Materials Literature
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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…
Several monomesogens of ferrocene derivatives bearing the N‐benzoyl‐N′‐arylthiourea (BATU) bidentate ligand have been synthesized. A non‐symmetric dimesogen in which two structurally different mesogenic groups, namely the BATU and cholesteryl moieties, inter‐linked by a flexible spacer has also been synthesized. The a…
Piezoelectric response hysteresis curves of Pb(Zr0.2Ti0.8)O3-based capacitors have been measured by piezoresponse force microscopy. The piezoelectric coefficient d33 was found to vary considerably depending on the position of the probing tip on the top electrode for films possessing a c∕a∕c domain structure. d33 value…
BACKGROUND: We describe the database ExplorEnz, which is the primary repository for EC numbers and enzyme data that are being curated on behalf of the IUBMB. The enzyme nomenclature is incorporated into many other resources, including the ExPASy-ENZYME, BRENDA and KEGG bioinformatics databases. DESCRIPTION: The data,…
Diatoms are known to grow elaborate nano- and microstructured silica shells by depositing material from precursor-containing vesicles at mild temperature and pH. Oligo(1-methylazetane) and related moieties, in some cases attached to proteins, are believed to facilitate this process. To complement prior studies of more…
Inorganic–polymer nanocomposites are of significant interest for emerging materials due to their improved properties and unique combination of properties. A novel one-step synthesis route has been developed for making the polymer nanocomposites silica–poly(vinyl acetate) (SiO2–PVAc) in supercritical CO2 (scCO2), where…
The authors have developed novel hyaluronic acid (HA)-collagen sponge materials (HACSMs) composed of various ratios of bird feet (BF) and pig skin (PS) collagen that are fabricated employing a combination of freezing, lyophilizing, and 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) crosslinking methods. Morpholo…
Porous plates made of nanofibrous crystalline cellulose were prepared, and used as a solid support for microbial cultures. Representative mesophilic microorganisms (, , and ) grew on the cellulose plate, just as well as they did on the conventional agar plate. optical microscopic examination revealed that the cellulos…
Tungsten oxide nanoclusters supported highly ordered mesoporous SBA-15 material has been successfully synthesized in a single step using a non-ionic surfactant as a template and used for the selective oxidation of sulfur compounds, giving excellent yields at room temperature with exceptional catalyst recyclability.
This paper describes methods for electrochemically polymerizing conducting polymer poly(3,4-dioxyethylenethiophene) (PEDOT) nanofibrils on microfabricated neural prosthetic devices from aqueous solutions containing polyacrylic acid (PAA). These fibrils have characteristic sizes ranging from 100 to 1000 nm in diameter,…
The dynamics of spreading of a water drop on a vertically aligned Si nanorod array surface is studied with a fast charge coupled device camera. Four dynamic spreading regimes are identified, with a precursor rim advancing ahead of the contact line. The diameters of the precursor rim Dp, the precursor length δ, and the…
We report on the conception, design, fabrication, experimental characterization, and theoretical analysis of nanocrystal scintillators hybridized on Si detectors and CCDs for enhanced detection and imaging in UV. Integrating luminescent CdSe/ZnS core-shell nanocrystals (NCs of 3.2 and 5.2 nm in diameter with 5% size d…
Thin films of Nd and Mn cosubstituted bismuth titanate, i.e., Bi3.15Nd0.85(Ti3−xMnx)O12 (BNTM) (x=0, 0.005, 0.01, 0.03, 0.05, and 0.1), were fabricated on Pt∕Ti∕SiO2∕Si(100) substrates at 700°C by a chemical solution deposition technique. The structures of the films were analyzed using x-ray diffraction and Raman spec…
We report on optical channel waveguiding in an organic crystalline waveguide produced by direct electron beam patterning. The refractive index profile as a function of the applied electron fluence has been determined by a reflection scan method in the nonlinear optical organic crystal 4-N, N-dimethylamino-4'-N'-methyl…