Journal
ANALYTICA CHIMICA ACTA
Volume 786, Issue -, Pages 139-145Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2013.05.011
Keywords
Fluorescent probe; Palladium; Excited-state intramolecular proton transfer; Paper strip; Solid state fluorescence
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Funding
- National Basic Research Program of China (973 Program) [2010CB126100]
- National High Technology Research and Development Program of China (863 Program) [2011AA10A207]
- National Natural Science Foundation of China [21202097]
- Fundamental Research Funds for the Central Universities
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A highly selective fluorescent probe (OHBT) was designed and synthesized by linking the ESIPT fluorophore N-(3-(benzo[d]thiazol-2-yl)-4-(hydroxyphenyl) benzamide) (HBTBC) to the palladium specificity response group, allyl group, for the detection of palladium species in aqueous solution. The allyl group can be hydrolyzed by Pd-0 species through the Pd-0-catalyzed Tsuji-Trost reaction and thus release the fluorophore HBTBC, which shows two emission bands. The maximum emission spectra originated from the enol and keto forms at 415 and 555 nm respectively and with no overlap, which implies the high resolution of the palladium detection. The palladium species can also be detected by paper strip because of the solid-state fluorescence of probe HOBT catalyzed by palladium. This method was successfully applied in the palladium related Suzuki-Miyaura coupling reaction and the detection limit is lower than 1 mu M. (C) 2013 Elsevier B.V. All rights reserved.
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