Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A new class of triarylpyridinio-derivatized [4'-(p-phenyl)(n)]terpyridyl ligands, R(1)(2)R(2)TP(+)-(p)(n)tpy, was designed as a novel category of electron-acceptor (A)-substituted proto-photosensitizing molecules. The first elements of this versatile family of ligands (i.e., n = 0, 1 and R(1) = R(2) = H), H(3)TP(+)-tp…
Monolayers of a predominantly hydrophobic poly(styrene)- b -poly(ethylene oxide) copolymer (7% PEO by mass) were transferred to a silicon substrate using the Langmuir−Blodgett method. The films were imaged using atomic force microscopy, and three types of features were observed in various proportions: dots (circular a…
Chromium-containing wastes from various industrial sectors are under critical review. Leather processing is one such industrial activity that generates chromium-bearing wastes in different forms. One of them is chrome shavings, and this contributes to an extent of 10% of the quantum of raw skins/hides processed, amoun…
Adsorption of human serum albumin (HSA) onto conducting polypyrrole powders, doped with chloride (PPyCl), dodecyl sulfonate (PPyDS), and tosylate (PPyTS), has been monitored in 0.1 M phosphate buffer saline (PBS) and pH 7.4 using UV−visible spectroscopy in conjunction with the depletion method. The decreasing trend of…
Measurements of ultrafast fluorescence anisotropy decay in model branched dendritic molecules of different symmetry are reported. These molecules contain the fundamental branching center units of larger dendrimer macromolecules with either three (C(3))- or four (T(d), tetrahedral)-fold symmetry. The anisotropy for a t…
The self-assembly of alpha,alpha'-linked sexithiophenes with chiral and achiral penta(ethylene glycol) chains attached at the alpha-positions of the terminal rings, that is, 2,2':5',2'':5'',2''':5''',2'''':5'''',2'''''-sexithiophene-5,5'''''-dicarboxylic acid-2S)-2-methyl-3,6,9,12,15-pentaoxahexadecyl ester (1) and 2,…
The dehydroxylation/dehydration and Lewis acidity of the surface of monoclinic tungsten oxide (m-WO 3 ) powder as a function of evacuation temperature was investigated by infrared spectroscopy. At room temperature, the m-WO 3 surface contains both isolated and hydrogen bonded hydroxyl groups along with equal amounts o…
We present a new approach for numerical solutions of ab initio quantum chemistry systems. The main idea of the approach, which we call canonical diagonalization, is to diagonalize directly the second quantized Hamiltonian by a sequence of numerical canonical transformations.
It is demonstrated that thiols can adsorb to gold without losing hydrogen. Dodecyl sulfide-capped gold clusters have been prepared and subjected to ligand exchange reactions in perdeuterated benzene by addition of dodecanethiol and subsequently dodecyl disulfide. It is shown by 1H NMR spectroscopy that dodecanethiol m…
A synthesis strategy for the systematic control of the pore wall thickness has been developed for the mesoporous silicas with 2-D hexagonal order using ionic and nonionic surfactant mixtures. The mesoporous silicas have been used as templates for the synthesis of 2-D hexagonally ordered mesoporous carbons with control…
Water solubilization of single-walled carbon nanotubes (SWNTs) has been achieved by functionalizing the SWNT with glucosamine. The grafting of glucosamine to the nanotubes was attained by producing acyl chloride on the carboxylic groups associated with the nanotubes. Subsequently, amide bonds were formed between the g…
We report the first systematic study of initiator density on surface-initiated polymerizations. We used mixed monolayers comprising of undecanethiol and ω-mercaptoundecyl bromoisobutyrate ( 1 ) to initiate the controlled radical polymerization of methyl methacrylate (MMA) and glycidyl methacrylate (GMA) from gold. We…
The synthesis of chiral aluminum and yttrium alkoxides and their application for lactide polymerization are reported. The complexes (SalBinap)MOR [4, M = Al, R = (i)Pr; 5, M = Y, R = (CH(2))(2)NMe(2)] are synthesized by reacting the ligand (SalBinap)H(2) [2,2'-[(1,1'-binaphthalene)-2,2'-diylbis(nitrilomethylidyne)]bis…
Electrospinning is a fabrication process that uses an electric field to control the deposition of polymer fibers onto a target substrate. This electrostatic processing strategy can be used to fabricate fibrous polymer mats composed of fiber diameters ranging from several microns down to 100 nm or less. In this study,…
The crystal structure of the title compound, C7H8NO2+·NO3−, consists of anionic and cationic layers linked by a complex three-dimensional hydrogen-bond network. Each cationic layer contains organic groups (NH3C6H4COOH)+, and each anionic layer contains inorganic (NO3)−. The structure is stabilized by two types of hydr…
For the optimization of the surface-mediated photoalignment process of a poly(di- n -hexylsilane) (PDHS) film, a systematic investigation was conducted with respect to the design of the surface azobenzene (Az) monolayer. The preparative conditions and synthetic design of the Az monolayer were investigated in terms of…
The Yb 3+ -doped non-linear rare-earth calcium oxoborate crystals GdCa 4 O (BO 3 ) 3 (GdCOB) and YCa 4 O(BO 3 ) 3 (YCOB) were investigated by low-temperature absorption and selective excitation spectroscopy. The selective excitation and emission spectra revealed the spectral features of the main Yb 3+ centre and the p…
Abstract The mechanical properties of thermoplastic starch (TPS) and poly(hydroxy ester ether) (PHEE) blends were studied as a function of the starch concentration. The moisture level present during processing significantly affects the morphology. A dispersed droplet morphology was observed even at very high starch le…
Recent experiments indicate that doping low concentrations of bent-core molecules into calamitic smectic solvents can induce anticlinic and biaxial smectic phases. We have carried out Monte Carlo simulations of mixtures of rodlike molecules (hard spherocylinders with length/breadth ratio ${L}_{\mathrm{rod}}/D\phantom{…
A series of Ni(OH) 2 −manganese oxide (NMO) compounds with a mixed layered structure were synthesized by inserting nickel hydroxide into layered manganese oxides, Na−birnessite (NaBir) and Ni−birnessite (NiBir), under hydrothermal conditions. The hydrothermal intercalation reaction and the NMO compounds were investiga…