Abstract
A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzo[d]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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The National Research Foundation of Korea (NRF) (2018R1A2B6001686 and NRF-2020R1A6A1A03042742) is gratefully acknowledged.
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Gyeongjin Kim (60% contributions), Donghwan Choi (10% contributions), Cheal Kim (30% contributions).
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Kim, G., Choi, D. & Kim, C. A Benzothiazole-Based Fluorescence Turn-on Sensor for Copper(II). J Fluoresc 31, 1203–1209 (2021). https://doi.org/10.1007/s10895-021-02752-x
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DOI: https://doi.org/10.1007/s10895-021-02752-x