Hou L, Liang W, Deng C, Zhang C, Liu B, Shuang S, Wang Y. A sensitive OFF–ON–OFF fluorescent probe for the cascade sensing of Al3+ and F− ions in aqueous media and living cells.
RSC Adv 2020;
10:21629-21635. [PMID:
35518729 PMCID:
PMC9054392 DOI:
10.1039/d0ra02848g]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/25/2020] [Accepted: 05/26/2020] [Indexed: 11/21/2022] Open
Abstract
A simple Schiff-base ligand 2-hydroxy-1-naphthaldehyde semicarbazone (HNS) was synthesized and characterized. Based on the combined effect of inhibition of CH
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N isomerization and chelation-enhanced fluorescence (CHEF), HNS functions as a fluorescence “turn on” sensor for Al3+ in buffered aqueous media. Based on the strong affinity of Al3+ to F− ions, the in situ generated Al3+–HNS complex can also be utilized as an effective chemosensor for F− sensing by metal displacement approach, ensuing quenching of fluorescence by the reversible return of HNS from Al3+–HNS complex. Thus a method using a single probe for the detection of both Al3+ and F− ions is developed. The system exhibits high selectivity and sensitivity for Al3+ and F− ions and the detection limits were found to be as low as 6.75 × 10−8 M and 7.89 × 10−7 M, respectively. Furthermore, the practical applicability of this probe has been examined in living cells.
A simple Schiff-base ligand 2-hydroxy-1-naphthaldehyde semicarbazone (HNS) was synthesized and applied to the sequential sensing of Al3+ and F− ions in aqueous media and live cells.![]()
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