Li H, Wang J, Zhang S, Gong C, Wang F. A novel off-on fluorescent chemosensor for Al
3+ derived from a 4,5-diazafluorene Schiff base derivative.
RSC Adv 2018;
8:31889-31894. [PMID:
35547517 PMCID:
PMC9085904 DOI:
10.1039/c8ra05280h]
[Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 08/21/2018] [Indexed: 12/23/2022] Open
Abstract
The performance of a chemosensor is closely related to its structure. A new Schiff bass (DFSB) based on 4,5-diazafluorene units has been synthesized in this work. The interaction of DFSB with different metal ions has been studied using UV-vis absorption spectra and fluorescent spectra. The results show that DFSB is a highly selective and sensitive probe for Al3+ ions over other commonly coexisting metal ions in ethanol. A very obvious fluorescence enhancement effect was observed, and a turn-on ratio over 1312-fold was triggered with the addition of 10 equiv. of Al3+ ions. What is more, such fluorescent responses could be detected by the naked eye under a UV-lamp. The lowest detection limit for Al3+ was determined as 3.7 × 10-8 M. The complex solution (DFSB-Al3+) exhibited reversibility with EDTA. These results may be caused by the unique molecular structure.
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