二芳基乙烯自组装体系中从螺旋纳米纤维到螺旋纳米管的形态转变

The morphology transformation from helical nanofiber to helical nanotube in a diarylethene self-assembly system.

作者信息

Duan Yulong, Yan Shihai, Zhou Xinhong, Xu Wei, Xu Hongxia, Liu Zhihong, Zhang Lixue, Zhang Chuanjian, Cui Guanglei, Yao Lishan

机构信息

Qingdao Key Lab of Solar Energy Utilization and Energy Storage Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.

出版信息

Chem Commun (Camb). 2014 Aug 7;50(61):8335-8. doi: 10.1039/c4cc02580f.

DOI:10.1039/c4cc02580f

PMID:24940732

Abstract

A helical nanostructure can be obtained by self-assembly of a diarylethene derivative that bears two malononitrile substitutes in a tetrahydrofuran/water medium. It is revealed that the helical nanostructure changed from helical nanofiber to helical nanotube when the diarylethene monomer changed from the open-ring isomer to the closed-ring isomer upon irradiation with 365 nm ultraviolet light, meanwhile, the helix angle of the nanostructure changed from 50° ± 5° to 75° ± 5°. There is a great possibility that the helical nanofibers and helical nanotubes are assembled from dimers as base units based on theoretical calculation and experimental results.

摘要

通过在四氢呋喃/水介质中自组装带有两个丙二腈取代基的二芳基乙烯衍生物，可以获得一种螺旋纳米结构。研究表明，当二芳基乙烯单体在365 nm紫外光照射下从开环异构体转变为闭环异构体时，螺旋纳米结构从螺旋纳米纤维转变为螺旋纳米管，同时，纳米结构的螺旋角从50°±5°变为75°±5°。基于理论计算和实验结果，螺旋纳米纤维和螺旋纳米管很有可能是由二聚体作为基本单元组装而成的。