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Issue 23, 2014
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Pt2Ag acetylide-doped silica nanoparticles: enabling luminescence of Pt2Ag complexes in water and sensors for highly sensitive detection of cyanide anions

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Abstract

Two novel luminescent hetero-trinuclear complexes [Pt2Ag(μ-dpppy)2(C[triple bond, length as m-dash]CC6H4R-4)4](ClO4) (R = H, 1; R = CH3, 2; dpppy = 2,6-bis(diphenylphosphino)pyridine) were synthesized by the self-assembly reaction between [Pt(C[triple bond, length as m-dash]CC6H4R-4)4]2− and [Ag2(μ-dpppy)3]2+ and characterized by elemental analyses, electrospray ionization mass spectrometry, and 1H NMR and 31P{1H} NMR spectroscopy and by X-ray crystallography for complex 2. Two Pt2Ag complexes show strong luminescence in the solid state, but exhibit weak emission in CH2Cl2 solution and in acetonitrile–water (1 : 1, v : v) solution at room temperature. To overcome the limitations of low water solubility and weak emission in solutions, a new kind of luminescent Pt2Ag@SiO2 nanoparticles was prepared by incorporating the new Pt2Ag acetylides into monodisperse silica nanoparticles. It is noted that Pt2Ag@SiO2 nanoparticles exhibit strong luminescence in aqueous solution, and cyanide anions tend to decrease their luminescence intensity in NaHCO3–NaOH buffer solution. Based on this, a novel nanosensor for highly sensitive detection of cyanide anions was developed in the range of 0.1–10.0 μM.

Graphical abstract: Pt2Ag acetylide-doped silica nanoparticles: enabling luminescence of Pt2Ag complexes in water and sensors for highly sensitive detection of cyanide anions

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Publication details

The article was received on 21 Feb 2014, accepted on 10 Apr 2014 and first published on 11 Apr 2014


Article type: Paper
DOI: 10.1039/C4DT00552J
Citation: Dalton Trans., 2014,43, 8861-8867
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    Pt2Ag acetylide-doped silica nanoparticles: enabling luminescence of Pt2Ag complexes in water and sensors for highly sensitive detection of cyanide anions

    X. Lin, Z. Li, X. Huang, Y. Jiang, Q. Wei and G. Chen, Dalton Trans., 2014, 43, 8861
    DOI: 10.1039/C4DT00552J

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