Formation of silica nanotubes through a TPPS J aggregates template  

作　　者：ZHANG Li JIANG Jian LIU MingHua 

机构地区：[1]Beijing National Laboratory for Molecular Science,CAS Key Laboratory of Colloid,Interface and Chemical Thermodynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]National Center for Nanoscience and Technology,Beijing 100190,China

出　　处：《Chinese Science Bulletin》2012年第33期4322-4327,共6页

基　　金：supported by the National Basic Research Program of China (2009CB930802);the National Natural Science Foundation of China(91027042,21021003);the Fund of the Chinese Academy of Sciences

摘　　要：It is found that 5,10,15,20-tetrakis(4-sulfonatophenyl) porphyrin(TPPS),which is known to form J aggregates in water under low pH value,acts as a template for the hydrolyzing of organosilane.The nanotube structures of silica with 4 8 nm inner diameters are obtained,which is consistent with the height of TPPS J aggregates,indicating that TPPS J aggregates are indeed acting as the template for the sol-gel transcription.The TPPS J aggregation disappear when the medium pH value is shifted from acidic to basic,consequently formed silica nanostructures are amorphous nanosphere rather than nanofiber structures.In contrast,the copper phthalocyanine(TSCuPc),which does not exist as linear J aggregates,cannot induce the silica to form one dimensional nanofiber structures,implying that the templating effect of TPPS J aggregates for inorganic nanostructures.It is found that 5,10,15,20-tetrakis （4-sulfonatophenyl） porphyrin （TPPS）, which is known to form J aggregates in water under low pH value, acts as a template for the hydrolyzing of organosilane. The nanotube structures of silica with 4-8 nm inner diameters are obtained, which is consistent with the height of TPPS J aggregates, indicating that TPPS J aggregates are indeed acting as the template for the sol-gel transcription. The TPPS J aggregation disappear when the medium pH value is shifted from acidic to basic consequently formed silica nanostructures are amorphous nanosphere rather than nanofiber structures. In contrast, the copper phthalocyanine （TSCuPc）, which does not exist as linear J aggregates, cannot induce the silica to form one dimensional nanofiber structures, implying that the templating effect of TPPS J aggregates for inorganic nanostructures.

关 键 词：TPPS 二氧化硅 模板作用 硅纳米管 聚集体 纳米管结构 硅纳米结构 低PH值 

分 类 号：TB383.1[一般工业技术—材料科学与工程]