Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 198, Issue -, Pages 455-461Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.03.046
Keywords
Chemosensors; Cyanide anion; Colorimetric; Diketopyrrolopyrrole; Exciplex
Funding
- National Natural Science Foundation of China [21274045]
- Pearl River in Guangzhou city of Nova of Science and Technology Special Funded Projects [2012J2200009]
- Fundamental Research Funds for the Central Universities [2013ZZ067]
- Natural Science Foundation of Guangdong Province [10351064101000000]
- National Basic Research Program of China [2012CB720801]
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A new fluorescent probe 1 comprising diketopyrrolopyrrole and indanedione-based Michael receptor, which recognized cyanide anion with high selectivity was designed and synthesized. Addition of CN-aqueous solution to 1 in THF resulted in a rapid color change from purple to yellow together with a large blue shift from 553 to 480 nm, while other anions did not induce any significant color change. Furthermore, the Michael addition of cyanide to 1 elicited 3.11 and 6.13-fold PL enhancements at 484 and 572 nm, respectively, which constituted the fluorescence signature for cyanide detection. The mechanism of exciplex formation was proposed for this interesting observation. The detection limits were 0.36 mu M using the fluorescence spectra changes, which was far lower than the WHO guideline of 1.9 mu M. The results indicated 1 can act as dual-channel, high selective, immediacy and sensitive optical probe for CN. (C) 2014 Elsevier B.V. All rights reserved.
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