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- W2078010025 abstract "A neutral phosphorescent coordination compound bearing a benzimidazole ligand, Ir(pbi)(2)(acac) (Hpbi = 1,2-diphenyl-1H-benzo[d]imidazole; Hacac = acetylacetone), is demonstrated to be the first example of a sulfur-free iridium complex for the detection of Hg(2+) cations with high selectivity and sensitivity. Ir(pbi)(2)(acac) shows a multisignaling response towards mercury(II) ions through UV-vis absorption, phosphorescence and electrochemistry measurements. Upon addition of Hg(2+) ions, solutions of this complex change from yellow to colorless, which could be observed easily by the naked eye, while its phosphorescence turns from bright green (λ(PLmax) = 520 nm) into faint skyblue (λ(PLmax) = 476 nm), and the detection limit is calculated to be 2.4 × 10(-7) mol L(-1). (1)H NMR spectroscopic titration as well as ESI-MS results indicate that the decomposition of Ir(pbi)(2)(acac) in the presence of Hg(2+) through rupture of Ir-O bonds is responsible for the significant variations in both optical and electrochemical signals." @default.
- W2078010025 created "2016-06-24" @default.
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- W2078010025 date "2012-01-01" @default.
- W2078010025 modified "2023-09-23" @default.
- W2078010025 title "A highly selective sulfur-free iridium(iii)-complex-based phosphorescent chemidosimeter for detection of mercury(ii) ions" @default.
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- W2078010025 doi "https://doi.org/10.1039/c2dt12120d" @default.
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