Detection of Hydrogen Sulfide Using Photoluminescent Copper Nanoclusters
Date Issued
2014
Date
2014
Author(s)
Ma, Jia-Ying
Abstract
In this study, we unveiled a novel copper nanocluster (Cu NCs)-based sensor for the determination of hydrogen sulfide (H2S) in hot spring waters with high selectivity and sensitivity. We have developed a one-pot, inexpensive, simple and rapid method to synthesize photoluminescent Cu NC aggregates from Cu2+ ions in 65% (v/v) dimethylformamide (DMF) aqueous solution containing penicillamine (PA) as a capping and reducing agent. As-prepared PA-Cu NC aggregates emit at 580 nm when excited at 326 nm through an aggregation-induced emission effect, with solvent-dependent properties, a quantum yield of 2.0%, a long lifetime (τ1 = 0.4 ns (3%), τ2 = 126.5 ns (97%)), and a large stokes shift (254 nm). The PA-Cu NC aggregates are highly selective and sensitive for the detection of H2S, based on analyte-induced photoluminescence (PL) quenching through formation of CuS nanoparticles (NPs). The probe allows the detection of H2S, with a linear range of 1–100 μM and a limit of detection (LOD, signal-to-noise ratio = 3) of 500 nM. The practicality of this probe has been validated through the analysis of hot spring water samples.
Subjects
銅奈米團簇
青黴胺
聚集體
硫化氫
溫泉水
Type
thesis
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