Journal
TETRAHEDRON
Volume 73, Issue 33, Pages 4913-4917Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2017.05.026
Keywords
Photochromic switches; Supramolecular chemistry; Dynamic molecular systems
Categories
Funding
- European Research Council [307784]
- Dutch Science Foundation [NWO Aspasia 015.007.007]
- European Research Council (ERC) [307784] Funding Source: European Research Council (ERC)
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Azobenzene is a widely used guest molecule to build up dynamic photo-responsive host-guest systems. Here, we studied the host-guest complexation of a water-soluble, ortho-fluorinated azobenzene with two different host molecules, a cyclodextrin (beta-CD) and a cucurbit[8]uril (CB[8]), and demonstrate that in the presence of both, the guest forms two stable supramolecular complexes selectively. In its trans-form, it favors binding to beta-CD, whereas in its cis-form it favors complexation to CB[8]. Upon light-triggered photo-isomerization, the photoswitch was reversibly and selectively transferred from one host cavity to the other. This light-driven host exchange provides a new tool for supramolecular systems. (C) 2017 The Authors. Published by Elsevier Ltd.
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