journal article·2023-05-01

Pressure/Thermo-Induced Hypsochromic-Shifted and Enhanced Luminescence Based on Carbazole Emitter

Jun-Cheng Yang, Zhiyuan Fu, Huili Ma, Tao Wang, Qiuying Li, Kai Wang, Lin Wu, Pu Chen, Hai-Tao Feng, Ben Zhong Tang

ACS Materials Letters· Volume 5· Issue 5
Publisher page

Abstract

Most organic mechanochromic luminogens show bathochromic-shifted and quenched emission with increasing pressure. Design of turn-on mechanochromic material with hypsochromic-shifted luminescence is still a challenge. Herein, a novel emitter (namely DCzPy) was prepared through laboratory-synthesized carbazole to study its stimuli-responsive luminescence. The crystalline powders of DCzPy emitted blue-green fluorescence at 490 nm. Upon gently grinding, the fluorescence intensity of DCzPy was dramatically enhanced with a hypsochromic shift by 33 nm. Further heavily grinding, its emission wavelength returned to 490 nm. Powder X-ray diffraction patterns indicated that such behaviors were attributed to the solid-state morphology transition from crystal to crystal. Interestingly, a large bathochromic-shifted and weakened fluorescence was achieved under isotropic compression. Moreover, thermoresponsive behavior of DCzPy was studied in the film to find that its emission turned from green to blue as the temperature increased. Given the thermo-induced fluorescence switching of DCzPy, a two-dimensional code was fabricated for information anticounterfeiting.
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Research context

OpenAlex topics: Luminescence and Fluorescent Materials · Polydiacetylene-based materials and applications · Organic Light-Emitting Diodes Research

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

Affiliations

AIE Research Center, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, People’s Republic of China

State Key Laboratory of Superhard Materials, Jilin University, Changchun, Jilin 130012, People’s Republic of China

Key Laboratory of Flexible Electronics & Institute of Advanced Materials Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 211816, People’s Republic of China

Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, People’s Republic of China

Funding

Education Department of Shaanxi Province · National Natural Science Foundation of China · Shaanxi Provincial Science and Technology Department · Guangdong Basic and Applied Basic Research Foundation · University Association for Science and Technology in Shaanxi, · Shaanxi Province

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