Jiao Y, Zhou L, He H, Yin J, Gao Q, Wei J, Duan C, Peng X. A novel rhodamine B-based "off-on'' fluorescent sensor for selective recognition of copper (II) ions.
Talanta 2018;
184:143-148. [PMID:
29674025 DOI:
10.1016/j.talanta.2018.01.073]
[Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/15/2018] [Accepted: 01/29/2018] [Indexed: 11/17/2022]
Abstract
A novel rhodamine based sensor RBH was developed and synthesized by rhodamine B with 3-methyl-2-benzothiazolinone hydrazone, which exhibited high selectivity and sensitivity for sensing Cu2+ ions in the presence of other important relevant metal ions in aqueous acetonitrile. As an "off-on" fluorescent sensor, RBH exhibited a UV-vis absorption increase at 570 nm and a 132-fold significant fluorescence enhancement at 580 nm with a distinct color change from colorless to purple upon the addition of Cu2+ ions. The fluorescence intensity of RBH is linear with the Cu2+ ions concentration with low limit of detection. Furthermore, the sensor RBH has been successfully utilized for fluorescence imaging of Cu2+ ions in living cells. The sensor could potentially recognize Cu2+ ions in biological system.
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