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Brightly Tricolored Mechanochromic Luminescence from a Single-Luminophore Liquid Crystal: Reversible Writing and Erasing of Images


  • We thank Prof. K. Araki and Dr. T. Mutai for measurements of emission lifetime and quantum efficiency. This work was partially supported by the Grant-in-Aid for Scientific Research on Innovative Areas of “Fusion Materials: Creative Development of Materials and Exploration of Their Function through Molecular Control” (No. 2206) (T.K.) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and The Global COE Program (Chemistry Innovation through Cooperation of Science and Engineering) (T.K.) from MEXT. Y.S. is grateful for financial support from the Japan Society for the Promotion of Science Research Fellowship for Young Scientists.


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A glowing image: The photoluminescent colors reddish-orange, yellow, and green, are generated from a single liquid-crystalline mixture containing one luminophore (see picture). The colors are easily distinguished by the naked eye and can be reversibly written and erased. Moreover, these luminescent colors can be switched by mechanical and thermal stimuli.