journal article·2023-05Open access

Realizing Photoswitchable Mechanoluminescence in Organic Crystals Based on Photochromism

Zongliang Xie, Xiayu Zhang, Yuxin Xiao, Hailan Wang, Mingyao Shen, Simin Zhang, Haodong Sun, Rongjuan Huang, Tao Yu, Wei Huang

Advanced Materials· Volume 35· Issue 21

Abstract

Abstract Organic mechanoluminescent (ML) materials possessing photophysical properties that are sensitive to multiple external stimuli have shown great potential in many fields, including optic and sensing. Particularly, the photoswitchable ML property for these materials is fundamental to their applications but remains a formidable challenge. Herein, photoswitchable ML is successfully realized by endowing reversible photochromic properties to an ML molecule, namely 2‐(1,2,2‐triphenylvinyl) fluoropyridine (o‐TPF). o‐TPF shows both high‐contrast photochromism with a distinct color change from white to purplish red, as well as bright blue ML (λML = 453 nm). The ML property can be repeatedly switched between ON and OFF states under alternate UV and visible light irradiation. Impressively, the photoswitchable ML is of high stability and repeatability. The ML can be reversibly switched on and off by conducting alternate UV and visible light irradiation in cycles under ambient conditions. Experimental results and theoretical calculations reveal that the change of dipole moment of o‐TPF during the photochromic process is responsible for the photoswitchable ML. These results outline a fundamental strategy to achieve for the control of organic ML and pave the way to the development of expanded smart luminescent materials and their applications.
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Research context

OpenAlex topics: Photochromic and Fluorescence Chemistry · Luminescence and Fluorescent Materials · Polydiacetylene-based materials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics & Xi'an Institute of Biomedical Materials and Engineering Northwestern Polytechnical University 127 West Youyi Road Xi'an 710072 China

Key laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical University 218 Qingyi Road Ningbo 315103 China

Department of Science and Environmental Studies The Education University of Hong Kong 10 Lo Ping Road, Tai Po, New Territories Hong Kong P. R. China

Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials Nanjing University of Posts and Telecommunications Nanjing 210023 China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · China Postdoctoral Science Foundation · Natural Science Basic Research Program of Shaanxi Province · Natural Science Foundation of Ningbo

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