Materials Literature
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We report the results of simulations of the phase diagrams of a quasi-two-dimensional (Q2D) colloid assembly and of a two-dimensional (2D) colloid assembly which have the same colloid-colloid interaction. That interaction is the same as used in the study reported by Zangi and Rice [Phys. Rev. E 58, 7529 (1998)]. Among…
Structural characteristics and optical properties of ethyl−cyanoethyl cellulose [(E−CE)C]/acrylic acid (AA) cholesteric liquid crystalline solutions and their variations caused by polymerization AA were investigated by UV−vis spectroscopy and wide-angle X-ray scattering (WAXS). With increasing (E−CE)C concentration, b…
Abstract For Abstract see ChemInform Abstract in Full Text.
Novel branch-like CdS micropatterns were synthesized using thiosemicarbazide (NH 2 NHCSNH 2 ) both as a sulfur source and as a capping ligand in a methanol/water system. The thiosemicarbazide/CdCl 2 ratios were found to effectively play crucial roles in the morphologies of CdS crystals. With the ratios decreasing from…
The transition of crystal growth is revealed in ultrathin poly(ethylene oxide)/poly(methyl methacrylate) (PEO/PMMA) blend films (film thickness D < 3 nm) as the crystallization condition changes from vacuum to humidity. The PEO crystallizes into a fractal-like branched structure in a vacuum from a state mixed with PMM…
Abstract To get more information on the structure of iodinated poly(vinyl alcohol) (PVA), thermal analyses of unoriented and oriented PVA films were conducted. Unoriented and oriented PVA films iodinated with aqueous solutions at selected concentrations were carried out by thermogravimetry (TG) and differential scanni…
Time-resolved infrared spectral measurement was performed in the solvent-induced crystallization process of syndiotactic polystyrene (sPS) glass at the various temperatures, and the crystallization kinetics were analyzed quantitatively. Both of the crystallization rate constant and the crystallinity estimated after pa…
We present experimental results on the crystal–amorphous transition of forsterite (Mg2SiO4) silicate under ion irradiation. The aim of this work is to study the structural evolution of one of the most abundant crystalline silicates observed in space driven by ion irradiation. To this aim, forsterite films have been sy…
A detailed investigation of the nature of the binding of each of the 20 common alpha-amino acids and various selected dipeptides to a chiral, diaqua-ytterbium complex in aqueous solution has been carried out. Analysis of the dipolar 1H NMR paramagnetic shifts suggests that the alpha-amino acids form a common chelated…
Ipsocentric current density maps are computed at the coupled Hartree-Fock level in the 6-31G** basis set for the planar C(2v) B3LYP geometries of the expanded porphyrins, sapphyrin and orangarin. Both give clearly dominant global macrocyclic ring currents, but with opposite senses of circulation: in 22[small pi] sapph…
Abstract Nano‐CaCO 3 /polypropylene (PP) composites modified with polypropylene grafted with acrylic acid (PP‐ g ‐AA) or acrylic acid with and without dicumyl peroxide (DCP) were prepared by a twin‐screw extruder. The crystallization and melting behavior of PP in the composites were investigated by DSC. The experiment…
The spin crossover compounds [FeL2](BF4)2, L=2,6-di(3-methylpyrazol-1-yl)pyrazine and [FeL2](ClO4)2 have very unusual two stage spin transitions which are initially steep and then become more gradual. A detailed variable temperature single crystal X-ray diffraction study has shown that the course of the spin transitio…
We present experimental results on the crystal–amorphous transition of forsterite (Mg2SiO4) silicate under ion irradiation. The aim of this work is to study the structural evolution of one of the most abundant crystalline silicates observed in space driven by ion irradiation. To this aim, forsterite films have been sy…
Poly(lactic acid) has recently seen its development as a textile fiber. With the resin prepared from agricultural feedstock, the fiber has properties typical of a synthetic fiber, while still being fully biodegradable. This article is an attempt to review recent research developments which have taken this polymer from…
The potentially tridentate ligand 2-(8-aminoquinolino)-4,6-di-tert-butylphenol, H[1LAP], has been synthesized and its coordination chemistry with Mn(IV), Fe(III), and Co(III) has been investigated by X-ray crystallography, electro- and magnetochemistry, electronic, Mossbauer and EPR spectroscopies. The following compl…
In this paper we describe the large-scale synthesis of inorganic fullerene-like (IF-like) hexagonal boron nitride with vessel, hollow sphere, peanut, and onion structures by reacting BBr(3) with the synergic nitrogen sources NaNH(2) and NH(4)Cl at 400-450 degrees C for 6-12 h. The composition of products could be conf…
High-resolution X-ray diffraction data have been collected on the cubic polymorph of antimony(III) oxide (senarmontite) to determine the charge distribution in the crystal. The results are in quantitative agreement with crystal Hartree-Fock calculations for this polymorph, and have been compared with theoretical calcu…
Modification of wide band gap semiconductor surfaces by a new generation of supramolecular sensitizers combining porphyrin and ruthenium-polypyridyl complexes leads to versatile molecular interfaces, allowing the exploitation of photoinduced charge transfer in photoelectrochemical devices.
Abstract The objective of this research was to improve the fire‐retardant properties of wood in one treatment using a phosphorus pentoxide–amine system. Phosphorus pentoxide and 16 amines including alkyl, halophenyl, and phenyl amines were compounded in N,N ‐dimethylformamide and the resulting solutions containing pho…
Supercritical CO 2 is a promising solvent for application in polymer blending and foaming. Interfacial tension is a key parameter in determining the bubble nucleation and growth rates, as well as droplet breakup in blending. However, very limited data are available in the literature for CO 2 −polymer systems. In this…