A Benzothiazole-Based Fluorescence Turn-on Sensor for Copper(II) |
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Authors: | Kim Gyeongjin Choi Donghwan Kim Cheal |
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Institution: | 1.Department of Fine Chem, Seoul National Univ. of Sci. and Tech. (SNUT), Seoul, 01088, South Korea ; |
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Abstract: | A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzod]thiazol-2(3H)-ylidene)hydrazono)methyl)naphthalen-2-ol) was synthesized for the detection of Cu2+. BTN could detect Cu2+ with “off-on” fluorescent response from colorless to yellow irrespective of presence of other cations. Limit of detection for Cu2+ was determined to be 3.3 μM. Binding ratio of BTN and Cu2+ turned out to be a 1:1 with the analysis of Job plot and ESI-MS. Sensing feature of Cu2+ by BTN was explained with theoretical calculations, which might be owing to internal charge transfer and chelation-enhanced fluorescence processes. |
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