Irradiation‐Wavelength Directing Circularly Polarized Luminescence in Self‐Organized Helical Superstructures Enabled by Hydrogen‐Bonded Chiral Fluorescent Molecular Switches
- 21 September 2021
- journal article
- research article
- Published by Wiley in Angewandte Chemie
- Vol. 60 (52), 27158-27163
- https://doi.org/10.1002/anie.202111344
Abstract
Two novel light-driven chiral fluorescent molecular switches, (R,S,R)-switch 1 and (R,S,R)-switch 2 , are prepared by means of hydrogen-bonded (H-bonded) assembly of a photoresponsive (S) chiral fluorescent molecule respectively with a cyano substitution at different positions as an H-bond acceptor and an opposite (R) chiral molecule as an H-bond donor. The resulting two switches exhibit tunable and reversible Z/E photoisomerization irradiated with 450 nm blue and 365 nm UV light. When doped into an achiral liquid crystal, both switches are found to be able to form a CPL tunable luminescent helical superstructure. Interestingly, in contrast to the tunable CPL characteristics of the system incorporating switch 2, exposure of the system incorporating switch 1 to 365 nm and 450 nm radiation can lead to controllable different photostationary CPL behavior, including switching-off and polarization inversion. In addition, optical information coding was demonstrated using the system containing switch 1.Keywords
Funding Information
- National Natural Science Foundation of China
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