Materials Literature
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A new series of subphthalocyanines substituted axially with an oligoethylene glycol chain [SPcB(OCH(2)CH(2))(n)OH, n = 3 (2) or 4 (3)] or a p-phenoxy oligoethylene glycol methyl ether chain [SPcBOC(6)H(4)(OCH(2)CH(2))(n)OCH(3), n = 2 (4) or 3 (5)] have been synthesised by substitution reactions of boron subphthalocyan…
Two kinds of ZnO@polymer core–shell nanoparticles were prepared through polymerization initiated by the inherent free radicals on the ZnO surface. The as-prepared quantum dots exhibited intense blue fluorescence. They were used as raw materials to synthesize blue-emitting ZnO@polymer core–shell microspheres which were…
The nickel complexes 1(+)-3(+) exhibit a delocalized radical character, the extent of which depends on the electronic properties of the phenolate para-substituent.
A cholesterol-appended titanocene gelator was synthesised which forms twisted fibers able to gelate a variety of solvents of different polarity as demonstrated by spectroscopic and microscopic techniques.
We prepared magnetic (Fe(3)O(4)) poly epsilon-caprolactone (PCL) nanoparticles (mean diameter 164 +/- 3 nm) containing an anticancer drug (gemcitabine) using emulsion-diffusion method in order to develop more efficient drug delivery for cancer treatment. Nanoparticles were smooth, well individualized and homogeneous i…
Lithium complexes bearing dianionic amine bis(phenolate) ligands are described. Reactions of ligand precursors H(2)O(2)NN(Me), H(2)O(2)NN(Py) or H(2)O(2)NO(Me) [H(2)O(2)NN(Me)=Me(2)NCH(2)CH(2)N-(CH(2)-2-HO-3,5-C(6)H(2)((t)Bu)(2))(2); H(2)O(2)NN(Py)=(2-C(5)H(4)N)CH(2)N-(CH(2)-2-HO-3,5-C(6)H(2)((t)Bu)(2))(2); H(2)O(2)NO…
The literature regarding the influence of the hole shape on the performance, especially on the losses, of negative-index metamaterials on the basis of the so-called double-fishnet structure is unclear. We investigate this aspect in a systematic theoretical study showing that the figure of merit can differ by as much a…
Water-in-oil (w/o) and oil-in-water (o/w) emulsions were generated using 30-μm pore diameter surface membranes to investigate the factors influencing drop size, and the degree of uniformity of drop size distribution, using a stirred cell employing a simple paddle mounted above a circular disc membrane. The importance…
We have synthesized a novel class of excited-state intramolecular proton transfer-active molecule (DOXG) forming columnar liquid crystals with enhanced fluorescence emission. The intramolecularly H-bonded core of DOXG produced columnar hexagonal and rectangular phases during cooling as a result of strong core-to-core…
The green water-tolerant acid catalyst, periodic mesoporous H3PW12O40/SBA-15, has been prepared by a direct sol-gel co-condensation technique. The composite is an efficient and reusable solid catalyst for the condensation of phenol with a biomass-derived platform molecule, levulinic acid, to produce the important mole…
Sulfonated forms of carbonaceous mesoporous materials, named Starbons®, are active and reusable catalysts for the aqueous phase esterification of dicarboxylic acids. The optimum temperature of preparation of the Starbons® is dependant on the physical properties of the acid substrates.
Surface treatment is often necessary for strong composites. But the challenge for developing countries is to find chemicals and treatment procedures that are cheap and simple but maintain good composite properties. Mercerization followed by silane treatment of natural fibres is among the simplest and cheapest methods…
We show that the optical properties of thin metallic films depend on the thickness of the film as well as on the deposition technique. Several thicknesses of electron-beam-gun-evaporated aluminium films were measured and the refractive index and the extinction coefficient defined using ellipsometry. In addition, the r…
We report the unambiguous detection of a sequence of Hepatitis C Virus (HCV) at concentrations down to the fractional pM range using Single Wall Carbon Nanotube (SWNT) Field Effect Transistor (FET) devices functionalized with Peptide Nucleic Acid (PNA).
We are developing transparent flexible clay films with high thermal resistance and gas barrier properties. The clay films were fabricated by casting aqueous dispersions of synthetic Na+-saponite mixed with various loadings of water-soluble organic polymer. In this paper, the structural, optical, and physical propertie…
We report on experimental and theoretical evidence for solvent inclusion in form II carbamazepine (R3) and discuss the implications for the formation and stability of this form.
We evaluated diamond metal oxide semiconductor field effect transistors (MOSFETs) on (001) homoepitaxial and (110) preferentially oriented large-grain diamond films with an Al2O3gate insulator and demonstrated their improved DC and RF characteristics (IDS= -790 mA/mm and fT= 45 GHz, which are the highest values for di…
A range of polymerisable photochromic naphthopyrans were prepared via the synthesis of an acrylate moiety on either the naphthalene ring (R) and/or the di-aryl (Ar) rings on the 3-position of the naphthopyran. The monomers obtained (NA) were copolymerised with methyl methacrylate (MMA) and methyl acrylate (MA) by the…
This article reviews the progress in conjugated block copolymers and co-oligomers. The discussion focuses on recent advances in the synthesis and supramolecular assemblies of conjugated diblock copolymers. New knowledge in supramolecular chemistry learned from studies of rod–coil conjugated diblock copolymers is discu…
All three atropisomers of photochromic diarylethenes were isolated for the first time and the stereospecific photochemical switching process studied by UV-vis and CD spectroscopy.