期刊
NEW JOURNAL OF CHEMISTRY
卷 39, 期 9, 页码 7211-7218出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01214g
关键词
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资金
- 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 [2015ZZ037]
- Natural Science Foundation of Guangdong Province [10351064101000000]
- National Basic Research Program of China [2012CB720801]
A new calorimetric probe 1 comprising a diketopyrrolopyrrole-based Michael receptor, which recognized cyanide anions with high selectivity, was designed and synthesized. Addition of CN- aqueous solution to 1 in THE resulted in a rapid color change from pink to light yellow together with a large blue shift from 530 to 487 nm, while other anions did not induce any significant color change. Furthermore, Michael addition of cyanide to 1 elicited 94% fluorescence quenching at 640 nm accompanied by appearance of a weak new emission at 560 nm, which constituted the fluorescence signature for cyanide detection. The detection limits were determined to be 0.75 mu M using the fluorescence spectral changes, which were far lower than the WHO guideline of 1.9 mu M. Moreover, 1-based test strips could successfully detect CN- in water solutions.
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