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。
The adsorption of H 2O, alcohols (CH 3OH and 1-octanol), and carboxylic acids (formic, acetic, and pentanoic) on beta-Ga 2O 3 nanoribbons has been studied using infrared reflection-absorption spectroscopy (IRRAS) and/or ab initio computational modeling. Adsorption energies and geometries are sensitive to surface struc…
We report a method to determine the particle size distribution of small colloidal silica spheres via analytical ultracentrifugation and show that the average particle size, variance, standard deviation, and relative polydispersity can be obtained from a single sedimentation velocity (SV) analytical ultracentrifugation…
We have fabricated density-controlled ZnO nanorod arrays on a flexible substrate (Teflon) using inductively coupled plasma (ICP) etching with anodic aluminum oxide (AAO) membranes and microwave irradiation without using a catalyst at 90 °C. The average interpore distances of Si surface etched with an AAO membrane anod…
The planar component of 2-{3-cyano-4-[3-(1-decyl-1,4-dihydroquinolin-4-ylidene)prop-1-enyl]-5,5-dimethyl-2,5-dihydrofuran-2-ylidene}malononitrile, C(32)H(46)N(4)O, (I), forms into layers parallel to the (\overline{1}01) plane. The larger of the two spaces between layers is filled by the alkyl chains, giving a ;sandwic…
Abstract The formation of silicic acid–tiron complexes was predicted based on the increase in the solubility of amorphous silica in aqueous tiron solution near neutral pH compared with aqueous sodium chloride solutions of the same pH. A 6-coordinated silicic acid–tiron complex was detected by 29Si NMR and the composit…
Four mixed-valent (Mn(IV)Mn(III)(6)Mn(II)(6)) tridecanuclear Mn clusters [Mn(13)O(8)(OH)(6)(ndc)(6)] (1), [Mn(13)O(8)(OEt)(5)(OH)(ndc)(6)] (2), [Mn(13)O(8)(O(2)CPh)(12)(OEt)(6)] (3), and [Mn(13)O(8)(OMe)(6)(ndc)(6)] (4) are reported, where ndcH(2) is 1,8-naphthalenedicarboxylic acid. This is the first use of the latte…
We report here the first examples of poly(organophosphazenes) with side groups derived from the purines guanine and adenine and the pyrimidine cytosine. Polymers with these purines or pyrimidines as the only side groups proved difficult to synthesize by macromolecular substitution techniques because of the insolubilit…
Liposomes containing phosphatidylcholine and cholesterol (uncoated) and coated by chitosan, gelatin, and combination of chitosan and gelatin were prepared by the modified ethanol injection method. The aim of this work was to formulate and characterize liposomes of camptothecin (CPT)-11-HCl (Irinotecan HCl) containing…
The NO molecules adsorbed on Cu(I) sites in FAU lattice show strong red shift of stretching bond frequencies in comparison to the gas-phase NO. Three IR mononitrosyl bands can be found in Cu(I)Y (1815, 1793, and 1780 cm −1 ) and two in Cu(I)X (1772 and 1757 cm −1 ), respectively. Theoretical models allow association o…
Ionene polymers with N,N ′ -( p -phenylene)dibenzamide linkages were synthesized in high yields by the copolymerization of 1,4-bis[4-(chloromethyl)benzamide]benzene and α,ω-ditertiary amines in N,N -dimethylformamide. The ionene polymers provided physical hydrogels under ca. 1−5 wt % of the concentrations after heatin…
A pi-extended, redox-active bridging ligand 4',5'-bis(propylthio)tetrathiafulvenyl[i]dipyrido[2,3-a:3',2'-c]phenazine (L) was prepared via direct Schiff-base condensation of the corresponding diamine-tetrathiafulvalene (TTF) precursor with 4,7-phenanthroline-5,6-dione. Reactions of L with [Ru(bpy)(2)Cl(2)] afforded it…
We present observations of resonance behavior in a torsional nanoelectromechanical device built with an individual single-walled carbon nanotube. The effect of applied torsional strain on the transport properties of the nanotube provides an electrical signal transducer and hence a means of measuring oscillation amplit…
Linear viscoelastic and dielectric behavior was examined for blends of cis -polyisoprene (PI-20; M PI = 19. 9 × 10 3 ) and poly(4- tert -butylstyrene) (PtBS-16; M PtBS = 16. 4 × 10 3 ) with the PtBS concentration of w PtBS = 30 and 50 wt %. At temperatures examined, T ≤ 120 °C, the PI/PtBS blends were in a statically…
Nano-Au/Co3O4 catalyst with high gold loading was found to be a good catalytic material for the elimination of trace ethylene (ppb) at ambient conditions. The gold nanoparticles dispersed on the support nano-Co3O4 surface contribute to this high activity at room temperature. The relatively rapid deactivation trend was…
The combination of a highly reactive monomer, 2-(methacryloyloxy)ethyl succinate (MES), and active catalyst systems, e.g., Cu(I) complexed with 1,1,4,7,10,10-hexamethyltriethylenetetramine (HMTETA), allows rapid formation of poly(carboxylic acid) brushes by atom transfer radical polymerization (ATRP) from a surface. A…
Highly nanostructured hybrid materials were prepared by the intercalation into the interlayer spaces of kaolinite of ionic liquids based on imidazolium derivatives. Their structure, thermal behavior, and composition were characterized by a range of methods, including X-ray diffraction, solid-state NMR, thermal gravime…
The objective of this work was to investigate the effect of fatty acid (FA) type and content on mechanical properties, water vapor permeability and oxygen permeability of hydroxypropyl methycellulose (HPMC)-beeswax (BW) stand-alone edible films. The effect of these films formed as coatings on the postharvest quality o…
A new supramolecular system, consisting of an expanded porphyrin, cyclo[8]pyrrole (C8) and a pyrene carboxylate (Py) is capable not only of electron transfer upon photoexcitation, but results in "umpolung" or a reversal of the predicted charge-separation behavior in that the higher energy radical ion pair, C8.+-Py.- (…
The preparation and the properties of gold nanoparticles (Au NPs) protected by perfluorinated amphiphiles are described. The thiols were devised to form a perfluorinated region close to the gold surface and to have a hydrophilic portion in contact with the bulk solvent to impart solubility in water. The monolayer prot…
Novel biodegradable amphiphilic ABC 3-miktoarm star terpolymers composed of poly(ε-caprolactone) (PCL), monomethoxy poly(ethylene glycol) (MPEG), and polyphosphoester (PPE) were synthesized by a combination of ring-opening polymerization and “click” chemistry. MPEG was first end-capped by epoxide ring, which was opene…