Oxoalkoxides?True precursors of complex oxides

Mixed‐Ligand Titanium “Oxo Clusters”: Structural Insights into the Formation and Binding of Organic Molecules and Transformation into Oxide Nanostructures on Hydrolysis and Thermolysis

“…Titanium oxo complexes can be synthesized hydrolytically by the addition of water. For example, Day 9 (OMe), from titanium(IV) isopropoxide, adding H 2 O and MeOH in 2-propanol. [29] Water can also be generated in situ by an esterification reaction between an alkoxide and a carboxylic acid, [6,30] or by condensation of titanium(IV) alkoxides with ketones.…”

“…Understanding that oxo complexes are true precursors of oxide materials, and that they are potential models for the nucleation of oxide phases in the sol–gel process, as well as being models for the surface structure of oxide particles, has become one of the strongest sources of recent interest regarding the structure and reactivity of these compounds. Valuable insights have been obtained into the structure of heterogeneous titania‐based catalysts and into the surface structure and reactivity of hybrid TiO 2 ‐based adsorbents .…”

“…The corresponding hybrids have been produced through the polymerization of unsaturated organic ligands under anhydrous conditions. [7,8] Understanding that oxo complexes are true precursors of oxide materials, [9] and that they are potential models for the nucleation of oxide phases in the sol-gel process, [10] as well as being models for the surface structure of oxide particles, [11] has become one of the strongest sources of recent interest regarding the structure and reactivity of these compounds. Valuable insights have been obtained into the structure of heterogeneous titania-based catalysts [12][13][14] and into the surface structure bility towards hydrolysis, contrary to the widespread belief that titanium oxo complexes are water-stable, and demonstrate that it transforms into titania (anatase) on contact with water.…”

Oxochloroalkoxide of the Cerium (IV) and Titanium (IV) as oxides precursor

“…Considering this behavior and also the low solubility demonstrated by the heterometallic species in many solvents tested, a polymeric arrangement could be expected for the compound. Normally, the monometallic and bimetallic alkoxides are soluble in the organic solvents, although their nuclearities are significantly low 9,11 . The compound does not reveal any hygroscope characteristic, when isolated in the Schlenk tube, under argon atmosphere and at room temperature.…”

“…Metal alkoxides and oxochloroalkoxides are versatile precursors to the oxides. The attractive properties of the alkoxides, concerning their use as precursor materials, are the solubility, sublimation facility and thermal stability 2,[9][10][11] . The M-O-C bond polarity and the polymerization degree mainly govern their solubility and volatility.…”