Volume 60, Issue 52 pp. 27158-27163
Research Article

Irradiation-Wavelength Directing Circularly Polarized Luminescence in Self-Organized Helical Superstructures Enabled by Hydrogen-Bonded Chiral Fluorescent Molecular Switches

Yanrong He

Yanrong He

Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work.

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Dr. Shu Zhang

Dr. Shu Zhang

Institute of Advanced Materials, School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University, Nanjing, 211189 China

These authors contributed equally to this work.

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Dr. Hari Krishna Bisoyi

Dr. Hari Krishna Bisoyi

Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio, 44242 USA

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Jinghui Qiao

Jinghui Qiao

Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Hong Chen

Hong Chen

Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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JingJing Gao

JingJing Gao

Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Prof. Jinbao Guo

Corresponding Author

Prof. Jinbao Guo

Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Prof. Quan Li

Corresponding Author

Prof. Quan Li

Institute of Advanced Materials, School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University, Nanjing, 211189 China

Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio, 44242 USA

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First published: 21 September 2021
Citations: 118

Graphical Abstract

Phototuning the turning-off and the polarization inversion of circularly polarized luminescence signals is obtained in the corresponding photostationary state of the same helical cholesteric superstructure constructed from the light-driven hydrogen bonded chiral fluorescent molecular switch, which derives from the different conversion ratio of Z/E photoisomerization of the switch upon different light irradiations.

Abstract

Two 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. 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 is demonstrated using the system containing switch 1.

Conflict of interest

The authors declare no conflict of interest.

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