Journal
DYES AND PIGMENTS
Volume 101, Issue -, Pages 74-84Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2013.08.026
Keywords
Aggregation-enhanced emission; Tetraphenylethylene derivatives; Liquid crystal; Piezofluorochromism; Organogelator; Gelation-induced fluorescence enhancement
Funding
- National Natural Science Foundation of China [51173210, 51073177]
- Science and Technology Planning Project of Guangdong Province, China [2007A010500001-2, 20088090500196]
- Commission of Economy and Informatization of Guangdong Province
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Guangdong [S2011020001190]
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Two novel aggregation-induced emission compounds derived from tetraphenylethylene and gallic acid were synthesized and characterized. Both of the emission compounds possessed mesomorphic properties and exhibited mesomorphic phases over a wide temperature range and the thermal-induced mesomorphic transition from metastable to stable phases accompanied by a change of the luminescent color. The mesomorphic transition may be ascribed to liquid crystalline phase transition. The emission compounds possess different gelation behavior in organic solvents. The emission intensities of the emission compounds can be reversibly changed with the gel-solution transition by alternate cooling and heating. Moreover, the color and emission of these organogelators can be repeatedly switched by various external stimuli including pressing, heating and solvent-fuming. These new compounds may offer potential as external stimuli-responsive materials. (C) 2013 Elsevier Ltd. All rights reserved.
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