期刊
ANALYTICA CHIMICA ACTA
卷 1065, 期 -, 页码 134-141出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2019.03.029
关键词
Cu2+ determination; ortho-arylethynyl benzothiazole; Chemosensor; Ratiometric; Large Stokes shift
资金
- National Natural Science Foundation of China [51773057, 21877034]
- National Students' platform for innovation and entrepreneurship training program, China [201810534014]
A novel ratiometric and reversible chemosensor 4-(2-(Benzo[d]thiazol-2-yl)phenyl)ethynyl)-N,N-diethylaniline (BT-1) based on ortho-arylethynyl benzothiazole with large Stokes shift (Delta lambda approximate to 190 nm) was designed and synthesized to recognize Cu2+. Copper ion induces a remarkable fluorescence enhancement and causes formation of a BT-1-Cu complex. The clamp-on coordination mode of BT-1 to Cu2+ was demonstrated using Job's plot, mass spectrum (MS) and DFT calculations. The calculations also indicate that Cu2+ was chelated to BT-1 through N and alkyne instead of S and alkyne. The probe could quantify Cu2+ with the detection limit of 3.2 x 10(-9)M. The in vitro imaging results indicated that the probe BT-1 was membrane-permeable and could be applied into the recognition of Cu2+ ions in living cells. (C) 2019 Elsevier B.V. All rights reserved.
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