Thiazole-based chemosensor II: synthesis and fluorescence sensing of fluoride ions based on inhibition of ESIPT |
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| Authors: | Aasif Helal Nugen Thi Thu Thao Soon W Lee Hong-Seok Kim |
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| Institution: | 1. Department of Applied Chemistry, Kyungpook National University, Daegu, 702-701, Republic of Korea
2. Department of Chemistry and School of Molecular Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
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| Abstract: | Novel chemosensors based on 2-(2′-hydroxyphenyl)-4-phenylthiazole were synthesized and their anion sensing behaviors were investigated. Sensors 1 and 2 show fluoride ion selective behaviors related to their absorption and emission spectra amongst F?, CH3CO2 ?, H2PO4 ?, Cl?, Br?, I?, ClO4 ?, NO3 ?, and HSO4 ? anions. Sensor 2 shows color change upon interaction with F?. Interactions of 1, 2 and 3 with F? cause a red-shift in UV–vis absorption and a large Stokes shift in fluorescence emission due to the inhibition of ESIPT induced by the deprotonation of phenolic proton by F?. |
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