Silica-based and transition metal-based inorganic-organic hybrid materials - A comparison

被引:65
|
作者
Schubert, U [1 ]
机构
[1] Vienna Univ Technol, Inst Mat Chem, A-1060 Vienna, Austria
关键词
precursor chemistry; functional groups; inorganic-organic hybrid materials; metal oxide clusters; polymers;
D O I
10.1023/A:1020729100148
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Organically substituted metal alkoxides can be prepared by reaction of the parent alkoxides with complexing organic compounds. The chemical and structural consequences of such substitutions are discussed in this article. Examples are given showing how functional organic moieties, such as polymerizable groups, can be incorporated into sol-gel materials via the complexing ligands. Major structural differences between silica-based and metal-based hybrid materials originate from the different charge/coordination number ratios of silicon and most metals. This results in a high tendency for the molecular building blocks to aggregate. In many cases, metal oxide clusters are formed which are capped by the organic ligands. Such surface-modified clusters are themselves very valuable condensed matter units for materials syntheses.
引用
收藏
页码:47 / 55
页数:9
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