Mechanochromic Luminescence of Aggregation-Induced Emission Luminogens.
Mechanochromic (MC) luminogens have found promising applications in mechanosensors, security papers, and optical storage for their change in emission behaviors in response to mechanical stimuli. Examples on MC luminescent materials are rare before the discovery of MC luminescence in aggregation-induced emission (AIE) luminogens. The twisted conformations of AIE luminogens (AIEgens) with appropriate crystallization capability afford loosely packing patterns, which facilitates their phase transformation in the solid state. The amorphous films of AIEgens exhibit enhanced emission intensity upon pressurization due to the increased molecular interactions, whereas crystals of AIEgens exhibit MC luminescence due to their amorphization by mechanical stimuli. AIEgens enrich the type of MC luminogens but those showing high emission contrast and multicolor emission switching and those working in a turn-on emission mode are seldom reported. Disclosure of the design strategy of high performance MC luminogens and exploration of their high-tech applications may be the future research directions for MC luminogens.
Beijing Key Laboratory of Energy Conversion and Storage Materials, Department of Chemistry, Beijing Normal University , Beijing, 100875, P. R. China.
Yong Qiang
YQ
Dong
Department of Chemistry, Division of Life Science, State Key Laboratory of Molecular Neuroscience, Institute for Advanced Study, Institute of Molecular Functional Materials and Division of Biomedical Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, P. R. China.|HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, P. R. China.
Jacky W Y
JW
Lam
Department of Chemistry, Division of Life Science, State Key Laboratory of Molecular Neuroscience, Institute for Advanced Study, Institute of Molecular Functional Materials and Division of Biomedical Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, P. R. China.|HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, P. R. China.|Guangdong Innovative Research Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
Ben Zhong
BZ
Tang
D005456:Fluorescent Dyes / Q000737:chemistry*; D049449:Luminescence
D005456:Fluorescent Dyes