ARYLSILSESQUIOXANE GELS AND RELATED MATERIALS - NEW HYBRIDS OF ORGANIC AND INORGANIC NETWORKS
ARYLSILSESQUIOXANE GELS AND RELATED MATERIALS - NEW HYBRIDS OF ORGANIC AND INORGANIC NETWORKS
复制标题
DOI：
10.1021/ja00043a014
复制
发表时间：
1992-08-12
影响因子：
15
通讯作者：
WEBSTER, O
中科院分区：
文献类型：
--
作者：
SHEA, KJ;LOY, DA;WEBSTER, O
合成了用于制备无定形有机-无机杂化网络材料的分子结构单元。双（三乙氧基甲硅烷基）芳基1-4和-乙炔基5单体的水解和缩合导致以干凝胶形式形成芳基-和乙炔基-桥接的聚倍半硅氧烷。凝胶是由直径在50和80 nm之间的颗粒的均匀聚集体组成的玻璃状材料。用原子力显微镜研究了苯基桥联聚倍半硅氧烷的细颗粒聚集体特征。芳基桥接的材料是微孔的，表面积高达1000 m2/g，在空气中热稳定至400 ℃。使用固态C-13和Si-29 NMR光谱评估芳基和乙炔基桥的完整性，并测定网络材料中的水解度（半定量）和缩合度。
Molecular building blocks for the preparation of amorphous hybrid organic-inorganic network materials have been synthesized. Hydrolysis and condensation of bis(triethoxysilyl)aryl 1-4 and -ethynyl 5 monomers results in formation of aryl- and ethynyl-bridged polysilsequioxanes in the form of xerogels. The gels were glasslike materials composed of uniform aggregates of particles between 50 and 80 nm in diameter. Atomic force microscopy was used to examine the fine grained aggregate characteristics of phenyl-bridged polysilsesquioxanes. The aryl-bridged materials were microporous with surface areas as high as 1000 m2/g and thermally stable to 400-degrees-C in air. Solid state C-13 and Si-29 NMR spectroscopies were used evaluate the integrity of the aryl and ethynyl bridges and to determine the degrees of hydrolysis (semiquantitative) and condensation in the network materials.