制备介孔二氧化硅纳米带过程中的手性反转

Handedness inversion in preparing mesoporous silica nanoribbons.

作者信息

Chen Yuanli, Guo Yongmin, Zhao Huanyu, Bi Lifeng, Pei Xianfeng, Li Baozong, Yang Yonggang

机构信息

Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Suzhou (Soochow) University, Suzhou 215123, People's Republic of China.

出版信息

Nanotechnology. 2008 Sep 3;19(35):355603. doi: 10.1088/0957-4484/19/35/355603. Epub 2008 Jul 21.

DOI:10.1088/0957-4484/19/35/355603

PMID:21828854

Abstract

A new chiral cationic amphiphile has been synthesized. Sol-gel transcriptions were carried out to control mesoporous silica nanostructures using the organic self-assemblies of this amphiphile as templates. Left-handed coiled mesoporous silica nanoribbons were obtained in the mixture of 1-propanol and 2.5 wt% NH(3) aq. at the ratio of 2:8 and 0 °C. However, right-handed coiled mesoporous silica nanoribbons were prepared in 2.5 wt% NH(3) aq. at 25 °C. The organization of the low-molecular-weight gelators plays an important role in this handedness inversion.

摘要

一种新型手性阳离子两亲物已被合成。以这种两亲物的有机自组装体为模板，通过溶胶 - 凝胶转录来控制介孔二氧化硅纳米结构。在1 - 丙醇和2.5 wt%氨水的混合物中，于2:8的比例和0°C条件下获得了左旋螺旋介孔二氧化硅纳米带。然而，在25°C的2.5 wt%氨水中制备出了右旋螺旋介孔二氧化硅纳米带。低分子量凝胶剂的组装在这种手性反转中起着重要作用。