Yang G, Meng X, Fang S, Duan H, Wang L, Wang Z. A highly selective colorimetric fluorescent probe for detection of Hg2+ and its application on test strips.
RSC Adv 2019;
9:8529-8536. [PMID:
35518693 PMCID:
PMC9061705 DOI:
10.1039/c9ra00797k]
[Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 03/02/2019] [Indexed: 11/21/2022] Open
Abstract
An efficient fluorescent probe Pyr-Rhy based on pyrazole was developed, which can detect Hg2+ in water. Its fluorescence properties were studied by UV-vis and fluorescence spectroscopy, and the study results indicated that this probe can selectively detect Hg2+via complexation reaction, and then cause a remarkable color change from colorless to pink and a strong fluorescence enhancement can be observed. Furthermore, this probe showed high sensitivity with the detection limit down to 2.07 × 10−8 M, and its stoichiometric ratio toward Hg2+ ions was 1 : 1. The sensing mechanism was investigated by Job's plot 1H NMR titrations, and FT-IR spectra analysis, which demonstrated a chelation-enhanced fluorescence (CHEF) mechanism. More importantly, obvious color changes of sensor Pyr-Rhy can be observed when it was impregnated on filter paper testing strips and immersed in Hg2+ solution (water as solution), indicating its potential application for trace Hg2+ detection in environmental samples.
An efficient fluorescent probe Pyr-Rhy based on pyrazole was developed, which can detect Hg2+ in water.![]()
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