Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 224, Issue -, Pages 364-371Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.10.045
Keywords
Aza-BODIPY; Turn on fluorescence; Chemodosimetric sensor; Meso -C=N bond of aza-BODIPY; Nucleophilic attack by CN- ion; NIR region; Colorimetric sensor
Funding
- Department of Science and Technology (DST) [SR/S1/IC-12/2011]
- Council of Scientific and Industrial Research (CSIR)
- UGC
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We report for the first time that 1,3,5,7-tetraaryl aza-BODIPYs can be used as an exclusive chemodosimetric, colorimetric and turn-on fluorescence sensor for CN- ion. We demonstrated that CN- ion attacks the -C=N bond of aza-BODIPY core via nucleophilic addition reaction and the resultant compound show significant alteration in electronic properties because of disruption of conjugation as verified by spectral and electrochemical studies. Specially, the aza-BODIPY which exhibit moderate fluorescence in NIR region changes to fluorescent compound which emits strongly in the visible region and thus the 1,3,5,7-tetraaryl aza-BODIPY can be used as turn-on fluorescence sensor for CN- ion. We also used 2-formy1-1,3,5,7-tetraaryl aza-BODIPY which has both -C=N and -CHO active sites for nucleophilic attack by CN- ion and showed that CN- ion prefer -C=N over -CHO as demonstrated here. (C) 2015 Elsevier B.V. All rights reserved.
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