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Preparation, characterization, luminescent and electrochemical properties of Ru(bpy)2-functionalized silica nanoparticles

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Abstract

Ru(II)-complex functionalized silica nanoparticles(nano-SiO2) were prepared via a coordination reaction of cis-dichlorobis(2,2’-bipyridine)ruthenium[Ru(bpy)2Cl2] complex with poly(4-vinylpyridine)(P4VP)-modified nano-SiO2 particles. Both the Ru-complex and the functionalized nano-SiO2P4VP-Ru(bpy) hybrids were doped in poly(methyl methacrylate)(PMMA) to form optically transparent thin films. The composition and spectroscopic properties of the nano-SiO2P4VP-Ru(bpy) hybrids were evaluated with the help of thermogravimetric and elemental analysis, and UV-Vis absorption spectroscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and fluorescence spectroscopy. Microscopy images revealed that the nanohybrids were approximately 12 nm in diameter and readily formed aggregates following the functionalization with P4VP and Ru(bpy)2Cl2. The as-prepared nano-SiO2P4VP-Ru(bpy) hybrids produced emissions at approximately 604 and 654 nm under radiation both in solution and in doped thin films. Finally, cyclic voltammetry studies on the nanohybrid-modified electrode revealed a redox couple with the cathodic and anodic potentials at approximately 0.28 and 0.73 V(vs. Ag/AgCl), attributed to the one electron transfer of Ru(bpy) 2+/3+2 immobilized on the nano-SiO2 particles.

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Authors and Affiliations

  1. State Key Laboratory of Molecular Engineering of Polymer, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China

    Hongxiang Huang

  2. Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China

    Wenli He & Yueyang Ma

Authors
  1. Hongxiang Huang
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  2. Wenli He
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  3. Yueyang Ma
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Correspondence to Hongxiang Huang.

Additional information

Supported by the National Natural Science Foundation of China(No.21373058).

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Huang, H., He, W. & Ma, Y. Preparation, characterization, luminescent and electrochemical properties of Ru(bpy)2-functionalized silica nanoparticles. Chem. Res. Chin. Univ. 32, 695–701 (2016). https://doi.org/10.1007/s40242-016-6090-x

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  • DOI: https://doi.org/10.1007/s40242-016-6090-x

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