期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 27, 页码 32270-32277出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c08316
关键词
hydrogen-bonded organic framework; guest; fluorescence; force-stimuli response; anticounterfeit
资金
- Scientific Research Foundation of Tianjin Normal University [5RL151]
- Tianjin Natural Science Foundation [18JCYBJC42900]
- Science &Technology Development Fund of Tianjin Education Commission for Higher Education [2018ZD12]
Guest molecules can regulate the luminescence properties of porous materials and trigger responses to force stimuli. In this study, acetic acid as a guest was found to induce longer emission wavelengths in the material and trigger mechanical force response.
Guest molecules may endow porous materials with new or enhanced properties as well as functions. Here, a porous hydrogen-bonded organic framework (HOF) constructed from a three-armed triphenylamine derivative is used to investigate how guests regulate photoluminescence and trigger force-stimuli response. It was found that guest solvents in pores might regulate HOF's luminescence. Interestingly, acetic acid as a guest endowed HOF materials with longer emission wavelengths and triggered the responses to mechanical force stimuli. Under shear force, an obvious blueshift in emission spectra was observed because of the loss of free guests and the conversion of pi-stacking model. Further blue-shifted emission appeared while the bound guests were completely removed by heating. Mechanofluorochromic HOF materials could be regenerated through recrystallization and adsorbing guest. Conversely, HOFs with other guests and activated HOFs only resulted in a slight change in their fluorescence behaviors after force stimuli.
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