair of complementary N-H···O H-bonds from the CONH2 of the inic were found in all compounds except 7. Except 1 and 2, all other compounds bear the CH-O contacts from the pyridine CH of the inic. The intricate intra- and intermolecular classical H-bonds, CH-N, CH-O, CH-Cl, CH2-O, O-N, O-O, Cl-O, Cl-Cl, CH-π, CH2-π, C-π, N-π, Cl-π and π-π associations are elucidated by the X-ray crystallographic studies, which push the discrete complexes into high-dimensional ordered supramolecular structures. [ABSTRACT FROM AUTHOR]

Two new mixed-ligand coordination polymers of Cd(II), namely, [Cd(H2L)(ip)H2O]n (1) and [Cd(H2L)(Hbtc)]n (2) [H2L = 3-(1H-pyrazol-4-yl)-5-(pyridin-2-yl)-1,2,4-triazole, H2ip = isophthalic acid, H3btc = 1,3,5-benzenetricarboxylic acid], have been hydrothermally synthesized and characterized by elemental analysis, IR spectra, powder X-ray diffraction, and single-crystal X-ray diffraction. Compound 1 displays a one-dimensional chain structure, which upon hydrogen bonding generates 3D supramolecular framework. Compound 2 exhibits a one-dimensional double-chain structure connected by hydrogen bonds with formation of 2D supramolecular framework. Fluorescent properties of two compounds have been studied in the solid state at room temperature. [ABSTRACT FROM AUTHOR]

Under solvothermal conditions, two new Zn(II)-based coordination polymers, namely {[Zn(tptc)0.5(2,2′-bpy)]·dioxane}n (1, H4tptc = p-terphenyl-2,2″,5″,5‴-tetracarboxylate acid, 2,2′-bpy = 2,2′-bipyridine) and [Zn(tptc)0.5(bib)]n (2, bib = 1,3-bis((imidazol-1-yl) benzene), have been synthesized using the mixed-ligand approach. Furthermore, the luminescence studies show that complex 2 can test acetylacetone selectively and sensitively, and the detection limit is 1.72 ppm. In addition, we evaluated the compounds therapeutic effect against uterine leiomyomas. The uterine leiomyomas rats model was established, the compound 1 and compound 2 was used for treatment. The detection of the transforming growth factor-β (TGF-β) releasing from endometrial stromal cells into plasma was detected with an enzyme linked immunosorbent assay (ELISA) detection kit. Then, the mmp-3 and mmp-7 relative expression levels in the uterine smooth muscle cells after compound treatment were measured by the reverse transcription-polymerase chain reaction (RT-PCR). [ABSTRACT FROM AUTHOR]

By applying the mixed-ligand approach, two new Co(II)-including coordination polymers (CPs) {[Co2(Glu)2(1,4-mbix)2(H2O)2]·H2O}n, (1) and {[Co(Glu)(1,4-mbix)]·4H2O}n (2), were formed by taking glutarate (Glu2−) blended with 1,4-bis [(2-methyl-1H-imidazol-1-yl)methyl]benzene (1,4-mbix) by using different reaction temperatures. The as-prepared complexes were evaluated through IR spectroscopy, elemental analysis, powder X-ray diffraction analysis (PXRD), TG analysis and single-crystal X-ray diffraction. The structural characterization results show that complex 1 features a 3D framework structure with a four-connected neb-type topology, while complex 2 demonstrates a 2D layered structure with a four-connected sql-type topology. The magnetic studies show that compounds 1 and 2 have antiferromagnetic coupling between the adjacent metallic ions. Their biological activity on depression animal model was determined and the mechanism was detected. Firstly, the depression animal model was built and the compounds were given for indicated treatment. The nigrostriatal dopamine D2 receptor content was measured by real time reverse transcription-polymerase chain reaction (RT-PCR). The content of the 5-hydroxy trptamine (5-HT) and Norepinephrine (NE) was measured by enzyme linked immunosorbent assay (ELISA) detection kit after compounds treatment. [ABSTRACT FROM AUTHOR]

By the reaction of a rigid π-conjugated H4L linker (5,5′-(1,3,6,8-tetraoxobenzo[lmn][3],[8]phenanthroline-2-7-diyl)bis-1,3-benzenedicarboxylic acid), Cu(NO3)2, and N-donor auxiliary linkers, two new Cu-based coordination polymers (CPs), namely {[Cu(L)0.5(1,4-bib)(H2O)2]·0.5H2O}n (1) and {[Cu(H2L)(4,4′-bibp)(H2O)2]}n (2) {1,4-bib = 1,4-bis(1-imidazolyl)benzene, 4,4′-bibp = 4,4′-bis(imidazolyl)biphenyl} are synthesized under solvothermal conditions and characterized. Furthermore, the protective effect of compounds 1 and 2 on the sepsis mice model is evaluated and the related mechanism is explored. Firstly, the CFU counting assay is performed to detect the bactericidal effect of compounds 1 and 2 in vivo. Then, the ELISA assay is conducted to measure the release of interleukin-1β (IL-1β) and interleukin-6 (IL-6) into the plasma after treatment with the compounds. [ABSTRACT FROM AUTHOR]

Two Co(II)-containing coordination polymers, {Co(TDC)(TPB)0.5·H2O}n (1) and {[Co2(2,6-NDC)2(TPB)]·MeCN·3H2O}n (2) (TPB = 1,2,4,5-tetra(4-pyridyl)benzene, H2TDC = 2,5-thiophenedicarboxylic acid, 2,6-H2NDC = 2,6-naphthalic acid), have been synthesized by a semi-rigid tetrapyridine ligand and auxiliary dicarboxylic ligands. The treatment ability of the compounds on skin necrosis after fracture was assessed and the related mechanism was discussed. First of all, the enzyme-linked immune sorbent assay (ELISA) detection kit was used in this research to detect the content level of the Recombinant Human Macrophage Colony stimulating Factor (MCSF) and Tumor Necrosis Factor-α (TNF-α) after compound treatment. Next, the real time quantitative polymerase chain reaction (RT-PCR) was conducted for the MMP2 and TIMP1 relative expression levels measurement. [ABSTRACT FROM AUTHOR]

By using a mixed-ligand approach, two new coordination polymers with the chemical formula of {[Zn(L)(ip)·H2O]8}n (1, H2ip = isophthalic acid and L = 1,1'-(2-methylpropane-1,3-diyl)bis(1H-benzo[d]imidazole)) and {[Ni(L)(tdc)·2H2O]2}n (2, H2tdc = 2,5-thiophenedicarboxylic acid) have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction analyses, powder X-ray diffraction, thermogravimetric analysis and elemental analysis. In addition, in vitro anticancer activity of compounds 1 and 2 on four human ovarian cancer cells (CoC1, A2780, 3AO and OVCAR) was further determined. The results showed that compared with their organic ligands, the two compounds displayed efficient antitumor activity. [ABSTRACT FROM AUTHOR]

Two novel sulfonic functionalized coordination polymers (CPs) {[Cd1.5(dimb)(5-sip)(H2O)3]·3H2O}n (1, dimb = 1,4-di(1H-imidazol-1-yl)butane) and [Co2(iptz)(Hiptz)(5-sip)(H2O)]·4H2O (2, Hiptz = 1-(4-(1H-imidazole-5-yl)phenyl)-1H-1,2,4-triazole) were acquired via different metal(II) salts reacting with the mixed ligands containing 1-(4-(1H-imidazole-5-yl)phenyl)-1H-1,2,4-triazole, 1,4-di(1H-imidazol-1-yl)butane and sodium 5-sulfoisophthalate (NaH2sip), respectively. Furthermore, the complex 1 based on Cd(II) could be utilized as the luminescent senor for picric acid (PA) detection in water. In bio-research, compounds 1 and 2 treatment effect on chronic periodontitis was assessed and the specific mechanism was discussed. First of all, the RT-PCR was performed to measure the HmuY and fimA genes relative expression level in P.gingivalis after treated by compounds 1 and 2. Then, the TNF-α and IL-6 content in the fluid of gingival crevicular after compounds treatment was determined with ELISA detection kit. [ABSTRACT FROM AUTHOR]

Two Cu(II)-based coordination polymers with the chemical formula of [Cu(bibb)(1,4-NDC)](DMF) (1, bibb = 1,4-bis(benzimidazol-1-yl)−2-butylene, 1,4-H2NDC = 1,4-naphthalenedicarboxylic acid, DMF = N,N-dimethylformamide) and [Cu(bibb)(1,4-NDC)](DMA) (2, N,N-dimethylacetamide) have been prepared. The structural solution and refinement results based on the crystal data show that complex 1 exhibits a rarely 2-fold interpenetrating 3D (4,5)-connected xah framework, and complex 2 possesses an unusual 3D (3,4)-connected dmc topology. Furthermore, the protective activity of compounds 1 and 2 on Viral myocarditis (VMC) was detected on CVB3-induced mouse viral myocarditis model. The relative expression of the inflammatory factors nf-κb and p38 in myocardial cells after compounds 1 and 2 treatment was measured with reverse transcription-polymerase chain reaction (RT-PCR). The release level of the inflammatory cytokines IL-1 and MCP-1 by myocardial cells was determined with enzyme linked immunosorbent assay (ELISA) detection kit. [ABSTRACT FROM AUTHOR]

Via using a mixed-ligand method, two novel coordination polymers based on Cu(II) ions as nodes {[Cu(Py2TTz)0.5(2,6-ndc)]·(DMF)·(C2H5OH)}n (1, Py2TTz = 2,5‐Bis(4‐pyridyl)thiazolo[5,4‐d]thiazole, 2,6-H2ndc = 2,6-naphthalenedicarboxylic acid) and [Cu2(2,6-ndc)2(4-bpdb)·(H2O)3·2DMF]n (2, 4-bpdb = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene) were prepared under the solvothermal conditions. In addition, complexes 1 and 2 could be applied as a photocatalysts under ultraviolet light, the degradation property of methylene blue is relatively high. In the research of biological function, the protective activity of compound 1 and compound 2 was assessed. First of all, the accumulation of reactive oxygen species (ROS) in thyroid cancer cells was detected by ROS detection kit. Then, Annexin V-FITC/PI method was used to detect the percentage for thyroid cancer cells apoptosis after treated by compound. [ABSTRACT FROM AUTHOR]

A systematic investigation into the reactions of Cd(NO3)2·4H2O with o- and p-phenylenediacetic acid within the presence of the semi-rigid 1,4-bis(imidazol-1-ylmethyl)benzene (bimb) co-ligands under similar conditions was carried out. In this study, two novel coordination polymers containing Cd(II) ions as the metal ions {[Cd(μ-opda)(bimb)]·DMF}n (1, opda = 1,2-phenylenediacetate) and [Cd(μ-ppda)(bimb)0.5]n (2, ppda = 1,4-phenylenediacetate) have been prepared and structurally characterized. Furthermore, the inhibitory function of these two synthetic complexes on MG-63 human osteogenic sarcoma cells was evaluated with cell counting kit-8. And the Annexin V-FITC/PI apoptosis detection was performed to detect the induction ability of the complexes on the cancer cell apoptosis. Then, the western blot was performed to measure the activation level of the PTEN-AKT pathway. [ABSTRACT FROM AUTHOR]

In this study, two new mixed-ligand coordination polymers (CPs) {[Cd6(nbta)3(bimb)4(H2O)](H2O)3}n (1, bimb = 4,4′-bis((1H-imidazol-1-yl)methyl)−1,1′-biphenyl) and [Co3(bib)2(nbta)2]n (2, bib = 1,4-bis(benzimidazol-1-yl)−2-butene) have been successfully prepared by reaction of 5-nitro-1,2,3-benzenetricarboxylic acid (H3nbta) with different N-donor ligands under the solvothermal conditions. The as-prepared two CPs have been studied via the elemental analysis along with the single crystal X-ray diffraction. The inhibitory effect of synthesized new mixed-ligand coordination polymers on K562 leukemia cells was evaluated by CCK-8 assay. And the percentage of apoptotic cells after CPs 1 and 2 treatment was assessed by Annexin V-FITC/PI assay. Finally the in vivo effect of CPs on tumor was conducted by tumor volume and mice weight measurement. [ABSTRACT FROM AUTHOR]

Solvothermal reaction of 4,4′-bis(imidazol-1-yl)diphenyl ether (BIDPE) or 1,4-Bis(imidazole-1-ylmethyl)benzene (BiB) with 1,4-benzenedicarboxylic acid (H2bdc) or 4,4'-(thiobis(methylene))dibenzoic acid (H2tba) in the presence of Zn(NO3)2·6H2O or Co(NO3)2·6H2O in a mixed solvent of H2O/DMF yielded two new coordination polymers, namely, [Zn(bdc)(BIDPE)](DMF)2(H2O) (1) and [Co(tba)(BIB)](H2tba)(DMF)(H2O)2 (2). These complexes were characterized by elemental analysis and X-ray single-crystal diffraction, which revealed that complex 1 is a 2D layered network with hexagonal windows while complex 2 is a 1D chain-like structure containing the 0D Co2(BIB)2 loops. Furthermore, the anticancer activity of the two coordination complexes has been evaluated via the CCK-8 assay and western blot assay. [ABSTRACT FROM AUTHOR]

Two new transition metal-based coordination polymers [Zn3(bimb)2(nbta)2]n (1, bimb = 1,4-bis(imidazol-1-yl)-2-butene, H3nbta = 5-nitro-1,2,3-benzenetricarboxylic acid) and {[Cu3(nbta)2(bipp)2(H2O)2](H2O)2}n (2, bipp = 1,4-bis(pyridin-4-ylmethyl)piperazine) have been successfully prepared by reaction of 5-nitro-1,2,3-benzenetricarboxylic acid with the corresponding metal salts and the different N-donor ligands. Furthermore, the treatment effect of compounds 1 and 2 on nephrotic syndrome (NS) was evaluated and the specific mechanism was explored in this research. Firstly, to investigate the level of the Th17 cells and CD4 + CD25 + Foxp3+ regulate cells (Treg) in PBMC was detected with flow cytometry. The RT-PCR was performed to analyze the mRNA expression level of 16sRNA to determine the intestinal flora abundance. [ABSTRACT FROM AUTHOR]

Two new mixed-ligand coordination polymers [Zn(bdc)(bib)]n (1, H2bdc = 1,3-dicarboxybenzene, bib = 1,3-bis(imidazol-1-yl)benzene) and [Zn(NH2-bdc)(bib)]n (2, NH2–H2bdc = 2-amino-1,4-dicarboxybenzene) are successfully prepared by the reaction of zinc nitrate, N-containing and dicarboxylate ligands under the same hydrothermal conditions. The anti-viability of compounds 1 and 2 is assessed with CCK-8 against SW480 colon cancer cells. To further explore the underlying mechanism of compounds, the cell apoptosis and ROS detection are performed in this experiment. [ABSTRACT FROM AUTHOR]

In this study, two new mixed-ligand coordination polymers {[Co(bbi)(tdc)]·5H2O}n (1, bbi = 1,4-bis(imidazolyl)butane) and {[Cu2(bimb)(H2O)(μ3-tdc)2(DMF)2]·H2O}n (2, bimb = 4-bis(1H-imidazol-1-ylmethyl) benzene) were synthesized under the solvothermal conditions via reaction of 2,5-thiophenedicarboxylic acid (H2tdc) with the corresponding metal salts in the existence of different flexible bis-imidazole ligands (bbi for 1 and bimb for 2). The as-prepared two structures were detected via the single crystal X-ray diffraction (SXRD) and then characterized via the analysis of element, powder Xray diffraction (PXRD), thermogravimetric analysis (TGA) as well as infrared (IR) spectroscopy. Furthermore, the protective activity of the compound on the mice with ischemic stroke was evaluated. Firstly, the real time reverse transcription-polymerase chain raction (RT-PCR) was carried out to determine the effect of compounds 1 and 2 against the relative expression level of the glucagon-like peptide 1 receptors (glp1r) on the cerebrovascular endothelial cells. Next, the Morris Water Maze Experiment was also used to detect the improvement function of compounds 1 and 2 on the nice mice cognitive function. [ABSTRACT FROM AUTHOR]

Two novel coordination polymers, formulated as {[Co3(tcpb)2(bimb)(DMF)]}n (1, bimb = 1,4-bis(imidazol-1-ylmethyl)benene, DMF = N,N-dimethylformamide) and {[Co2(tcpb)(bim)](DMF)3·(Dioxane)2·(H2O)3}n (2, Hbim = benzimidazole) were prepared from 1,3,5-tris(4-carbonylphenyloxy)benzene (H3tcpb), a semi-rigid tripodal carboxylate ligand as well as different N-donor ligands under solvothermal conditions. Due to their excellent water stability, complexes 1 and 2 could be used as catalysts for photocatalytic degradation of dye under the UV irradiation. Furthermore, the protective effect of the compound against colitis-associated colon cancer (CAC) was assessed and the particular mechanism was discussed in this study. Firstly, the real time polymerase chain reaction (PCR) was carried out to determine the il-6 and stat3 relative expression in the colon cancer cells after treated by compounds 1 and 2. Then, the percentage of the colon cancer cells after treated by compounds 1 and 2 was detected via Annexin V-FITC/PI apoptosis assay. [ABSTRACT FROM AUTHOR]

Under the solvo‐thermal conditions, two novel CdII mixed‐ligand coordination materials with 2,6‐(1,2,4‐triazole‐4‐yl)pyridine(L1) and aromatic poly‐carboxylic acid co‐ligands such as 5‐R‐isophthalic acid (R = nitro, sulfo), namely [Cd(L1)(NO2‐BDC)(H2O)2]·2H2O (1) and [Cd(L1)(HSIP)(H2O)]·4H2O (2) (NO2‐H2BDC = 5‐nitroisophthalic acid, H3SIP = 5‐sulfobenzene ‐isophthalic acid) were successfully prepared. These CdII mixed‐ligand coordination polymers 1–2 have been measured by crystal X‐ray analysis, FT‐IR spectra and powder X‐ray diffraction analyses. In 1, these seven‐coordinate CdII atoms (Cd1) are inter‐linked by didentate 5‐nitroisophthalic acid ligands forming 1D chain structures. In 2, these L1 and partially de‐pronated HSIP2– are inter‐linked by central CdII centers and are arranged into the unique 2D micro‐porous metal‐organic framework of 2. Side view of 2, it is noted that numerous oxygen atoms of un‐coordinated carboxylate groups and coordinated SO3 groups protrude out and decorate the 2D framework of 2. PXRD patterns of 1 and 2 sample is tested, which is consistent with the simulated PXRD diffraction pattern. Photoluminescence studies show that 2 is highly selective and sensitive to trace elements of Eu3+ with excellent Ksv value (7.86 × 104m–1) and low detection limit (5.56 × 10–2 mM), which also provides a convenient method and platform for real‐time detection of Eu3+. [ABSTRACT FROM AUTHOR]

Two novel coordination polymers based on Cu(II) ions as the metal nodes, {Cu(pydc)(2,2‐bpy)(DMF)}n (1, H2pydc=3,5‐pyridinedicarboxylate, 2,2‐bpy=2,2‐bipyridine) and {[Cu(H2O)2(H2imdc)2](H2O)}n (2, H3imdc=1H‐imidazole‐4,5‐dicarboxylic acid) have been synthesized via the hydrothermal or solvothermal conditions and characterized by techniques of elemental analysis, powder X‐ray diffraction (PXRD) as well as the analysis of single‐crystal X‐ray diffraction. Furthermore, the anti‐tumor activities of compounds 1 and 2 against on U251 brain glioma cells were evaluated in vitro. The Cell Counting Kit‐8 (CCK‐8) detection was performed to assess anti‐tumor activities of compounds 1 and 2 on U251 brain glioma cells. The Annexin V‐FITC/PI approach and Terminal deoxynucleotidyl transferase mediated dUTP nick‐end labeling (TUNEL) staining was used to determine the U251 brain glioma cells apoptosis after compounds treatment. Besides, the ROS assay was utilized to determine the ROS accumulation within U251 brain glioma cells after compounds treatment. The RT‐PCR was conducted to measure the ROS related genes relative expression. [ABSTRACT FROM AUTHOR]

By the mixed-ligand approach, a new coordination polymer with the chemical formula [Cd(bpydb)(bimb)(H2O)](H2O)3(1, H2bpydb = 4,4′-([2,4′-bipyridine]-2′,6′-diyl)dibenzoic acid, bimb = 5,5′-bis(1H-benzo[d]imidazol-2-yl)-2,2′-bipyridine) is successfully prepared via a hydrothermal reaction of Cd(NO3)4H2O, H2bpydb, and bimb in the presence of NaOH as the pH modulator. Furthermore, we use an ultrasonic method to obtain nanoparticles of 1 with an average thickness of 126 nm. To evaluate the antiinflammatory effect of the compound against inflammatory metrorrhagia, the activation of NF-κb signal pathway is measured by RT-PCR. Furthermore, ELSA is used in this research to detect the IL-1β and IL-18 content. [ABSTRACT FROM AUTHOR]

In this study, we report the synthesis and structural characterization of two new Co(II) and Cu(II) containing coordination polymers {[Co2(btc)(mbtz)2]·7H2O}n (1), [Cu2(btc)(mbtz)2]n (2) by using the N donor ligand 1,3-bis(1H-1,2,4-triazol-1-ylmethyl)benzene (mbtz) and the O-donor ligand 1,2,4,5-benzenetetracarboxylic acid (H4btc) as the co-linkers. Furthermore, a sonochemical process was used to produce the nanostructures of coordination polymers 1 and 2. Then, we evaluated the anti-viability of nano 1 and 2 on LTEP lung cancer cells. And the Annexin V-FITC/PI staining was performed to detect the apoptosis induced by nano 1 and 2 on LTEP cells. The ROS level in LTEP cells was measured by DCFH-DA assay. [ABSTRACT FROM AUTHOR]

In this study, a new Co(II)-containing coordination polymer with the chemical formula [Co(ox)(dimb)] (1, ox = oxalic acid, dimb = 1,4-di(1H-imidazol-1-yl)butane) is successfully prepared by the reaction of Co(NO3)2·6H2O, oxalic acid, and 1,4-di(1H-imidazol-1-yl)butane in a mixed solvent of DMF and water under the solvothermal conditions. As-prepared crystalline complex 1 is characterized by the elemental analysis and single crystal X-ray diffraction. Furthermore, the mechanical grinding method is used to produce nanostructured 1 with the average size distribution of around 326 nm. To detect the in vivo protective effect of nano 1 on CVB3-induced myocarditis, the histopathology evaluation is performed. To reveal the underlying relationship between the cell inflammatory response and the mechanism of the compound protective activity, the level of IL-1 and TNF-α in the myocardial tissue is measured by ELISA. [ABSTRACT FROM AUTHOR]

A new difunctional Zn(II) coordination polymer (CP) with the chemical formula of [Zn(TBTA) (L)1.5]n (1) has been synthesized hydrothermally from tetrabromoterephthalic acid (H2TBTA) and 4,4'-bis(imidazole-1-yl)-biphenyl (L) ligands. Furthermore, due to its strong intense emission and open N donor sites, complex 1 could be used as a light-emitting sensor to determine 2,4,6-trinitrophenol (TNP) which has high selectivity and sensitivity. Furthermore, the anti-bacterial effect of the compound against P. gingivalis in vitro was evaluated by measuring the P. gingivalis growth curves after compound treatment. And the RT-PCR assay was performed to detect the relative expression of ragA and ragB, which are important for the P. gingivalis growth. The potential anti-infectious mechanism was further studied by using molecular docking technique. [ABSTRACT FROM AUTHOR]

Solvothermal reactions of Co(NO3)2·6H2O or Ni(NO3)2·6H2O with 1,4-bis((1H-benzo[d]imidazol-1-yl)methyl)benzene (bimb) and 2,5-thiophenedicarboxylic acid (H2tdc) afforded two three-dimensional coordination polymers with the chemical formulas of [Co2(bimb)2(tdc)2]·2H2O (1) and [Ni2(bimb)2(tdc)2]·2H2O (2). Complexes 1-2 were characterized by elemental analysis and single-crystal X-ray diffraction. To evaluate the anti-proliferation ability of the compounds 1 and 2, the Cell counting kit-8 (CCK-8) assay was performed firstly. After that, the Hoechst staining assay was carried out to determine whether the anti-cancer activity of compound has relationship with the cell apoptosis. Next, the western blot detection of the apoptotic proteins was detected to further prove the effect of compound on cells apoptosis. [ABSTRACT FROM AUTHOR]

Solvothermal reactions of 5-methylisophthalic acid (H2mipa) with 1,4-bis(imidazol-1ylmethyl)benzene (1,4-bib) or 1,3-bis(imidazol-1ylmethyl)benzene (1,3-bib) in the presence of Co(NO3)2·6H2O in a mixed solvent of H2O/DMF yielded two new coordination polymers, namely, [Co2(mipa)(1,4-bib)](H2O) (1) and [Co3(Hmipa)2(mipa)2(1,3-bib)](H2tba)(H2O)2 (2). These complexes were characterized by elemental analysis and X-ray single-crystal diffraction, which reveals that complex 1 is mutually interpenetrated each other to form 3D+3D⟶3D interpenetrated framework with crs/dia-e topology, and complex 2 is constructed from the trinuclear [Co3(COO)6] unit connected by tbip ligands to form 1D structures which were extended to form 2D structures by neutral ligands. Furthermore, the anti-ovarian cancer activity of the two coordination complexes has been evaluated via the Cell Counting Kit-8 (CCK-8) assay and western blot assay. [ABSTRACT FROM AUTHOR]

Two new zinc(II) coordination polymers (CPs), namely, {[Zn(BPDC)(L1) 2 ·(H 2 O) 2 ]·H 2 O} n (1) and {[Zn(BPDC)(L2) 0.5 ·(H 2 O)]} n (2) (H 2 BPDC = Biphenyl-4,4′-dicarboxylic acid, L1 = 2-(2-(pyridin-3-yl)vinyl)-1 H -benzimidazole, L2 = 1,1′-(1,6-hexanediyl)bis[2-(2-pyridyl)benzimidazole]) are hydrothermally synthesized and characterized. 1 possesses a straight chain, which is further extended into a 3D supramolecular framework through O−H···O and N−H···O hydrogen bonding interactions. 2 exhibits the hcb layer and further extended through O−H···O hydrogen bonding interactions into 3D supramolecular networks. The two CPs present thermal and pH stabilities. 1 and 2 can act as bifunctional fluorescent sensors for the selective detection of sulfamethoxazole and Fe3+ ion. [ABSTRACT FROM AUTHOR]

A four-fold interpenetrated Zn(II)-based coordination polymer with the chemical formula of {[Zn2(L)2(bdc)]·(H2O)2·DMF}n (1) was synthesized by solvent method using terephthalic acid (H2bdc) and N1,N1,N4,N4-tetrakis(4-(1H-imidazol-1-yl)phenyl)benzene-1,4-diamine (L) as the mixed ligands. The as-prepared complex 1 was measured via the elemental analysis and single crystal X-ray diffraction. Furthermore, due to its strong intense emission, complex 1 could be applied as luminescent sensor to sensitively detect 2,4,6-trinitrophenol (TNP), which has the characteristics of high sensitivity and selectivity. In addition, to evaluate the anti-bacterial effect of compound 1 in vitro, the P.gingivalis growth curves were measured. And the relative expression of ragA and ragB was detected by RT-PCR to reveal the mechanism of the compound in the anti-infectious activity. The potential anti-infectious criteria that has been observed in the experimental measurement has been further studied by using molecular docking technique. [ABSTRACT FROM AUTHOR]

A new mixed‐ligand coordination polymer {[Co(Hbidc)(2,2′‐bpy)(H2O)2]⋅1.5H2O}n (1) has been successfully prepared by the reaction of Co(NO3)2⋅6H2O, 2, 2′‐bipyridine (2,2′‐bpy) as well as benzimidazole‐5, 6‐dicarboxylic acid (H3bidc) in the mixed solvent of water and DMA under solvothermal conditions. Furthermore, a mechanical grinding method was used to produce the nanostructure 1 with the average size of 263 nm. The integrity of H9 C2 cardiomyocytes cell membrane after nano 1 treatment was detected by LDH detection. After nano 1 incubation, the inflammatory level in the H9 C2 cardiomyocytes was evaluated by western blot and ELISA measurement. In addition, the ROS accumulation in H9 C2 cardiomyocytes after nano 1 treatment was determined by H2DCFDA detection assay. Finally, possible interactions between the studied complex 1 and protein has been probed using molecular docking simulation. [ABSTRACT FROM AUTHOR]

Two new coordination polymers [Co2(L)2(4,4′-bipy)(H2O)2](DMA)2 (1, 4,4′-bipy = 4,4′-bipyridine, H2L = 4-(1H-pyrazole-4-yl)benzoic acid) and [Cu2(L)2(4,4′-bipy)](DEF)3 (2, DEF = N, N-diethylformamide), have been synthesized via solvothermal reaction of M(NO3)2·6H2O (M = Co for 1 and Cu for 2) with the pyrazolate/carboxylate ligand and the 4,4′-bipy linker. Both coordination polymer architectures in nanoscale regimes have been prepared and determined via PXRD and SEM, and the cytotoxicity of them against the human cardiac myoma cells H9C2 has been evaluated via the MTT assay with the cisplatin as the reference drug, which demonstrates better anticancer activities of the both nano architectures than those of their samples in micro regimes. [ABSTRACT FROM AUTHOR]

The linker 2,5-di(4-pyridyl)thiazolo[5,4-d]thiazole (Dptztz), whose synthesis and structure is described here, was utilized together with benzene-1,3-dicarboxylate (isophthalate, 1,3-BDC2-) for the preparation of the two-dimensional coordination network [Zn(1,3-BDC)Dptztz].DMF (DMF = dimethylformamide) via a solvothermal reaction. Compound [Zn(1,3-BDC)Dptztz].DMF belongs to the class of coordination polymers with interdigitated structure (CIDs). The incorporated DMF solvent molecules can be removed through solvent exchange and evacuation such that the supramolecular 3D packing of the 2D networks retains porosity for CO2 adsorption in activated [Zn(1,3-BDC)Dptztz]. The first sorption study of a tztz-functionalized porous metal-organic framework material yields a BET surface of 417 m2 /g calculated from the CO2 adsorption data. The heat of adsorption for CO2 exhibits a relative maximum with 27.7 kJ/mol at an adsorbed CO2 amount of about 4 cm3/g STP, which is interpreted as a gate-opening effect. [ABSTRACT FROM AUTHOR]

Three novel coordination polymers, [Zn(sdi) 2 (NO 3 )(H 2 O)]·NO 3 ( 1 ), [Zn(sdi) 2 (H 2 O) 2 ]·2NO 3 ( 2 ) and [Zn(sdi) 0.5 (H 2 C 3 O 4 )(H 2 O)] ( 3 ), (sdi = N , N ′-sulfuryldiimidazole) have been synthesized and characterized by elemental analysis, IR spectroscopy, single crystal X-ray diffraction, powder X-ray diffraction and thermogravimetric analyses. These compounds have abundant structural chemistry ranging from zero-dimensional (0D) ( 1 ), one-dimensional (1D) ( 2 ), to three-dimensional (3D) ( 3 ) networks. Compound 1 displays a 0D structure which formed by [Zn(sdi) 2 ] 2 dimers. Compound 2 possesses 1D chain with closed loops. Notably, compound 3 exhibits a 3D (3,4)-connected net with a (6 3 )(6 5 ·8) topology. Interestingly, compounds 1 – 3 were obtained under similar reaction conditions and the structural diversity of these coordination polymers illustrate the remarkable effect of pH on the self-assembling process. Moreover, the fluorescent properties of these compounds have been investigated. [ABSTRACT FROM AUTHOR]

Three novel coordination polymers, formulated as {[Zn(1,4-bmimb)(PhAA)2]·H2O}n (1), [Cu(1,4-bmimb)0.5(2,6-PyDC)]n (2), and {[Cu(1,4-bmimb)0.5(2-PAC)(HCOO)]·2H2O}n (3) (1,4-bmimb = 1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene; PhAA = phenylacetic acid; 2,6-PyDC = pyridine-2,6-dicarboxylic acid; 2-PAC = 2-pyrazinecarboxylic acid), were synthesized by the self-assembly of mixed ligands with Zn(II) and Cu(II) under solvothermal conditions and characterized by means of single-crystal X-ray diffraction, X-ray powder diffraction, infrared spectra, thermogravimetric analysis, fluorescence spectra and UV-vis absorption spectra. 1 is shown as a Z-shaped chain, which is formed by Zn2+, PhAA ligands, and 1,4-bmimb ligands, and is assembled into a 3D structure by hydrogen bonding and π···π interaction. Similarly, 2 displays a single chain, which is built by Cu2+, 2,6-PyDC ligands, and 1,4-bmimb ligands, and is assembled into a 3D structure by hydrogen bonding and π···π interaction. 3 possesses a 1D ladder structure, which is formed by Cu2+, 2,6-PyDC ligands, and 1,4-bmimb ligands, and is assembled into a 3D structure by hydrogen bonding. The luminescence properties (for 1) and UV-vis spectrum (for 2 and 3) were also studied and discussed.

The structural and magnetic properties of two novel one-dimensional coordination compounds were investigated in the solid crystalline state to support studies of their potential as multifunctional materials. The new compounds are based on Co(II) and are named {[Co 4 (glu) 4 (phen) 4 (H 2 O) 2 ]·H 2 O} n (1) and {[Co 2 (azl) 2 (phen) 2 (H 2 O) 2 ]} n (2) (glu = glutarate, azl = azelate, and phen = 1,10-phenanthroline). Compound (2) is the first crystal structure of a cobalt-based coordination polymer with the mixed ligands azl and phen. The crystal structures of the compounds were determined by single crystal X-ray diffraction; where the influence of the alkyl dicarboxylates on the formation of a 1D looped or a single chain coordination polymer was observed. The FT-IR analysis confirms the coordination modes adopted by the mixed ligands azl and phen and the thermal analysis suggests some thermal stability up to 150-200 °C. Supramolecular analysis suggests an important role of the non-conventional C(sp2)-H···O hydrogen bond patterns in the crystals. Finally, weak antiferromagnetic interactions were observed in both complexes. • Reactions of Co(II) ions with 1,10-phenanthroline and alkyl dicarboxylates (glutaric and azelaic acids) were performed. • Two novel 1-D coordination polymers were obtained, including an unprecedented cobalt-based coordination polymer with mixed ligands azelate and 1,10-phenantroline). • Both coordination compounds exhibit weak antiferromagnetic interactions. Two new coordination polymers {[Co 4 (glu) 4 (phen) 4 (H 2 O) 2 ]·H 2 O} n (1) and {[Co 2 (azl) 2 (fen) 2 (H 2 O) 2 ]} n (2) were synthesized. Magnetic studies revealed weak antiferromagnetic interactions between the Co(II) ions. [Display omitted] [ABSTRACT FROM AUTHOR]

The design and construction of metal organic frameworks (MOFs) or coordination polymers (CPs) with tunable structures is of great interest in recent years, owing to their intriguing structural diversity and potential applications. The mixed-ligand approach is widely used as an effective synthesis method to fabricate CPs. By precise regulation of the structure of N-donor co-ligands, in this work, a series of zinc/cadmium-organic arsonates are successfully synthesized, namely, [Zn 2 (OH)(L-As)(4,4′-Bipy)⋅H 2 O] n (1), [Zn 3 (L-As) 2 (2,2′-Bipy)(H 2 O) 2 ⋅2H 2 O] n (2), [Cd(HL-As)(4,4′-Bipy) 0.5 ] n (3), [Cd(HL-As)(2,2′-Bipy)(H 2 O)⋅H 2 O] n (4) (H 3 L-As ​= ​2-(carboxymethylamino)phenylarsonic acid; 4,4′-Bipy ​= ​4,4′-bipyridine; 2,2′-Bipy ​= ​2,2′-bipyridine). We demonstrate that N-donor co-ligands significantly affect the coordination environment of metal centers and the structure of these compounds. Compound 1 is a three-dimension (3D) hydrogen-bond network via C–H···π interactions between the aromatic rings of L-As ligand, whereas 3 exhibits a 3D framework with 6-connected pcu topological network. By contrast, 2 and 4 are two-dimension (2D) layered structures by adopting chelated 2,2′-Bipy Co-ligand. All compounds display a luminescence from ligand-to-metal charge transfer (LMCT) which depends on the coordination environment of metal centers. The results show that N-donor co-ligands can effectively regulate the structures and luminescent properties of the formed CPs. A series of zinc/cadmium-organic arsonates is successfully synthesized by adopting a mixed-ligand approach with H 3 L-As as the main ligand and 4,4′-bipyridine (4,4′-Bipy) or 2,2′-bipyridine (2,2′-Bipy) as N-Donor co-ligands. The introduction of N-Donor co-ligand affects the coordination modes of H 3 L-As ligand and Zn(II)/Cd(II) ion center and regulates the luminescent properties of the resultant compounds. [Display omitted] • A series of zinc/cadmium-organic arsonates are successfully synthesized by mixed-ligand approach. • N-donor co-ligands significantly affect the coordination environment of metal centers and the structure of these compounds. • Four compounds show different fluorescence properties. [ABSTRACT FROM AUTHOR]

Abstract: A new 3D coordination polymer, Mn2(atz)(isonic)(OH)(Cl)]n (1), was synthesized hydrothermally from mixed-ligands of Hatz (Hatz=5-amino-tetrazolate) and Hisonic (Hisonic=isonicotinate) and corresponding metal salts. It was characterized by IR spectra, elemental and thermal analysis, single crystal and powder X-ray diffraction. Variable temperature magnetic investigations indicate that compound 1 exhibits typical antiferromagnetic behaviors. [Copyright &y& Elsevier]

Abstract: Two Zn(II) and Cd(II) compounds with the in-situ generated ligand of 5-amino-tetrazolate (atz−) were prepared from the hydrothermal reactions of the corresponding Cd or Zn(II) salts with phenylcarboxylate, and characterized by elemental analysis, IR spectroscopy, and TGA. The results of X-ray crystallographic analysis reveal that compound [Zn2(BZA)(atz)2(OH)] n (1) (BZA=benzoic acid) presents a two-dimensional (2D) “hcb” topological network constructed from the ZnN2O2 tetrahedra. In compound [Cd6(atz)6(PTA)3] n (2) (PTA=terephthalic acid), the identical [Cd3(atz)3)]3+ n clusters are connected by atz ligands to generate a 2D cationic layer, and the neighboring cationic layers are pillared by PTA giving birth to 3D network. After simplifying, the complicated 3D network of 2 can be presented as an unprecedented (4, 4, 10)-connected trinodal topology. The formations of the structures show a good example that using the combination of the in-situ generated ligand and other coligand synthetic strategy can construct interesting topological structures. The thermal stabilities and fluorescent properties of the complexes have also been studied. [Copyright &y& Elsevier]

Abstract: A nano-sized mixed-ligand Cd(II) coordination polymer, {[Cd(bpa)(4,4′-bipy)2(H2O)2](ClO4)2} n (1); bpa=trans-1,2-bis(4-pyridyl)ethane and 4,4′-bipy=4,4′-bipyridine, has been synthesized by a sonochemical method and characterized by IR and 1H NMR spectroscopy. Compound 1 grows in one dimension by two different bridging ligands, 4,4′-bipy and bpa. The thermal stability of compound 1 in the bulk form and nano-sized was studied by thermogravimetric (TG) and differential thermal analysis (DTA). The crystallinity of this compound was studied by X-ray powder diffraction and compared with an XRD simulation of the single crystal data. CdO nanoparticles were obtained by direct calcination at 500°C and decomposition in oleic acid at 200°C of the nano-sized compound 1. The obtained cadmium(II) oxide nano-particles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). [Copyright &y& Elsevier]

Abstract: A new coordination polymer, [Cd4(atz)6(PTA)] n has been firstly synthesized by employing mixed-ligand of terephthalic acid (PTA) with the in-situ generated ligand of 5-amino-tetrazolate (atz−). Compound 1 represents a 3D microporous framework constructed from Cd-tetrazolate subunits and the subunits are bridged by PTA and atz ligands. When the subunit was collided into node, compound 1 possesses an unprecedented 3, 9-connected topological network. Furthermore, the investigations of thermal stability and luminescent property of complex 1 indicate that compound 1 may be an excellent candidate for potential blue-light emitting material. [Copyright &y& Elsevier]

Abstract: The hydrothermal reaction of Cu(NO3)2 ·3H2O, Cu(ClO4)2 ·6H2O, or CdSO4 ·8/3H2O with benzene-1,3,5-tricarboxylic acid (H3btc) and 1,2-bis(1,2,4-triazol-4-yl)ethane (btre) produced the mixed-ligand coordination polymers and networks (MOFs) {[Cu(H2btc)2(μ-btre)]} (1), {[Cu4(μ5-btc)2(μ3-OH)2(μ4-btre)]·2H2O} (2), and {[Cd3(μ6-btc)2(μ4-btre)]·H2O} (3). The centrosymmetric tetranuclear, chair-shaped or stepped-cubane Cu4O4 metal building unit in 2 has three different Cu contacts, each involving more than one bridging group. A quasi-butterfly magnetostructural model shows dominant antiferromagnetic interactions in this Cu4 unit with three different magnetic exchange pathways with 2J 1 =258, 2J 2 =−416, and 2J 3 =484cm−1 from the magnetic susceptibility measurement between 1.9 and 300K. For this Cu4O4 unit the Eigenvalues associated with the zero field spin Hamiltonian were calculated by solving the 16×16 matrix in order to obtain here the numerical expression for the magnetic susceptibility. The cadmium-btre framework 3, with bridged Cd strands, shows a strong bluish fluorescence at 421nm upon excitation at 317nm (not seen in the free btre ligand). [Copyright &y& Elsevier]