文献类型：期刊文献

英文题名：A coumarin-based near-infrared fluorescent probe with a large stokes shift for the sequential recognition of Ni2+ and CN- : Performance research and quantum calculation

作者：Wang, Kai[1,2];Zhao, Chengxi[3,4];Guo, Shaohua[1,2];Lu, Yunxiang[3,4];Shen, Yongjia[1,2];Wang, Chengyun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Meilong Rd 130, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Dept Chem, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2019

卷号：382

外文期刊名：JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

收录：;EI(收录号：20242616372902);WOS:【SCI-EXPANDED(收录号:WOS:000481566700039)】；

基金：The authors are grateful to financial support from Natural Science Foundation of Shanghai (16ZR1408000) and the Fundamental Research Funds for the Central Universities (WJ1814055).

语种：英文

外文关键词：Near-infrared fluorescence; Large stokes shift; Sequential recognition; Quantum calculation

摘要：The design and synthesis of bifunctional probes have gradually become a new research focus in the field of fluorescent probes. In this work, a reversible colorimetric and NIR fluorescent probe (Ni-3) for the sequential detection of Ni2+ and CN- was developed based on 3-benzothiazolyl-7-hydroxycoumarin. This probe featured a large Stokes shift (145 nm) and excellent anti-fatigue performance for the sequential detection of Ni2+ and CN-. Ni-3 showed a highly colorimetric response to Ni2+ and the selectivity could be distinguished by naked eyes. Besides, Ni-3 also exhibited selective NIR fluorescence response toward Ni2+ due to the paramagnetic effect and the chelation-enhanced quenching (CHEQ) effect. Additionally, the in situ generated complex [2 Ni - 3 + Ni2+] showed highly sensitive and selective sensing ability for CN- via Ni2+ displacement approach. The limit of detection toward CN- (1.29 mu M) was lower than the maximum acceptable concentration level of cyanide in drinking water (1.9 mu M) set by WHO. Furthermore, a "paralleled-coordination" mode between Ni - 3 and Ni2+ was proposed and demonstrated with the aid of quantum calculations.