Organosilsesquioxane-titanium oxide hybrids by nonhydrolytic sol-gel processes. Study of the rearrangement of Si-O-Ti bonds

被引：26

作者：

Crouzet, L ^{[1
]}

Leclercq, D ^{[1
]}

Mutin, PH ^{[1
]}

Vioux, A ^{[1
]}

机构：

[1] Univ Montpellier 2, UMR 5637, F-34095 Montpellier 5, France

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 07期

关键词：

D O I：

10.1021/cm020985e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Organosilsesquioxane-titanium oxide hybrids were prepared by nonhydrolytic condensation between CH(3)SiX(3) and 3/4TiY(4) (with X = Cl, Y = O(i)Pr or X = OR, Y = Cl). The two routes led to hybrids in quantitative yield without formation of Si-O-Ti bonds. The lack of Si-O-Ti bonds may be due to greater rates of homocondensation of the mixture of methylchloroalkoxysilanes and titanium chloride alkoxide initially formed by redistribution reactions and/or to the instability of the Si-O-Ti bonds, which underwent redistribution reactions to form Si-O-Si and Ti-O-Ti bonds. The intermediate formation of Si-O-Ti bonds by redistribution was indirectly evidenced in solution. The heterogeneity of the hybrids has been related mainly to this instability.

引用

页码：1530 / 1534

页数：5

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