A highly selective and sensitive "turn-on" fluorescent probe for rapid recognition and detection of Cu2+ in aqueous solution and in living cells

被引：21
作者：
Jiang, Nan [1 ]
Gong, Xue [1 ]
Zhong, Tianyuan [1 ]
Zheng, Yue [1 ]
Wang, Guang [1 ]
机构：
[1] Northeast Normal Univ, Key Lab Nanobiosensing & Nanobioanal Univ Jilin P, Fac Chem, Changchun 130024, Peoples R China
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2020年 / 1219卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Fluorescence probe; Copper ion; Density functional theory; Test paper; Cell imaging; COLORIMETRIC CHEMOSENSOR; ALZHEIMERS-DISEASE; COPPER DEFICIENCY; IONS DETECTION; CU(II) IONS; FE3+; PYRENE; SENSOR; RHODAMINE; PRION;
D O I：
10.1016/j.molstruc.2020.128573
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A 5-formyl-2-hydroxybenzoicacid-based fluorescence probe (L) for Cu2+ ions was designed and synthesized. L in CH3CN:H2O (1:9, v/v) solution displayed highly selective and sensitive fluorescence 'off-on' response over all the other competitive metal ions including Fe2+, Fe3+, Mn2+, Ba2+, Pb2+, Co2+, Cr3+, Cd2+, Na+, Zn2+, Hg2+, Ag+, Ca2+, Al3+, Mg2+, K+, Ni2+ and Y3+. The fluorescence intensity of L presented good linear relationship to the Cu2+ concentration and with the lower detection limits of 2.19 x 10(-7) M for Cu2+ ion. Job's plot, mass spectra, Benesi-Hildebrand plot and DFT calculation confirmed that fluorescence increased was caused by the formation of 1:2 complex between L and copper ion. The recovery tests demonstrated that L could accurately detect the existence of Cu2+ ions in water samples. In addition, L can recognize Cu2+ ion in living cells via the fluorescence confocal images and in water samples via test papers mode. (C) 2020 Elsevier B.V. All rights reserved.
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页数：8
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