文献类型：期刊文献

英文题名：Enabling Light Work in Helical Self-Assembly for Dynamic Amplification of Chirality with Photoreversibility

作者：Cai, Yunsong[1,2];Guo, Zhiqian[1,2];Chen, Jianmei[3];Li, Wenlong[1,2];Zhong, Liubiao[3];Gao, Ya[6];Jiang, Lin[3];Chi, Lifeng[3,4,5];Tian, He[1,2];Zhu, Wei-Hong[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China;[4]Univ Munster, Inst Phys, D-48149 Munster, Germany;[5]Univ Munster, Ctr Nanotechnol CeNTech, D-48149 Munster, Germany;[6]Shanghai Univ Engn Sci, Coll Fundamental Studies, Shanghai 201620, Peoples R China

年份：2016

卷号：138

期号：7

起止页码：2219

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20161002045510);WOS:【SCI-EXPANDED(收录号:WOS:000371103900034)】；

基金：This work was supported by National 973 Program (no. 2013CB733700), NSFC for Creative Research Groups (21421004) and Distinguished Young Scholars (21325625), NSFC/China, the Oriental Scholarship, Science and Technology Commission of Shanghai Municipality (15XD1501400), and the Fundamental Research Funds for the Central Universities (WJ1416005).

语种：英文

外文关键词：Hydrogen bonds - Chirality - Light

摘要：Light-driven transcription and replication are always subordinate to a delicate chirality transfer. Enabling light work in construction of the helical self-assembly with reversible chiral transformation becomes attractive. Herein we demonstrate that a helical hydrogen-bonded self-assembly is Open form Closed form reversibly photoswitched between photochromic open and closed forms upon irradiation with alternative UV and visible light, in which molecular chirality is amplified with the formation of helixes at supramolecular level. The characteristics in these superhelixes such as left-handed or right-handed twist and helical length, height, and pitch are revealed by SEM and AFM. The helical photoswitchable nanostructure provides an easily accessible route to an unprecedented photoreversible modulation in morphology, fluorescence, and helicity, with precise assembly/disassembly architectures similar to biological systems such as protein and DNA.