Materials Literature
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This chapter considers thermal spin crossover occurring in transition metal compounds other than those of Fe(II), Fe(III) and Co(II). Unusual magnetic properties of several coordination and organometallic complexes of Mn(II), Mn(III), Cr(II) and Co(III) are discussed in the light of their structural features.
Brief Table of Contents. Graphical Abstracts for the Experiments. 1. INTRODUCTION. 2. IDENTIFICATION AND EVALUATION OF CHEMICAL HAZARDS. 3. CHEMICAL EXPOSURE AND ENVIRONMENTAL CONTAMINATION. 4. SOURCES OF INFORMATION ABOUT CHEMICAL HAZARDS. 5. INTRODUCTION TO GREEN CHEMISTRY. 6. ALTERNATIVE SOLVENTS. 7. ALTERNATIVE RE…
Highly ordered large pore SBA-15 silica functionalized with up to 16% aminopropyl groups, which gave high catalytic activity and selectivity toward flavanone synthesis through aldol condensation and subsequent intramolecular Michael addition of benzaldehyde and 2'-hydroxyacetophenone, was synthesized for the first tim…
The possibility of fabricating a highly regular nanohole array using different acid mixtures for the anodic oxidation of aluminum was investigated. The regularity of a nanohole array formed using a 1:1 sulfuric/oxalic acid mixture was quantified. Excellent regularity was obtained at around an anode voltage of 32 to 36…
This paper deals with the analysis of structural and electronic effects of size in quasi-stoichiometric CeO2 nanoparticles prepared by a microemulsion method. The preparation method yields highly controlled materials in terms of particle size distribution and chemical oxidation state, with the presence of Ce(III) spec…
A class of layered double hydroxides with the layer composition [MAl4(OH)12](NO3)2·xH2O, where M = Zn, Cu, Ni and Co, has been synthesised for the first time and its anion exchange chemistry explored. These materials are related to the minerals chalcoalumite, mbobomkulite and nickelalumite (see M. Fleischer, R. G. Bur…
Polypyrrole (PPy) nanotubes with highly uniform surface and tunable wall thickness were fabricated by one-step vapor deposition polymerization (VDP) using anodic aluminium oxide (AAO) template membranes, and transformed into carbon nanotubes through a carbonization process.
An infiltration method for preparing a boron carbide‐aluminum (B 4 C‐AI) composite was modified so as to reduce the processing temperature and time. Titanium metal and titanium‐based compounds were added to B 4 C powders to enhance the wettability of the liquid aluminum on boron carbide skeletons. As expected, the tim…
We have prepared functional TiO2@CdS core/sheath heterostructure nanowires using a simple chemical reduction method at room temperature. The core/sheath nanowires were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV-visible spectroscopic techn…
The interaction of six aryl-linked bis-beta-diketones, including a new naphthylene linked species, with copper(II), iron(III) and, in one instance gallium(III), has been investigated with the aim of obtaining metallo-supramolecular assemblies exhibiting different geometries. New examples of two assembly types incorpor…
This review outlines the recent developments in uncovering the enzymes and intermediates involved in fluorometabolite biosyntheses in the bacterium Streptomyces cattleya. A particular emphasis is placed on the purification and characterisation of the fluorinase, the C-F bond forming enzyme which initiates the biosynth…
The cationic cyclen based Eu(III)-phen conjugated 1.Eu was synthesised as a chemosensor for Cu(II), where the recognition in water at pH 7.4 gave rise to quenching of the Eu(III) luminescence and the formation of tetranuclear polymetallic Cu(II)-Eu(III) macrocyclic complexes in solution where Cu(II) was bound by three…
Ultralow carbon interstitial free (IF) steel was severely deformed up to a strain of 5.6 by the Accumulative Roll-bonding (ARB) process at 773 K. Crystallographic analysis by electron back-scattering diffraction (EBSD) technique in a field-emission type scanning electron microscope (FE-SEM) was carried out for the ARB…
Soft X-ray (200 to 1000 eV) absorption spectroscopy at the O K-edge and the metal -edges, in both the fluorescence yield (FY) and the partial electron yield (PEY) mode, has been used to probe the electronic structure of electrochemically deintercalated FY and PEY spectra of the transition metal -edges, indicated that…
Lithium zirconate, Li 2 ZrO 3 , has been reported as a candidate material for high‐temperature CO 2 separation. The reaction of Li 2 ZrO 3 with CO 2 is extremely fast, and the material can store significant quantities of CO 2 at high temperature. The reacted CO 2 can be regenerated by thermal cycling. Alternatively, a…
Palladium catalysed intramolecular cyclisations on meso-phenyl porphyrins give access to a range of substituted porphyrins in which one or two of the phenyl ortho-carbons are bonded directly to an adjacent β-pyrrolic position.
Assembly of Fe(II), 3-cyanopyridine and [Au(CN)2](-) affords, in one-pot reaction, three coordination polymers that represent a genuine example of supramolecular isomerism with strong influence in the spin crossover regime of the Fe(II) ions.
This review describes recently introduced methods of coating colloidal particles and fabrication of hollow multilayer polyelectrolyte capsules. Diffusion through multilayer, Donnan equilibria for ions inside and outside hollow spheres and mechanical properties are given in quantitative aspects.
Abstract Carbon nanofibers of ca. 1 μm by 20 nm dimensions have been successfully prepared by an improved route, consisting of the graphitization of polyacrylonitrile (PAN) previously formed inside the nanosized pores of sepiolite. This natural microfibrous silicate contains structural tunnels extending along the whol…
High-quality CdS, ZnS and alloyed ZnxCd1 − xS nanocrystals are synthesized in the commonly available coordinating solvent, high boiling-point long-chain amines, using the corresponding metal salts (such as metal stearate, acetate, chloride, sulfate etc.) and elemental sulfur as the precursors. The obtained CdS and all…