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To synthesize lead-free primary explosives with good thermal stability, pyridine-2-carbohydrazide (2-PDCA) was used to prepare a novel energetic copper perchlorate complex (ECCs-1), which was structurally characterized by infrared spectroscopy, NMR, and elemental analysis. Its thermal decomposition properties were investigated by thermogravimetry and a synchrotron thermal analyzer, and the sensitivity was tested by the BAM method. The laser ignition experiment and the lead plate tests show that the ECCs-1 complex has a good detonation performance with a high thermal decomposition temperature (215.6 °C) and moderate sensitivity (impact sensitivity = 3 J and friction sensitivity = 5 N). [ABSTRACT FROM AUTHOR]

A series of novel biodegradable homopolymers and copolymers of L -lactide (LA) and δ-valerolactone (VL) were polymerized at 165 °C using stannous octoate as a catalyst initiated with salicylic acid or benzyl alcohol via ring-expansion or ring-opening polymerization, respectively. The polymer chain topology was suggested to be either cyclic or linear depending on the initiator used. The feeding molar ratio of LA : VL was changed to investigate the chain microstructure, thermal properties, as well as degradability of copolymers. 1H-NMR revealed that incorporating 30, 50, and 70 mol% VL provided blocky, gradient, and random chain copolymers, respectively. Increasing VL content relative to the LA content decreased the Tg, Tm, and crystallinity of the copolymers. All copolymers displayed higher thermal stability than PLA homopolymers due to the presence of the VL comonomer. The cyclic polymers showed higher Tg, lower Tm, and lower crystallinity than their linear counterparts. Furthermore, it was found that the degradability of the copolymers can be controlled by adjusting the compositions of VL and LA and their chain architecture. [ABSTRACT FROM AUTHOR]

This paper investigates the synthesis, crystal structure, thermal properties, and energetic performance of two 1D coordination polymers (CPs). The CPs, namely, [Zn(atrz)(DNBA)2(H2O)2]n (1) and [Cd(atrz)(DNBA)2(H2O)2]n (2), were designed and synthesized based on the nitrogen-rich ligand 4,4′-azobis-1,2,4-triazole (atrz) and 3,5-dinitrobenzoic acid (HDNBA) via a mixed ligand strategy using a simple and environment-friendly method. The CPs were characterized by various spectroscopic and analytical techniques along with single-crystal X-ray diffraction (SCXRD). SCXRD analysis reveals a distorted octahedral geometry around the metal ions (Zn/Cd), leading to the formation of a 1D coordination polymer while constructing a 2D structural framework through intermolecular hydrogen bonding. Both the CPs exhibit similar thermal stability but considerably differ in their heat of formation values (1 = −894.43, 2 = 1635.93 kJ mol−1). CP 2 has higher detonation velocity (7.24 km s−1) and pressure (23.67 GPa) compared to 1 (detonation velocity: 6.28 km s−1, detonation pressure: 17.57 GPa) owing to its higher heat of formation and density. Both the CPs exhibit ideal insensitivity to friction and impact stimuli, ensuring their safety during transportation and processing. The value of average activation energy obtained from isoconversion ASTM E698 for 1 and 2 was reported to be 143.8 and 168.0 kJ mol−1, respectively. This study explores the development of energetic CPs through the mixed ligand strategy based on the atrz ligand and incorporating HDNBA as the co-ligand to reduce the sensitivity while maintaining the comparable energetic performance of previously reported atrz-based complexes. This paper also highlights the potential use of CPs as explosives by demonstrating higher energetic performance. [ABSTRACT FROM AUTHOR]

A novel congruent melting compound Cs2Zn4V4O15 has been synthesized by conventional high-temperature solid-state reactions. The compound crystallizes in the monoclinic system, C2/c (No. 15) space group, with a = 15.724(4) Å, b = 5.3548(15) Å, c = 20.921(6) Å, β = 102.572(11)°, V = 1719.3(8) Å3, Z = 4. It is a cesium zinc vanadate with [VO4] units and [V2O7] dimers, which construct the final three-dimensional framework by binding to a one-dimensional zinc oxide chain. In addition, the optical properties and thermal stability of the compound have been studied, and the relationship between the structure and properties has been analyzed through first-principles calculations. [ABSTRACT FROM AUTHOR]

This investigation includes the synthesis and characterization of a new series of ionic liquids (ILs) based on the tetraalkylammonium dication for the absorption of CO2, a step towards the development of more efficient and sustainable technologies. It was possible to synthesize amine-substituted PEG diacrylate by modifying poly(ethylene glycol) (PEG), which was then quaternized with 1-bromopentane to produce the IL PDBr. The other IL products, PDNTf2, PDBF4 and PDPF6, were synthesized via the metathesis of PDBr with the appropriate salt. The synthesized products were characterized using various techniques, such as FTIR, 1H and 13C NMR, elemental analysis, and density and viscosity meters, and evaluated as potential sorbents for CO2 capture. DSC and TGA were used to examine the thermal properties of the ILs. As observed from their thermal degradation behavior, the ILs exhibited two-stage disintegration with thermal stability up to 150 °C. The pressure drop method was used to study the sorption capacity of the ILs towards CO2. The sorption investigation showed that when the pressure is increased, the CO2 absorption increases. Equilibrium is reached in 40 minutes, demonstrating a rapid absorption rate. The IL with the [BF4]− anion (PDBF4) demonstrated a maximum sorption capacity of 0.577 mole fraction of CO2, and can be regenerated and reused efficiently with less than 0.5% variation from its original absorption capacity. The CO2 absorption capacity for the ILs with other anions follows the trend: Br ≈ NTf2 < PF6 < BF4. This work shows that tetraalkylammonium-based dicationic ILs are adaptable, making them a suitable material for many applications, including sustainable CO2 capture technology. [ABSTRACT FROM AUTHOR]

Films of cellulose nanocrystals (CNCs) with chiral nematic organization can show vivid iridescence that arises from their hierarchical structure. Unfortunately, the brittleness of the films limits their potential applications. In this paper, we investigate the incorporation of halloysite nanotubes (HNTs) into CNC films to prepare organic–inorganic composite films with enhanced mechanical properties, while preserving the chiral nematic structure and brilliant iridescence. The hybrid composite films containing 10 wt% HNTs are more elastic than pristine CNC films, with a 1.3-fold increase in tensile strength and a 1.6-fold increase in maximum strain. As well, the incorporation of HNTs slightly improves the thermal stability of the composite films. These materials mimic the hybrid composite structures of crab shells, leading to enhanced mechanical properties and thermal stability of CNC films while maintaining iridescence. [ABSTRACT FROM AUTHOR]

Dynamic crosslinked biobased vitrimers can be recycled, reprocessed and degraded via bon-exchange reactions. However, the competitive raw materials and tedious preparation process bring challenges for application of these sustainable polymers. In this work, a series of itaconic acid-based vitrimers owning dual-dynamic networks (SV1, SV2, SV3, SV4 and SV5) were prepared by one-pot inverse vulcanization, which resolved these aforementioned issues simultaneously. In these vitrimers: sulfur (S8) and itaconic acid (IA) were selected as the chief constituents that could be obtained from industrial/agricultural byproducts; 1,4-butanediol diglycidyl ether (BDE) was used as a crosslinker to regulate the network performance; 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) was utilized as a catalyst for reducing the reaction temperature to a mild range (130 °C) and accelerating transesterification reactions (TERs). The resultant vitrimers exhibited good solvent resistance and thermal stability. In particular, SV5 maintained usable thermal and mechanical properties, with a tensile strength, Young's modulus, toughness, Td5 and Tg of 6.18 MPa, 108.97 MPa, 1.71 MJ m−3, 212 °C and 19 °C, respectively. Benefitting from the exchange of disulfide bonds and TERs, these vitrimers could experience stress relaxation at 100 °C, and the relaxation time decreased from 531 s to 13 s from SV1 to SV5 as the crosslinker content decreased. Accordingly, they could be physically recycled, repaired, welded and chemically degraded at a mild temperature. This work provides a "green" (yet efficient) strategy to prepare vitrimers in one pot, thereby paving a way to obtaining sustainable polymers from industrial and agricultural byproducts. [ABSTRACT FROM AUTHOR]

In this study, a theoretical insight into two newly designed novel CL-20 based high performance energetic compounds, namely bis(nitromethyl)-tetranitrohexaaza-isowurtzitane (BNMTNIW) and bis(nitratomethyl)-tetranitrohexaaza-isowurtzitane BNIMTNIW), is reported. The title compounds are expected to exhibit good densities, 2.05 g cm−3 and 1.98 g cm−3, respectively, and high positive enthalpies of formation and and excellent detonation performance (DP = 44.18 and 41.42 GPa, Dv = 9735 and 9460 m sec−1), respectively. Computed bond dissociation energies (BDEs) and impact sensitivities (IS) suggest that these molecules are more stable than 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (HNIW, CL-20). We also propose a synthetic strategy for the preparation of BNMTNIW and BNIMTNIW from a commercially available starting material, glyoxal. IR and Raman spectra of BNMTNIW and BNIMTNIW are predicted. These attractive propulsive and explosive properties and better thermal stability and sensitivity than CL-20 (HNIW) suggest the great potential of the title compounds as high energy density materials. [ABSTRACT FROM AUTHOR]

The Pd-catalyzed carbene coupling reaction of N-tosylhydrazones and benzyl bromides has been developed into a polymerization process for the first time, providing an efficient method for the synthesis of poly(arylene vinylene)s (PAVs). This method affords PAVs bearing E-vinylene units predominantly. It can also introduce a CF3 group on each vinylene carbon atom in the polymer main chain. The polymerization has a broad scope and the resultant polymers exhibit interesting optical properties and good thermal stabilities. [ABSTRACT FROM AUTHOR]

Energetic metal organic frameworks (EMOFs) is a hot topic in the field of energetic materials research. This paper reports two kinds of EMOFs based on methylene-linked polynitropyrazole and nitroamine 1,2,4-oxadiazole. Their structures were fully characterized by crystallography and their detonation performance and stability performance were explored. The results showed that the crystals of compounds 4 and 5 exhibited a 3D stacking phenomenon due to the action of a large number of hydrogen bonds and coordination bonds inside the crystal. In terms of stability, both 4 and 5 showed good thermal stability (TSADT (4) = 204.4 °C and TSADT (5) = 216.2 °C), but due to the difference in the number of energetic groups (–NO2), the sensitivity of 4 (IS = 6.0 J and FS = 100 N) to mechanical stimuli is significantly lower than that of compound 5 (IS = 1.2 J and FS = 40 N). In terms of energy performance, it is this great advantage in the number of energetic groups that makes compound 5's (Dv = 8.059 km s−1 and P = 30.9 GPa) detonation performance superior to that of 4 (Dv = 7.704 km s−1 and P = 26.9 GPa). This research broadens the horizon for the development of EMOFs based on polynitropyrazole derivatives. [ABSTRACT FROM AUTHOR]

Two new green-emitting iridium(III) complexes containing styrene-modified phenylpyridine ligands, namely, Ir(ppy-VB)2(acac) (Ir-A) and Ir(ppy-VB)2(Stpip) (Ir-S), where ppy-VB = 2-(4-(((4-vinylbenzyl)oxy)methyl)phenyl)pyridine, acac = acetylacetone, and Stpip = bis(diphenylphorothioyl)amide, have been synthesized and characterized via NMR (1H and 13C) and MS spectroscopy, and the structure of Ir-A has been characterized via single crystal X-ray diffraction. Their photophysical and electrochemical properties and thermal stability were investigated systematically. The results showed that these complexes exhibited green emission, suitable HOMO and LUMO energy levels and good thermal stability. [ABSTRACT FROM AUTHOR]

Developing polylactic acid (PLA) shape-memory films with excellent mechanical and thermal properties is essential for applying PLA in the shape-memory materials field. In this study, a series of perylene-bisimide-functionalized graphene nanosheet (PBI–GN)/PLA shape-memory films were successfully prepared by electrospinning. The effects of PBI–GNs on the mechanical, thermal, and shape-memory properties of the PLA nanofiber films were systematically studied. Results showed that with a 9 wt% content of PBI–GNs, the thermal stability of the composite film significantly improved, and the tensile strength and elongation at break increased by 346% and 11.1%, respectively, compared with those of the neat PLA nanofiber film. Moreover, at this percentage of PBI–GNs, the composite film exhibited the maximum shape recovery of 92.3%, which was 36.3% higher than that of the neat film. After five thermomechanical test cycles, the ratio decreased by only 3.7%. [ABSTRACT FROM AUTHOR]

A new series of BaY2−xEuxGe3O10 (x = 0.1–0.8) trigermanates has been synthesized using the solid-state reaction method. A powder XRD study has revealed that the compounds crystallize in the monoclinic system, space group P21/m, Z = 2. The crystal lattice consists of distorted Y/EuO6 octahedra, trigermanate [Ge3O10]8− groups and Ba atoms located in eight-fold coordinated irregular sites. Under UV and 465 nm light excitation, the samples exhibit reddish-orange emission corresponding to the characteristic 5D0 → 7FJ transitions in Eu3+ ions. Concentration dependence study has shown that the powders with europium content x = 0.4–0.6 possess the highest luminescence intensity under 393 nm and 465 nm excitation. It has also been revealed that the predominant mechanism causing concentration quenching in the BaY2−xEuxGe3O10 series is due to multipolar interactions. The investigations on colour characteristics, quantum efficiency and thermal stability performance of BaY2−xEuxGe3O10 phosphors were carried out for the feasibility study of their practical application. The results indicate that BaY2−xEuxGe3O10 can be considered as a promising material for blue-excited phosphor-converted LEDs. [ABSTRACT FROM AUTHOR]

Luminescence thermal quenching of phosphors is one of the prominent problems in restricting their application in high-power LED devices. In the current work, tunable luminescence thermal quenching behaviors, including abnormal negative thermal quenching and normal thermal quenching, were demonstrated for Na3Sc2(PO4)3:Eu2+ phosphors tailored by phase transformation details. A series of ionic substitution schemes were employed to synthesize α-, β- and γ-Na3Sc2(PO4)3:Eu2+ phosphors, which show discrepant phase transformations during heating. The thermal event associated with phase transformation is perceived to be responsible for the observations of abnormal negative thermal quenching performances, in view of the suppression of non-radiative paths by consuming thermal energy during the phenomenon of phase transformation. Our results provide an insight into the relationship between the thermal quenching behaviors and phase transformation details of the Na3Sc2(PO4)3:Eu2+ phosphor and offer a useful clue to exploit high thermal stability phosphors. [ABSTRACT FROM AUTHOR]

Here we present a scalable and green methodology to synthesize a large variety of MIL-100(Fe,M), metal-doped iron-based MOFs with high thermal stability and surface areas. Our synthesis is performed at room temperature in aqueous media and can be applied to doping with p-, d- and f-elements in oxidation states from +I to +V, therefore being highly general. The influence of the doping metal nature on the thermal and textural properties is systematically investigated. We show that large differences between the ionic radius of the doping and the templating metals does not lead to phase segregation. The incorporation of Cu(I) drastically lowers the thermal stability of MIL-100(Fe,Cu), while the incorporation of V, Al and Ti induces the formation of mesopores. Finally, we developed a PXRD-based method that can be combined with TGA to easily access the metal ratios in complex mixed-metal MOFs. [ABSTRACT FROM AUTHOR]

Since the discovery of the copper catalyzed azide alkyne cycloaddition in the early 2000s, tremendous efforts have been devoted to enlarging the scope of applications of this relatively simple to handle reaction. The chemistry of dyes has not been excluded from this enthusiasm so that a wide range of compounds have been synthesized over the years. Several key elements have sustained such research activity, such as the possibility to fine tune the photophysical properties, the easiness of structure screening in order to optimize the optical properties or the thermal stability of the triazole moiety. In this review, an overview of different dyes as well as their applications is reported. [ABSTRACT FROM AUTHOR]

Polydopamine/MIL-53(Fe) (PDA/MIL-53(Fe)) nanocomposite photocatalysts were synthesized with PDA (PDA = polydopamine) and MIL-53(Fe) using a nature-mimicking method. The structures, morphologies, optical properties and thermal stabilities of all the synthesized materials were characterized using a series of methods. In particular, the separation efficiency of photogenerated charge significantly increased after the incorporation of PDA into MIL-53(Fe), which resulted in an elevated photocatalytic activity of PDA/MIL-53(Fe) compared with the control groups. The PDA/MIL-53(Fe) nanocomposite could accelerate the conversion of primary or secondary alcohols into the corresponding aldehydes or ketones with a high specificity by direct hole-involving oxidation under visible-light irradiation and room temperature. The catalysts could be cycled at least three times without a significant decrease in the catalytic activity and this result showed the excellent recyclability and stability of the catalysts. [ABSTRACT FROM AUTHOR]

A 9,9′-bifluorenylidene derivative, 2,2′,2′′,2′′′-([9,9′-bifluorenylidene]-2,2′,7,7′-tetrayltetrakis(4-octylthiophene-5,2-diyl))tetrakis(methanylylidene)tetrakis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene)tetramalononitrile (BF-TDCI4), was synthesized as an electron acceptor for organic photovoltaic cells. Its photophysical and electrochemical properties and thermal stability were investigated systematically. The photovoltaic devices were fabricated using PTB7-Th as the electron donor and BF-TDCI4 as the electron acceptor at various composition ratios. The optimized device exhibited a maximum power conversion efficiency of 4.35% with an open-circuit voltage of 0.87 V. [ABSTRACT FROM AUTHOR]

Various negative photochromes containing a nitrile-rich acceptor with tunable absorption properties and thermal stability of the photo-induced form were synthesized and characterized. High photoswitching contrast due to the contribution of an intensely colored quinoid form of the chromophores of this series was shown for the first time. The obtained results discovered a new direction in the investigation of negative photochromes. [ABSTRACT FROM AUTHOR]

A novel green-yellow emitting Ca1.5Mg0.5Si1−xLixO4−δ:Ce3+ phosphor with high quantum efficiency and thermal stability was discovered for applications in near ultraviolet pumped white light-emitting diodes. Its crystal structure was determined with a single-particle diagnosis approach. The Si sites in the SiO4 tetrahedra are reported for the first time to accommodate Li+ ions. This substitution, confirmed by 6Li solid-state NMR and T.O.F. neutron powder diffraction, causes a disordered occupation of Ca/Mg in the Ca3MgSi2O8 host and favors a phase transformation at ∼330 °C, which results in the formation of the novel phosphor. The produced phosphor was efficiently excited by near UV light peaking at 365 and 410 nm and produced broad green-yellow emission with peaks at 500 and 560 nm, respectively. Its quantum efficiency reached 88.4% (internal) and 55.7% (external) under excitation at 365 nm, and 80.5% (internal) and 42.7% (external) under excitation at 410 nm, while the decrease of luminescence intensity at 200 °C was small (∼26%). A WLED lamp with a high color rendering index of Ra = 92.8 was produced with the combination of a 365 nm emitting chip with blue emitting BaMgAl10O17:Eu2+, green-yellow emitting CMSL:0.01Ce, and red emitting Sr2Si5N8:Eu2+ phosphors. [ABSTRACT FROM AUTHOR]

Blue emitting phosphor is urgently needed in commercial application of white light emitting diodes for the reason that the existing ones lack proper emission and have poor thermal stability. Herein, we report two methods for Sr0.8Ca0.2Al2Si2O8:Eu2+ phosphors that were performed to optimize the luminescence properties and thermal stability based on structural reconstruction. One is partial substitution of Al3+–Sr2+ by Si4+–Na+ forming Sr0.77−xNaxCa0.2Al2−xSi2+xO8:0.03Eu2+ (x = 0–0.7); the other is altering the proportion of Ca2+ and Sr2+, forming Sr0.97−yCayAl2Si2O8:0.03Eu2+ (y = 0–0.97) solid solution. The phosphor's structural evolution, variation of the Eu2+ local environment, luminescence and thermal quenching were explored in detail. As a result, for Sr0.77−xNaxCa0.2Al2−xSi2+xO8:0.03Eu2+ (x = 0–0.7) series, (Al/Si)O4 tetrahedrons are enlarged and Eu–O polyhedrons are compressed; the emission gets red-shifted from 418 nm to 428 nm under 350 nm excitation; the thermostability of Sr0.97−yCayAl2Si2O8:0.03Eu2+ is improved with the incorporation of Si4+–Na+ pair. For Sr0.97−yCayAl2Si2O8:0.03Eu2+ (y = 0–0.97) series, the emission peak shows a large shift from 420 nm to 440 nm, which is attributed to a comprehensive result of nephelauxetic effect and crystal field splitting. Furthermore, thermal stability is improved by the coexistence of Ca2+ and Sr2+. White light emitting diodes fabricated by combining the as-prepared phosphor with commercial phosphors exhibit an excellent color rendering index Ra of 90.1 and a temperature of 4459 K with CIE coordinates of (0.357, 0.356). These results indicate that the as-developed composition series are promising for commercial application. [ABSTRACT FROM AUTHOR]

By virtue of unique planar [Co6(μ3-OH)4] cluster units, a new microporous isonicotinate-based framework with high thermal and framework stabilities was achieved. The guest-free framework demonstrates high capacity and selectivity for C2H2 relative to CO2 and CH4 at room temperature, which was further understood by GCMC simulation. [ABSTRACT FROM AUTHOR]

By virtue of unique planar [Co6(μ3-OH)4] cluster units, a new microporous isonicotinate-based framework with high thermal and framework stabilities was achieved. The guest-free framework demonstrates high capacity and selectivity for C2H2 relative to CO2 and CH4 at room temperature, which was further understood by GCMC simulation. [ABSTRACT FROM AUTHOR]

Reversible luminescence modulation upon photochromic reactions with excellent reproducibility was achieved from Eu3+ doped Bi2.5Na0.5Nb2O9 multifunctional ferroelectrics. The material exhibits strong sensitivity to visible light or sunlight with fast response time without inducing any structural changes. [ABSTRACT FROM AUTHOR]

Bismuth phosphate represents one promising class of luminescent host materials, while its application is challenged by structural instability. In this work, a series of nanocrystals Bi1-xLnxPO4 (x = 0.02--0.09; Ln = La, Ce, Nd, Eu, Er) were prepared with an aim to find new routes in improving the structural stability of BiPO4 nanocrystals. Systematic sample characterization by XRD, SEM, TEM, and EDX indicates that doping a small amount of Ln3+ ions ≤9% could significantly stabilize the low temperature monoclinic phase (LTMP) by retarding the structure transition to the high temperature monoclinic phase (HTMP). For instance, after annealing at 900 °C, the relative contents of LTMP for co-doping of 5% La3+, 5% Nd3+, 5% Ce3+ with 2% Eu3+ were as high as 89%, 87%, and 96%, respectively, which are totally different from the un-doped BiPO4 at this temperature where LTMP is absent completely. This phenomenon has never been reported before for improving the stability of BiPO4, which has been explained in terms of lattice disorder due to the preference of the linking ways of rare earth-oxygen polyhedra and PO4 tetrahedra. With this abnormal structural stabilization, the luminescent properties of the Ln3+ doped LTMP, including emission intensity, lifetime, and quantum efficiency, were further tailored through simply tuning the calcination temperatures. [ABSTRACT FROM AUTHOR]

A two-dimensional (2D) Ag(I) coordination polymer [Ag(Htzsuc)]n (1, H2tzsuc = 2-(1H-1,2,4-triazol-1-yl)succinic acid) comprising a ligand not included in the original reaction mixture but instead generated through an unusual in situ aza-Michael addition reaction of 1H-1,2,4-triazole and fumaric acid during hydrothermal treatment was synthesised. Moreover, the thermal stability and luminescent properties of 1 were discussed. [ABSTRACT FROM AUTHOR]

We report the synthesis of a new Au nanocatalyst with increased thermal stability. This catalyst system consisted of gold nanoparticles attached to functionalized TiO2/SiO2 core-shell nanocomposites, together with the encapsulation of mesoporous silica. The synthesis process mainly involved four steps, which included the synthesis of the TiO2/SiO2 core-shell composites, synthesis of the Au/TiO2/SiO2 particles, coating of Au/TiO2/SiO2 with silica, and etching the outer silica layer. TEM images were used to confirm the success of each of the synthesis steps, and both UV-vis adsorption spectra and the catalytic activity evaluation were employed to investigate the degree of re-exposure of Au nanoparticles after the etching treatment. In our experiments, the obtained mesoSiO2/Au/TiO2/SiO2 catalyst showed a superior thermal stability and higher activity for CO conversion compared to the mesoSiO2/Au/SiO2 one. It resisted sintering during the calcination at 500 °C, whereas the unprotected one was found to sinter. Moreover, it was found that on the mesoSiO2/Au/TiO2/SiO2 sample, the outside silica material could hinder the phase transformation of titania to some extent. Thus, small crystalline particles of TiO2 anchored on the silica beads of the core-shell composites, leading to a better dispersion of small Au nanoparticles and improved catalytic capacity to resist sintering. [ABSTRACT FROM AUTHOR]

A homochiral MOF membrane was successfully and facilely synthesized using an in situ growth method, which had the advantages of cheap raw materials, simple operation and high thermal stability. A diol isomer mixture was used to test the separation efficiency of the membrane at different temperatures and pressures. [ABSTRACT FROM AUTHOR]

A facile strategy was initiated to fabricate large-scale uniform brookite TiO2 nanospindles preferentially grown along the [001] direction, which were highly thermally stable and exhibited superior electrical conductivity, about two orders of magnitude higher than those of anatase and rutile counterparts. [ABSTRACT FROM AUTHOR]