New perspectives in the tailoring of hetero (bi- and tri-) metallic alkoxide derivatives

Structure, photochemistry and applications of metal-doped polyoxotitanium alkoxide cages.

Designed synthesis and molecular structure of the first heterotermetallic alkoxide

From a monomeric bismuth silanolate to a molecular bismuth oxo cluster: [Bi22O26(OSiMe2tBu)14].

Investigation of the solvent and alkoxide precursor effect on the nonhydrolytic sol-gel synthesis of oxide nanoparticles by means of an ether elimination (Bradley) reaction indicates that the best crystallinity of the resulting oxide particles is achieved on application of aprotic ketone solvents, such as acetophenone, and of smallest possible alkoxide groups. The size of the produced primary particles is always about 5 nm caused by intrinsic mechanisms of their formation. The produced particles, possessing the composition of natural highly insoluble minerals, are biocompatible. Optical characteristics of the perovskite complex oxide nanoparticles can easily be controlled through doping with rare earth cations; for example, by Eu(3+). They can be targeted through surface modification by anchoring the directing biomolecules through a phosphate or phosphonate moiety. Testing of the distribution of Eu-doped BaTiO(3) particles, modified with ethylphosphonic acid, demonstrates their facile uptake by the plants with active fluid transport, resulting finally in their enhanced concentration within the cell membranes.

Precursor and solvent effects in the nonhydrolytic synthesis of complex oxide nanoparticles for bioimaging applications by the ether elimination (Bradley) reaction.

This review covers the works on the sol-gel preparation of oxides from metal alkoxides that were carried out at the Faculty of Chemistry, Moscow State University, and at the Karpov Research Institute of Physical Chemistry. The composition and properties of the oxide powders and films prepared were considered in relation to the nature of alkoxides and solvents and complex formation in solution. The morphology and phase composition of the powders were examined in relation to hydrolysis conditions. Electrical and optical data are presented for titanate, zirconate, niobate, and tantalate powders, ceramics, and films

Preparation of oxide materials from metal alkoxides

The X-ray single-crystal studies of [M{Ti2(OR)9}2](M = Ca, Ba; R = Et) obtained from EtOH solutions in 1 : 4 metal–titanium ratios show that these complexes, both in the solid state and in solution, are composed of symmetric molecules, in which the central eight-coordinated metal atom is bound to two face-sharing bioctahedral [Ti2(OR)9] groups.

The synthesis, crystal and molecular structures of bimetallic ethoxides of barium and titanium, and calcium and titanium: [M{Ti2(µ3-OEt)2(µ-OEt)3(OEt)4}2](M = Ca, Ba)

E. P. Turevskaya

Papers

Preparation of oxide materials from metal alkoxides

The synthesis, crystal and molecular structures of bimetallic ethoxides of barium and titanium, and calcium and titanium: [M{Ti2(µ3-OEt)2(µ-OEt)3(OEt)4}2](M = Ca, Ba)

Synthesis of crystalline bismuth oxide by hydrolysis of bismuth ethoxide

The Alkoxides of Molybdenum, Tungsten and Vanadium and their Hydrolysis Products

Preparation of Oxide Materials from Metal Alkoxides