Strain engineering provides an efficient strategy to modulate the fundamental properties of semiconducting structures for use in functional electronic and optoelectronic devices. Here, we report on how the strain affects the bandgap, optical anisotropy and stability of two-dimensional (2D) perovskite (BA)2(MA)n-1PbnI3n+1 (n = 1-3) microplates, using photoluminescence spectroscopy. Upon applying external strain, the bandgap decreases at a rate of -5.60/-2.74/-1.38 meV per % for n = 1, 2, and 3 2D perovskites, respectively. This change of the bandgap can be ascribed to the distortion of the octahedra (Pb-I bond contraction) in 2D perovskites, supported by a study on emission anisotropy, which increases with the increase of strain. In addition, the external strain can significantly deteriorate the stability of 2D perovskites due to the strain induced distortion which would make the penetration of moisture and oxygen into the perovskite microplates easier, resulting in much faster degradation rates. Our findings not only provide insights into the design and optimization of functional devices, but also provide a new approach to improve the stability of 2D perovskite based devices.Two chloroantimonate hybrids with isomeric bipyridyltriazoliums and similar packing patterns, [2-bpt]2[(SbCl5)Cl2]n (1) and [4-bpt]2[(SbCl5)Cl2]n (2) (2-bpt2+ = protonated 3,5-bis(pyridine-2-yl)-1,2,4-triazole, 4-bpt2+ = protonated 3,5-bis(pyridine-4-yl)-1,2,4-triazole), have been designed and synthesized. Distinct intermolecular electronic interactions and photochromic behaviors are attributed to the remarkable modulation of positional isomeric effect on the electron deficiency of the acceptors and donor-acceptor matching relationship. 1 is the first reported photochromic chloroantimonate hybrid.Rare earths (REs) and their oxides have aroused worldwide interest because of their unusual and remarkable properties, which mainly stem from the unique 4f orbital of REs. Research on their potential applications in electrochemical energy storage devices is just budding, and needs bold and active exploration. Here, a multifunctional Sc2O3@CNT-coated separator was developed and introduced into the Li-S battery system, simply by coating a thin and lightweight capping layer of a synthesized composite of Sc2O3 nanocrystal decorated carbon nanotubes (Sc2O3@CNTs) over one side of a commercial separator. The Li-S battery based on the Sc2O3@CNT-coated separator possesses very important properties, including high capacity, superior cycling stability, impressive rate performance, favorable anti-self-discharge capabilities, and greatly mitigated anode corrosion. Theoretical computation and experimental results demonstrate that such outstanding electrochemical properties originate from the synergy of CNTs and Sc2O3, which enables the Sc2O3@CNT-coated separator to achieve an optimal balance of multiple functions (1) physically blocking polysulfide migration and acting as an upper current collector, (2) chemically anchoring polysulfide species, and (3) catalytically promoting the conversion of sulfur species into Li2S2/Li2S. This work first applies Sc2O3 to Li-S batteries, and the encouraging results show great potential of rare earth oxides for producing high-performance energy storage devices.Recently, organic-inorganic hybrid perovskites (OIHPs) are rising as promising candidates for light-emitting applications, due to their superior optical properties. High performance light-emitting applications such as scintillators require minimum non-radiative recombination and high fractions of radiative recombination. Here, we report a simple solution-processing strategy for the synthesis of funnel-type CH3NH3(MA)PbCl3/CH3NH3(MA)PbBrxCl3-x heterostructure perovskite materials that improve the light emission performances. The single crystal X-ray diffraction pattern indicates that the lattice mismatch is only ∼3.24% in the heterointerface. The halide gradient is helpful for driving the photoexcited carriers from the internal high bandgap material to the low bandgap light-emitter layer. The steady-state photoluminescence (PL) and radioluminescence (RL) spectra show that the luminescence intensity has been significantly improved by this heterostructure perovskite. Time-resolved photoluminescence (TRPL) exhibits carrier transport along the halide gradient. Our research suggests that the gradient halide perovskite heterostructure with specific optical properties could be a prospect for commercial scintillator applications.The excessive use of traditional antibiotic and antibacterial agents has globally increased the growth of antibiotic-resistant bacteria that poses serious health risks. Therefore, the development of new generation antibacterial or antimicrobial agents for effective inhibition of bacterial growth is highly desired. In this study, we report a facile one-step synthesis approach for the preparation of a nanocomposite composed of silver nanoparticles (AgNPs) decorated with sulfur-doped graphene quantum dots (S-GQDs). The nanocomposite was comprehensively characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis absorption spectra, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS).  https://www.selleckchem.com/products/actinomycin-d.html  The characterization results demonstrated that the AgNPs were closely and uniformly surrounded by the S-GQDs, and consequently, this ensured the dispersion and stability of the so formed nanocomposite (Ag@S-GQDs). Further, the antibacterial activity of the Ag@S-GQDl coatings and useful health care products supporting cell viability.The present work investigates the effect of CO2 on the CH2OO + CO reaction, employing the CCSD(T)/CBS//M06-2X/aug-cc-pVTZ level of theory. Our calculations reveal that, in the presence of CO2, the reaction barrier of the title reaction can be reduced by up to ∼5.0 kcal mol-1. In addition, it has been found that in the presence of a catalyst, three different paths become available by which the reaction can proceed. Besides, the estimated rate constant values reveal that the bimolecular rate constant for the catalyzed path can be ∼20.0 times higher than that for the uncatalyzed channel.