Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 141, Issue -, Pages 113-118Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.01.042
Keywords
Chemosensor; Cyanide; Fluorescent turn-on; High sensitivity; Specific selectivity
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Funding
- National Natural Science Foundation of China (NSFC) [21064006, 21161018, 21262032]
- Natural Science Foundation of Gansu Province [1010RIZA018]
- Program for Changjiang Scholars and innovative Research Team in University of Ministry of Education of China [IRT1177]
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A new chemosensor Sz based on Schiff-base group as recognition site and naphthalene as the fluorescence signal group was designed and synthesised. It could fluorescent turn-on detect cyanide (CN-) via a novel mechanism of nucleophilic addition induced Schiff-base hydrolysis. Adding the CN- into the solution of Sz could induce Sz to emit blue fluorescence at 435 nm instantly. Moreover, Sz could also colorimetric detect CN-. Upon the addition of CN-, the Sz showed dramatic color change from yellow to colorless. These sensing procedures could not be interfered by other coexistent competitive anions such as F-, AcO-, H2PO4- and SCN-. In addition, Sz showed high sensitivity for CN-, the detection limits is 3.42 x 10(-8) M of CN-, which is far lower than the WHO guideline of CN- in drinking water (less than 1.9 x 10(-6) M). The CN- test strips based on Sz could act as a convenient CN- test kits. (C) 2015 Elsevier B.V. All rights reserved.
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