Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202113073
Keywords
chemical deformation; fluorescence; mechanochromism; photomechanical bending; single crystal
Categories
Funding
- National Natural Science Foundation of China [U20041101, 21772034, U1704251]
- top-notch personnel fund of Henan agricultural university [30500418]
Ask authors/readers for more resources
This study reports a fluorescent single crystal with optical plastic bending and fluorescence switching properties, attributed to extended pi-conjugation and molecular slippage. The crystal also exhibits high elasticity and reversible fluorescence switching triggered by various stimuli.
Fluorescent single crystals that respond to multiple external stimuli are of great interest in molecular machines, sensors, and displays. The integration of photo- or acid-induced fluorescence enhancement and bending in one organic crystal, however, has not been reported yet. Herein, we report the interesting plastic photomechanical bending and switching on of the fluorescence of an azine crystal in a single-crystal transformation, due to extended pi-conjugation and molecular slippage. Moreover, the fluorescent plastic bending driven by multiple volatile acid vapors was firstly observed, and attributed to the synergistic effect of push-pull electronic structure and hydrogen bonding. The single crystal also shows high elasticity under external force. In addition, reversible fluorescence switching can be triggered by grinding and solvent fuming, as well as by the adsorption and desorption of HCl vapor. The integration of plastic, elastic bending and switch-on fluorescence into one single crystal provides a new strategy for next-generation smart materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available