Materials Literature
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Femtosecond visible pump-IR probe studies of Cp2W2(CO)6 in P(OMe)3 and CH2Cl2 have allowed direct observation of a 19-electron intermediate and of disproportionation into CpW(CO)3- and CpW(CO)3P(OMe)3+ on the ultrafast time scale. A new disproportionation mechanism involving in-cage electron transfer between a 19-elec…
Abstract The aggregate morphologies of silver, gold, and mixed silver–gold nanoparticles coated with fuchsine basic were directly investigated by means of transmission electron microscopy. It was found that the aggregation of silver and gold colloids induced by the adsorption of fuchsine basic displayed different aggr…
Novel macrocyclic dendrimers (Scheme 2), having two cis -1,3,5-cyclohexanetricarboxamide ( 1 ) or 1,3,5-benzenetricarboxamide units ( 3 ) in their core, were synthesized, and their self-assembly behaviors were evaluated in solution. Infrared spectroscopy of cis -1,3,5-cyclohexanetricarboxamide cored dendrimer ( 1 ) in…
The quickly growing number of newly synthesized families of dendrimers is not always followed by the information about their properties. Especially, the biological aspect seems not to be explored sufficiently. The aim of this study was to examine the hemotoxicity and cytotoxicity of water-insoluble, fifth-generation t…
Let X be a smooth variety over a field of characteristic p > 0. We prove that the forgetful functor from the category of overconvergent F -isocrystals on X to that of convergent F -isocrystals is fully faithful.The argument uses the quasi-unipotence theorem for overconvergent F -isocrystals (recently proved independen…
For polystyrene blends with poly(butyl methacrylate), replacing poly( n -butyl methacrylate) by poly( tert -butyl methacrylate) results in modified topography of spin-cast films (holes dominating at a surface are exchanged with islands, or vice versa, such individual surface features are increased), decreased PBMA sur…
Conductive multilayer films have been fabricated from the alternating adsorption of the charged polymers, polypyrrole (PPy) and polyallylamine hydrochloride (PAH), on planar substrates as well as onto the surfaces of melamine formaldehyde (MF) microparticles based on the sequenced electrostatic layer-by-layer assembly…
In our previous paper, a method for preparing enormous surface-enhanced Raman scattering (SERS) active substrates through the aggregation of silver particles trapped at an air-water interface was reported. Here, further efforts were devoted to investigate the origin of assembling silver particle films by adsorbing nan…
The analysis of factors contributing to the stability of proteins is a subject of intense debate. Particularly challenging is the study of structural proteins, since their function is their structure. Among these is collagen, the key structural component of bones, skin, cartilage, tendons, and other connecting tissues…
Abstract Summary: A novel thermosensitive amphiphilic copolymer of PNIPAm grafted polyphosphazene (PNIPAm‐ g ‐PPP) has been synthesized through a co‐substitution reaction of poly(dichlorophosphazene) with amino terminated NIPAm oligomer and glycine ethyl ester (GlyEt). The polymer obtained had a molar ratio of 1:5.25…
With the increasing size of the rare-earth ion in the $R{\mathrm{NiO}}_{3}$ perovskites, the room-temperature (RT) orthorhombic distortion shows an unusual collapse and restoration before transforming to the rhombohedral structure. We have studied the orthorhombic distortions under pressure of the RT structure of $R{\…
The empirical bond strength of the SiO bond correlates with the value of the electron density at the bond critical point calculated for a large number of silicates and observed for the silica polymorphs stishovite and coesite. The greater the bond strength, the greater the localization of the electron density at the c…
Using scaling arguments, the equilibrium swelling behaviour of a cross-linked polyelectrolyte gel has been investigated by means of molecular-dynamics simulations of a coarse-grained model; a bead-spring defect-free network with diamond-like topology was considered at the θ-point and under good solvent conditions, whe…
Abstract Summary: High‐density polyethylene (HDPE) micro‐ and nanocomposites with spherical and platelike inclusions were prepared and the effect of filler particles on polymer crystallinity and gas permeability was investigated. Platelike inclusions strongly reduce the polymer permeability coefficient, while spherica…
Using Brownian dynamics computer simulations, we show that the relaxation of a supercooled Brownian system is qualitatively the same as that of a Newtonian system. In particular, near the so-called mode-coupling transition temperature, dynamic properties of the Brownian system exhibit the same deviations from power la…
The tumor targeting properties of a new drug carrier synthesized by bioconjugation of folic acid (FA) to beta-cyclodextrins through a poly(ethylene glycol) (PEG) spacer (CD-PEG-FA) were investigated. Surface plasmon resonance demonstrated that CD-PEG-FA specifically interacts with immobilized folate binding protein (F…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA New Generation of Highly Branched Polymers: Hyperbranched, Segmented Poly(urethane urea) ElastomersS. Unal, I. Yilgor, E. Yilgor, J. P. Sheth, G. L. Wilkes, and T. E. LongView Author Information Department of Chemistry, Virginia P…
We use a spatially resolved, direct spectroscopic probe for electronic structure with an additional sensitivity to chemical compositions to investigate high-quality single crystal samples of La(1/4)Pr(3/8)Ca(3/8)MnO3, establishing the formation of distinct insulating domains embedded in the metallic host at low temper…
Abstract Summary: A novel, stabilizer‐free dispersion polymerization with alkyl esters as reaction media gives uniform alternating microspheres of maleic anhydride (MAn)/vinyl acetate (VAc) copolymer. The diameter of the copolymer microspheres could be precisely controlled from 80 to 750 nm by changing the monomer con…
Lithium ion trafficking: Surprisingly stable and soluble spherical molybdenum oxide based porous nanocontainers/artificial cells (see graphic) interact specifically with their environment, for example, with cations abundant in solution, to incorporate them at well-defined internal cell positions. In the present case,…