One-pot synthesis of fluorescent DHLA-stabilized Cu nanoclusters for the determination of H2O2

A facile one-pot approach has been developed to prepare orange-emitting Cu nanoclusters (NCs) using tetrakis(hydroxymethyl)phosphonium chloride as a reducing agent and lipoic acid as a capping agent under an alkaline medium at room temperature. The as-prepared Cu NCs exhibited excellent water solubi...

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Veröffentlicht in:Talanta (Oxford) 2015-08, Vol.141, p.80-85
Hauptverfasser: Zhou, Tingyao, Yao, Qiuhong, Zhao, Tingting, Chen, Xi
Format: Artikel
Sprache:eng
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Zusammenfassung:A facile one-pot approach has been developed to prepare orange-emitting Cu nanoclusters (NCs) using tetrakis(hydroxymethyl)phosphonium chloride as a reducing agent and lipoic acid as a capping agent under an alkaline medium at room temperature. The as-prepared Cu NCs exhibited excellent water solubility, large Stokes shift, long lifetime and good dispersion. After the addition of polyvinyl pyrrolidone, the fluorescence intensity of dihydrolipoic acid-stabilized Cu NCs (DHLA-Cu NCs) was greatly enhanced, and their fluorescence signal remained stable for 5 weeks storage in the dark at room temperature. Based on H2O2-induced fluorescence quenching, DHLA-Cu NCs showed high sensitivity and selectivity for the detection of H2O2 in aqueous solution with a detection limit of 0.3μM, and were applied successfully to the detection of H2O2 in human urine samples. [Display omitted] •A facile one-pot approach was developed to prepare fluorescent Cu NCs.•The Cu NCs exhibited excellent water solubility, tiny size and good dispersion.•PVP could enhance the fluorescence intensity of the Cu NCs.•The Cu NCs showed high selectivity and sensitivity for the determination of H2O2.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2015.03.056