A fluorescent probe for copper and hypochlorite based on rhodamine hydrazide framework
- Authors
- Yoon, Jung Won; Chang, Min Jung; Hong, Seungwoo; Lee, Min Hee
- Issue Date
- Oct-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Fluorescence turn-on; Rhodamine hydrazide; Copper detection; Hypochlorite detection
- Citation
- TETRAHEDRON LETTERS, v.58, no.40, pp 3887 - 3893
- Pages
- 7
- Journal Title
- TETRAHEDRON LETTERS
- Volume
- 58
- Number
- 40
- Start Page
- 3887
- End Page
- 3893
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/8120
- DOI
- 10.1016/j.tetlet.2017.08.071
- ISSN
- 0040-4039
- Abstract
- A rhodamine derivative (1) was synthesized as a fluorescence turn-on probe for copper (Cu2+) and hypochlorite (CIO-). The probe gave a fluorescence turn-on change at 587 nm with a color change from colorless to pink in the presence of Cu2+ or ClO- ions in aqueous solution. It was found that the Cu2+ ion bound to 1 in a 1:1 stoichiometry and induced a spirolactam ring opening of the rhodamine moiety leading to a fluorescence turn-on, confirmed by Job's plot, ESI-Mass, and H-1 NMR analyses. In the presence of ClO- ion, probe 1 underwent a hypochlorite-mediated oxidation and hydrolysis to produce a ring-opened rhodamine B with a fluorescence enhancement, However, these changes were not monitored in case of other metal ions, anions, and reactive redox species, In addition, probe 1 can readily react with the ClO- to provide a distinct fluorescence enhancement along with a pink color even in the presence of various competitive species. (C) 2017 Elsevier Ltd. All rights reserved.
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