Tuning the Photophysical Properties of Symmetric Squarylium Dyes: Investigation on the Halogen Modulation Effects

A series of symmetric squarylium dyes (SQDPA‐X) with different halogen (X=F, Cl, Br, I) substituents have been developed. The photophysical properties could be facilely tuned by the halogen modulation effects. The strategy of incorporating different halogen substitutions into AIE active luminogens e...

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Bibliographic Details
Published in:Chemistry : a European journal 2019-01, Vol.25 (2), p.469-473
Main Authors: Chen, Weiben, Zhang, Simeng, Dai, Gaole, Chen, Ying, Li, Miao, Zhao, Xiaoyu, Chen, Yulan, Chen, Long
Format: Article
Language:English
Subjects:
aggregation-induced emission
Chemistry
Dyes
Fluorescence
Fluorescent dyes
Fluorescent indicators
halogen
mechanochromism
Modulation
symmetric squarylium dyes
vapochromism
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Summary:A series of symmetric squarylium dyes (SQDPA‐X) with different halogen (X=F, Cl, Br, I) substituents have been developed. The photophysical properties could be facilely tuned by the halogen modulation effects. The strategy of incorporating different halogen substitutions into AIE active luminogens enables a facile approach for exploring new intriguing organic fluorescent dyes. Four symmetric squarylium dyes with different halogen substituents have been facilely synthesized. The photophysical properties exhibit distinctive dependence on the halogen substitutions.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201804393