Materials Literature
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Hierarchical zeolite structures with designed shapes were fabricated by a ceramic processing method—gel-casting of colloidal nanocrytal suspensions.
The reaction of 2,2'-bisdipyrrins 1, 2, and 3 with manganese(II) acetate tetrahydrate and molecular dioxygen yields the manganese(III)corroles 4, 5 and 6, which are readily demetalated to the respective free-base corroles.
The synthesis, characterization, and electrochemical and spectroscopic properties of a new family of dendrimers comprising a 4,4′-bipyridinium core and 1,3-dimethyleneoxybenzene-type dendrons are described. The electrochemical results show that there is no significant inhibition of electron transfer involving the dend…
The pressure dependences of the phonon lifetimes of zone-center optical phonons of various group IV and III–V semiconductors are calculated from first principles using third-order density-functional perturbation theory. The microscopic mechanism responsible, i.e. the anharmonic decay of a phonon into phonons of differ…
Evidence for Reversible Formation of Metallic Cu in Cu0.1 V 2 O 5 Xerogel Cathodes during Intercalation Cycling of Li + Ions as Detected by X-Ray Absorption Spectroscopy , Giorgetti, Marco, Mukerjee, Sanjeev, Passerini, Stefano, McBreen, James, Smyrl, William H.
The water soluble poly(ferrocenylsilane) polycation, poly(ferrocenyl(3-ammoniumpropyl)methylsilane), was synthesized by transition metal-catalyzed ring-opening polymerization of the novel [1]ferrocenophane Fe(η-C5H4)2SiCH3(CH2)3Cl and by subsequent side group modification. Amination of the chloropropyl moieties using…
We report the formation of host-guest complexes between water-soluble calix[n]arene-p-tetrasulfonates (n = 4, 6, 8) or 2-hydroxypropyl-cyclodextrins (alpha-, beta-, gamma-) and the tetratosylate salt of 5,10,15,20-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP). The binding constants ranging between 10(2) and 10(5) M-1 w…
OBJECTIVE: To investigate the effects of Absorbitol on body weight, anthropometry, body composition, blood pressures and lipid profiles in obese, hypercholesterolaemic subjects without dietary restriction. DESIGN: A randomised, double blind. Placebo-controlled study. SUBJECTS: Normal volunteers with no history of chro…
Abstract Thioantimonates, Solvothermal Synthesis, Chalcogenides The reaction of elemental manganese, antimony and sulfur with ethylamine under mild solvothermal conditions yielded a thioantimonate(III) with composition Mn 2 (EA) 2 Sb 2 S 5 (EA = C 2 H 5 NH 2 ) that is a new member of a series of polymeric manganese th…
A novel mesoporous iron phosphate, possessing a specific surface area of 254 m2 g−1 and average pore diameter of 2.6 nm, is synthesized using a fluoride route.
A green process, using a recyclable tungstate-exchanged Mg-Al layered double hydroxide (LDH-WO4(2-)) heterogenised catalyst and aqueous H2O2 oxidant in water, leads to N-oxidation of aliphatic tert-amines to amine N-oxides in quantitative yields, at a high rate at room temperature.
A new structural family of heteropolytungstate complexes containing trans-dioxo uranium(VI) (uranyl) groups has been isolated in good yield by reaction of UO22+ with [NaAs4W40O140]27− (W40) in aqueous solution. The “lacunary” anion, [(UO2)3(H2O)5As3W29O104]19−1 is formed by the reaction of W40 with UO2(MeCO2)2 at pH 7…
New perylene–porphyrin dyads have been designed that exhibit superior light-harvesting and energy-utilization activity compared with earlier generations of structurally related dyads. The new dyads consist of a perylene mono(imide) dye (PMI) connected to a porphyrin (Por) via an ethynylphenyl (ep) linker. The PMI–ep–P…
The [X − (X + N)] electron density distribution in a 3D ferromagnetic purely organic free radical, p-(methylthio)phenyl nitronyl nitroxide, is reported and analysed in terms of magnetic interactions. From the atomic charges obtained by multipolar refinement against the X-ray data, a charge transfer by intermolecular h…
To minimize compliance mismatch between native artery and arterial graft prosthesis over the entire pressure regions, we proposed a coaxial double tubular artificial graft which consists of an enhanced compliant inner tube and a less compliant outer tube, both of which were fabricated using well-controlled multiply mi…
The thermal conductivity of 10 mm thick low density polyethylene foam sheets cut from a block produced by a compression molding process has been studied in the temperature range between 24°C and 50°C. The cellular structure and the matrix polymer morphology have also been characterized to find out the main microscopic…
Chemical modification of Ar plasma-pretreated poly(tetrafluoroethylene) (PTFE) film by UV-induced graft copolymerization with glycidyl methacrylate (GMA), followed by reactive coupling of 3-aminopropyltriethoxysilane (APS), or reactive immobilization of polyaniline (PANI) chains had been carried out to improve the adh…
The stability of bassanite and the mechanism of dehydration of natural gypsum were investigated by in situ micro-Raman spectroscopy in the temperature range 300–380 K and 300–450 K. From the thermal evolution of the sulphate (940–1200 cm) and water (3250– 3750 cm) molecular stretching (ν1 and ν3) modes, it was evident…
Liquid dewetting, physical confinement, and attractive capillary forces have been combined to assemble monodispersed spherical colloids into complex, zigzag aggregates characterized by well-defined internal structures and tightly controlled lengths.
We report the effect of the concentration of hydroxide ion adsorbed on indium tin oxide (ITO) in the electrodeposition of zinc oxide (ZnO) by potential modulation method. We found that by applying an optimal constant potential of −0.72 V, X-ray diffraction (XRD) peak intensity of crystalline phase indicating ZnO (100)…