Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 338, Issue -, Pages 1-7Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2017.01.026
Keywords
Mono-thiosemicarbazones; Fluorescence chemosensors; Mercury; Solid state sensor; 1,3-diaminothiourea
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Funding
- National Natural Science Foundation of China [21262034, 21364013]
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A novel mono-thiosemicarbazone Schiff base chemosensor Ml (N'-(4-diphenylamino)benzylidene) hydrazinecarbothiohydrazide) was designed and synthesized as a highly selective and sensitive probe for Hg2+ detecting in aqueous media. A remarkable fluorescence quenching at 487 nm was observed in the presence of He2+, accompanied by the red-shift of the absorption spectrum. This sensing system displays remarkable specificity to He2+ against other possible competing ions. The detection limit and the association constant were 3.11 x 10(-8) M and 7.485 x 10(7)M(-1), respectively. Moreover, the disposable test strip will be a promising candidate for point-of-use monitoring of He2+ in environmental and biological samples with the advantages of cost-effectiveness, portability, and convenience. (C) 2017 Elsevier B.V. All rights reserved.
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