1,2-亚乙基氧化硅螺旋纳米管在制备过程中的手性反转

Handedness Inversion in Preparing Helical 1,2-Ethylene-silica Nanotubes

以D-缬氨酸为手性源合成了手性阴离子两亲性小分子化合物D-C12ValC10COONa.用圆二色谱表征了该化合物在溶液和胶体中的自组装行为.通过溶胶-凝胶复制法,以该手性化合物和结构助剂3-(三甲氧基硅基)丙胺的组装体为模板,制备了左手螺旋1,2-亚乙基氧化硅纳米管.扫描电镜和透射电子显微镜研究显示,调节溶液浓度和pH值可以控制1,2-亚乙基氧化硅纳米管的手性,而温度和溶剂配比的改变对纳米管手性并无影响.

A chiral anionic amphiphilic compound derived from D-valine was synthesized. The self-assembly behavior of this compound in solution and in gel was studied using circular dichroism. Helical 1,2-ethylenesilica nanotubes were obtained through a sol-gel transcription method using the assembly of this chiral com- pound as template and a co-structure-directing agent, 3-aminopropyhrimethoxysilane. It was found that the handedness of 1,2-ethylene-silica nanotubes can be controlled by tuning the concentration and pH value of the reaction mixture. However, the reaction temperature and water/ethanol volume ratio in the reaction mixture did not affect the handedness of the nanotubes.