Periodic mesoporous dendrisilicas

2019-08-14 10:23:17

template mesoporous dendrimers Toronto dendrisilica

责任者: Landskron, Kai;Ozin, Geoffrey A. 单位: Materials Chemistry Research Group, Department of Chemistry, University of Toronto, Toronto, Ont. M5S 3H6, Canada 来源出处: Science,2004,306(5701):1529-1532 摘要: We report the synthesis of a new class of materials called periodic mesoporous dendrisilicas. They are prepared from dendrimers with trialkoxysilyl groups at the outmost shell. Dendrimers of various cores and numbers of shells are used. The dendrisilica synthesis is based on acid- or base-catalyzed hydrolysis of the trialkoxysilyl groups and subsequent template-directed condensation of the dendrimers into an ordered template-dendrisilica nanocomposite. The template can be removed with organic solvents, producing a periodic mesoporous dendrisilica whose pore walls consist of interconnected dendrimer building blocks. 关键词: Dendrimers;Hydrolysis;Condensation;Nanostructured materials;Dendrisilica;Pore wells;Building blocks