Metal alkoxides - models for metal oxides. 1. Preparations and structures of hexadecaalkoxytetratungsten compounds, W4(OR)16, where R = Me and Et, and octaoxotetraisopropoxytetrapyridinotetramolybdenum, Mo4(O)4(.mu.-O)2(.mu.3-O)2(O-i-Pr)2(.mu.-O-i-Pr)2(py)4

1981 ◽  
Vol 103 (20) ◽  
pp. 6093-6099 ◽  
Author(s):  
M. H. Chisholm ◽  
J. C. Huffman ◽  
C. C. Kirkpatrick ◽  
J. Leonelli ◽  
K. Folting
Keyword(s):  
Metal Oxides ◽  
Metal Alkoxides

Hybrid Nanocomposites Based on Metal Oxides and Polysiloxanes with Controlled Morphology

2007 ◽  
Vol 1007 ◽  
Author(s):  
Sorin Ivanovici ◽  
Christoph Rill ◽  
Claudia Feldgitscher ◽  
Guido Kickelbick
Keyword(s):  
Metal Oxides ◽  
Sol Gel ◽  
Hybrid Nanocomposites ◽  
Hybrid Nanoparticles ◽  
Spectroscopic Methods ◽  
Metal Alkoxides ◽  
Transmission Electron ◽  
Sol Gel Process ◽  
Ft Ir ◽  
Controlled Morphology

ABSTRACTHybrid materials based on polysiloxanes and metal oxides (SiO2, TiO2, ZrO2) were prepared by hydrosilation of allyl acetoacetate (AAA) modified metal alkoxides (M(OR)4; M = Ti, Zr; R = ethyl, isopropyl) or vinyl triethoxysilane with poly(dimethylsiloxane-co-hydrosiloxane) (PDMS-co-PMHS). The obtained compounds acted as single-source precursors in the sol-gel process. Various spectroscopic methods showed the complete functionalization of the polysiloxane chains with the complexes. When alcohols were used as solvents in the sol-gel process, hybrid nanoparticles were obtained, as observed by dynamic light scattering (DLS) measurements, transmission electron microscopy (TEM), and spectroscopic methods such as NMR and FT-IR.

Metal alkoxides: models for metal oxides. 7. Trinuclear and tetranuclear alkylidyne clusters of tungsten supported by alkoxide ligands

1985 ◽  
Vol 107 (5) ◽  
pp. 1234-1241 ◽  
Author(s):  
Malcolm H. Chisholm ◽  
Kirsten Folting ◽  
Joseph A. Heppert ◽  
David M. Hoffman ◽  
John C. Huffman
Keyword(s):  
Metal Oxides ◽  
Metal Alkoxides ◽  
Alkoxide Ligands

Novel Preparation of Nano-Sized TiO2 and ZrO2 Particles by Nanocasting with Nanoporous SiO2 and Selective Dissolution

2007 ◽  
Vol 124-126 ◽  
pp. 643-646
Author(s):  
Jun Lee ◽  
Yoshihiro Sugi ◽  
Nam Jo Jeong ◽  
Gon Seo ◽  
Sung June Cho
Keyword(s):  
Metal Oxides ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Selective Dissolution ◽  
Metal Alkoxides ◽  
Nanocrystalline Metal

High surface area and uniform nano-sized TiO2 and ZrO2 were prepared readily by the infiltration of metal alkoxides into the nanoporous SiO2, SBA-15 and the following selective dissolution of SiO2. The obtained particles of TiO2 and ZrO2, 8.1 nm were nanocrystalline of which the structure were anatase and tetragonal, respectively. The surface area and pore volume of the nanocrystalline metal oxides can be increased to above 200 m2g-1 and 0.30 cm3g-1, respectively.

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