Materials Literature
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The surface of multi-wall carbon nanotubes (MWNTs) was functionalized by covalent linking of long alkyl chains. Such functionalization led to a much better tube dispersion in organic solvents than pristine nanotubes, favored the formation of homogenous nanocomposite films, and yielded good interfacial bonding between…
A new water-soluble polyanionic dendrimer containing 81 benzoate termini (diameter: 11+/-1 nm from DOSY NMR spectroscopy) has been synthesized; it interacts with acetylcholine cations in water-soluble assemblies in which each carboxylate terminus reversibly forms contact ion pairs and aggregates at the tether termini,…
The supramolecular assembly formed in the solid-state by the interaction of dihydroxy tin(IV) tetra(4-pyridyl)porphyrin (TPyP) with water is discussed. The resulting pseudo two-dimensional array of water molecules are ordered into helical chains by hydrogen bonding between neighboring water molecules along the chain a…
A new process to synthesis Eu-doped Ca Al 2 Si 2 O 8 ( Ca Al 2 Si 2 O 8 : Eu ) nanocrystals coated with Si O 2 is proposed. In this process, Ca Al 2 Si 2 O 8 : Eu nanocrystals were precipitated in a Si O 2 -rich matrix through phase separation and crystallization. Eu-doped Ca O – Al 2 O 3 – Si O 2 system glasses, with…
Perfectly aligned nanowire arrays of polycrystalline Cu 2 O were grown by template-pulsed electrodeposition from a cupric acetate–sodium acetate bath into anodic alumina membranes (AAM). The photoelectrochemical behavior of arrays with different nanowire lengths ( 0.5 μ m and 2 μ m ) was investigated in neutral soluti…
Previous mechanistic and crystallographic studies on two C-C hydrolase enzymes, Escherichia coli MhpC and Burkholderia xenovorans BphD, support a general base mechanism for C-C hydrolytic cleavage, rather than the nucleophilic mechanism expected for a serine hydrolase. The role of the active site serine residue could…
Reverse w/o microemulsions consisting of lauryl acrylate (LA), trimethylolpropane triacrylate (TMPTA), nonionic surfactant and aqueous salt solutions were used for the in situ generation of BiOX (X = Cl, I) nanoparticles and their integration into transparent nanocomposite materials viain situ polymerization of the mo…
OBJECTIVES: Except for polyadipate, which is used as an alternative in polyvinylchloride (PVC) feeding tubes, diethylhexylphthalate (DEHP) is the plasticizer used almost exclusively in PVC medical products. A clear response to the chronic intake of DEHP has been shown in several organ systems from different species. I…
The reactions of silver(I) perchlorate with 3-(4,6-dimethyl-2-pyrimidyl)-1,5-dimethyl-1,2,4,5-tetrazane 6-oxide and its oxidized form, the radical 3-(4,6-dimethyl-2-pyrimidyl)-1,5-dimethyl-6-oxoverdazyl, afford one-dimensional compounds 1 and 2. Single crystal X-ray diffraction shows that both compounds are built from…
In order to clarify the origin of coercivity enhancement of Nd-Fe-B sintered magnets by the Grain BoundaryDiffusion Process (GBDP), microstructural observations were performed and the coercivities of magnets processed with various rare-earth oxides were investigated. Microstructural analysis using FE-EPMA revealed tha…
The effect of some mono azo dyes compounds on the dissolution of aluminium in 0.01 M NaOH solutions was studied using weight loss and galvanostatic polarization techniques. The percentage inhibition efficiency was found to increase with increasing concentration of inhibitor and with decreasing temperature. The inhibit…
The reflectivity of a Spherical Lens Reflector is investigated. The scattering of an electromagnetic plane wave by a Spherical Lens Reflector is treated as a classical boundary value problem for Maxwell’s equations. No restrictions are imposed on the electrical size of reflectors and the angular size of the metallic s…
An unprecedented macrocyclic luminescent octanuclear cluster cyclo-[{Pt(C6Cl5)2(mu-OH)(mu-Ag)}4] (Pt-Ag) 2 was self-assembled by the formation of Pt(II)-Ag(I) bonds; the optical properties of this complex were also investigated.
The calixpyrroles (meso-octasubstituted porphyrinogens), which are easy to make and functionalize, are a class of old but new heterocalixarene analogue.This comprehensive review summarizes the progress made in chemistry of calixpyrroles in terms of their synthesis, structure, conformation, functionalization and applic…
The purpose of this article is to present evidence about the quantity and distribution of fluorine in silicon after and during spontaneous etching with F atoms, F2, and XeF2. X-ray photoelectron spectroscopy spectra were analyzed using the method developed by Sven Tougaard designated in this paper as “ST.” It is found…
The X-ray crystallographic characterization and solid state photoluminescence (PL) study of three new tetranuclear copper(I) clusters, [Cu4(O2CR)4], R = (3-F)C6H4 (1), (2,3,4-F)3C6H2 (2), and CF3/C6F5 (3), revealed a dependence of PL on the structural type.
A series of APhen-functionalized ZnS nanoparticles (NPs)–polymer transparent nanocomposites with tunable fluorescent emission were prepared via ligand exchange and in situ bulk polymerization. The APhen-ZnS NPs were synthesized from the mercaptoethanol (ME)-capped ZnS nanoparticles (ME–ZnS NPs) and 5-amino-1,10-phenan…
The gadolinium(III) complex with a new DOTA-based ligand bearing a methanethiosulfonate group (MTS) was synthesized and its relaxivity properties were investigated. MTS-ADO3A is a triacid DOTA derivative with an amide arm substituted by an ethylmethanethiosulfonate function. This ligand was obtained in two steps: tri-…
Highly branched poly(N-isopropyl acrylamide-co-1,2 propandiol-3-methacrylate)s with imidazole end groups and containing anthramethyl methacrylate (AMMA) were prepared. The branch points were produced by incorporating a styryl dithioate ester (a RAFT monomer). The inclusion of AMMA ensures that the polymers fluoresce i…
Two novel non-stoichiometric 3D cyano-bridged coordination networks of general formula CuII2+x{CuII4[WV(CN)8]4−2x[WIV(CN)8]2x}·yH2O were obtained according to two different synthetic strategies. The heterogeneous reaction between solid 2D cyano-bridged network (dienH3){CuII[WV(CN)8]}3·4H2O (1) (dienH33+ = protonated d…