Self‐Inclusion Complexation of Electron‐Accepting Guest into Electron‐Donating Cyclic Host by Photoexcitation

Author:

Wada Keisuke1,Nagata Yuuya2,Cui Luxia3,Ono Toshikazu34,Akine Shigehisa56,Ohtani Shunsuke1,Kato Kenichi1ORCID,Fa Shixin17,Ogoshi Tomoki16ORCID

Affiliation:

1. Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan

2. WPI Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University, Kita 21 Nishi 10, Kita-ku Sapporo 001-0021 Japan

3. Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University, 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan

4. Center for Molecular Systems (CMS) Kyushu University, 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan

5. Graduate School of Natural Science and Technology Kanazawa University, Kakuma-machi, Kanazawa Ishikawa 920-1192 Japan

6. WPI Nano Life Science Institute (WPI-NanoLSI) Kanazawa University, Kakuma-machi, Kanazawa Ishikawa 920-1192 Japan

7. School of Chemistry and Chemical Engineering Northwestern Polytechnical University, Xi'an Shaanxi 710072 P. R. China

Abstract

AbstractSelf‐inclusion complexes consisting of host‐guest conjugates are one of the unique supramolecular structures because they form in‐state and out‐state depending on the external stimuli. Despite many reports of the stimuli‐responsive self‐inclusion complex formation, study of the structural relaxation from out‐state to in‐state by photoexcitation has been unexplored. Herein, we report that an electron‐donating host and an electron‐accepting guest conjugate exhibits the structural relaxation from out‐state to in‐state by photoexcitation. Formation of the in‐state in the excited state resulted in exciplex emission along with the locally excited emission from the out‐state. Moreover, this structural relaxation by photoexcitation was suppressed not only by temperature, but also by the presence of guest molecules, resulting in changes in the ratio of the dual emission intensities.

Funder

Japan Society for the Promotion of Science

Core Research for Evolutional Science and Technology

Publisher

Wiley

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