通过可逆包封对荧光进行超分子控制。

Supramolecular control of fluorescence through reversible encapsulation.

机构信息

Department of Chemistry, Allegheny College, 520 North Main Street, Meadville, Pennsylvania 16335-3902, USA.

出版信息

J Am Chem Soc. 2010 Jul 28;132(29):9984-5. doi: 10.1021/ja103912a.

PMID:20608653

Abstract

The trans to cis isomerization of 4,4'-dimethylazobenzene by the nonchemical stimuli light and heat alters its guest binding properties, allowing control over encapsulation of a second guest. We show here how this remote control for reversible encapsulation can be used as a supramolecular fluorescence on/off switch. If trans-4-ethyl-4'-methylstilbene is used as the second guest its fluorescence is altered depending on whether it is free in solution or encapsulated. We demonstrate that the change in fluorescence is indeed a consequence of the controlled encapsulation state of the stilbene by correlation of fluorescence and (1)H NMR data.

摘要

4,4'-二甲基偶氮苯的顺反异构化由非化学刺激光和热引起，改变了其客体结合性质，允许控制第二个客体的包封。我们在这里展示了这种对可逆封装的远程控制如何可用作超分子荧光开/关开关。如果使用反式-4-乙基-4'-甲基二苯乙烯作为第二个客体，则其荧光会根据其在溶液中是否游离或包封而改变。我们通过荧光和（1）H NMR 数据的相关性证明，荧光的变化确实是二苯乙烯受控包封状态的结果。