Affiliation:
1. Key Laboratory of Luminescence and Optical Information Ministry of Education School of Physical Science and Engineering Beijing Jiaotong University Beijing 100044 P. R. China
2. College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 P. R. China
3. Beijing Key Laboratory for Optical Materials and Photonic Devices Capital Normal University Beijing 100048 P. R. China
4. Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
Abstract
AbstractOrganic afterglow materials have significant applications in information security and flexible electronic devices with unique optical properties. It is vital but challenging to develop organic afterglow materials possessing controlled output with multi‐stimuli‐responsive capacity. Herein, dimethyl terephthalate (DTT) is introduced as a strong proton acceptor. The migration direction of N─H protons on two compounds Hs can be regulated by altering the excitation wavelength (Ex) or amine stimulation, thereby achieving dual‐stimuli‐responsive afterglow emission. When the Ex is below 300 nm, protons migrate to S1‐2DTT, where strong interactions induce phosphorescent emission of Hs, resulting in afterglow behavior. Conversely, when the Ex is above 300 nm, protons interact with the S0DTT weakly and the afterglow disappears. In view of amine‐based compounds with higher proton accepting capabilities, it can snatch proton from S1‐2DTT and redirect the proton flow toward amine, effectively suppressing the afterglow but obtaining a new redshifted fluorescence emission with Δλ over 200 nm due to the high polarity of amine. Moreover, it is successfully demonstrated that the applications of dual‐stimuli‐responsive organic afterglow materials in information encryption based on the systematic excitation‐wavelength‐dependent (Ex‐De) behavior and amine selectivity detection.
Funder
National Basic Research Program of China
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry