Submolecular Observation of Photosensitive Macrocycles and Their Isomerization Effects on Host-Guest Network

被引：107
作者：
Shen, Yong-Tao [1 ]
Guan, Li [1 ]
Zhu, Xiao-Yang [1 ]
Zeng, Qing-Dao [1 ]
Wang, Chen [1 ]
机构：
[1] NCNST, Beijing 100190, Peoples R China
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 17期
基金：
中国国家自然科学基金;
关键词：
SHAPE-PERSISTENT MACROCYCLES; CIS-TRANS ISOMERIZATION; SCANNING-TUNNELING-MICROSCOPY; PHOTORESPONSIVE CROWN ETHERS; LIQUID-SOLID INTERFACE; BINDING ABILITY; AZOBENZENE; TEMPLATE; STM; MOLECULE;
D O I：
10.1021/ja808434n
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The macrocyclic compounds consisting of photosensitive units as parts of the frame have been extensively studied to mimic photoregulated functions in nature. In this paper, controlled assembly of well-ordered arrays of photosensitive macrocyclic rectangles is demonstrated by using a host-guest molecular template. 4NN-Macrocycle molecules are observed to photoisomerize from trans-trans-trans-trans (t,t,t,t) to a range of isomers including trans-trans-trans-cis (t,t,t,c) and trans-cis-trans-cis (t,c,t,c) isomers after irradiation of UV light. The photoisomers are also observed to affect the guest-host network characteristic appreciably. In the STM observations we can distinguish three (t,t,t,t) conformational isomers, three (t,t,t,c) conformational isomers, and one (t,c,t,c) isomer, which self-assemble into different adlayers with TCDB on a HOPG surface. This study provides a facile approach to study the photoisomerization processes of the azobenzene groups and the conformational photoisomers.
引用
收藏
页码：6174 / 6180
页数：7
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