期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 127, 期 41, 页码 20459-20465出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.3c03459
关键词
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A stimuli-responsive luminophore with a supramolecular organic framework structure has been designed and synthesized. It exhibits reversible and cyclical solid-state phase transitions triggered by external stimuli, such as mechanical grinding, thermal annealing, and solvent treatment, accompanied by color changes in emission.
A stimuli-responsive luminophore embedding an overcrowded bistricyclic aromatic ene structure with a heptagon=hexagon central ring, DCHA-TRZ, has been designed and synthesized. In a single-crystalline solid, DCHA-TRZ constructed a supramolecular organic framework (SOF) including n-hexane molecules as a guest molecule. The crystalline SOF (alpha phase) exhibited reversible crystalline (alpha)-to-amorphous-to-crystalline (alpha) solid-state phase transitions triggered by external stimuli of mechanical grinding and treatment with an n-hexane solvent, in which release and inclusion of the guest molecules played an important role. Moreover, the thermal annealing of the amorphous ground solid afforded a bluish-green-emitting solid with a different crystalline phase (beta). The combination of the three external stimuli of mechanical grinding, thermal annealing, and solvent treatment enables the reversible and cyclical phase transitions among three solid-state phases (crystalline alpha and beta and amorphous) under concomitant emission color changes.
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