Journal
DYES AND PIGMENTS
Volume 112, Issue -, Pages 255-261Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2014.07.026
Keywords
Enhanced emission; Styrylbenzoxazole; Response; Protonation; Crystal; Excimer
Funding
- National Natural Science Foundation of China [21103067, 21374041]
- Youth Science Foundation of Jilin Province [20130522134JH]
- Science and Technology Development Plan of Jilin Province, China [20130521003JH]
- Open Project of the State Key Laboratory of Supramolecular Structure and Materials [SKLSSM201407]
- Open Project of State Laboratory of Theoretical and Computational Chemistry [K2013-02]
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A benzoxazole derivative called BVDA was synthesized. BVDA exhibited an AIE effect although there was H-aggregated dimer in the crystal. According to the spectral results and crystal structure, the presence of excimer and the restriction of intramolecular rotation are responsible for the AIE phenomenon. Moreover, BVDA could respond to proton in solution and to volatile acid vapours in film. BVDA exhibited three colours because its binding sites to proton have different basicities. These binding sites can then be protonated in turn. These results indicate that AIE fluorophores with H-aggregated dimer is possible. Furthermore, these fluorophores can exhibit stimuli-responsive characteristics through the introduction of functional moieties. (C) 2014 Elsevier Ltd. All rights reserved.
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