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高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (4): 695-701.doi: 10.1007/s40242-016-6090-x

• Articles • 上一篇    下一篇

Preparation, Characterization, Luminescent and Electrochemical Properties of Ru(bpy)2-functionalized Silica Nanoparticles

HUANG Hongxiang1, HE Wenli2, MA Yueyang2   

  1. 1. State Key Laboratory of Molecular Engineering of Polymer, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • 收稿日期:2016-03-11 修回日期:2016-06-06 出版日期:2016-08-01 发布日期:2016-06-20
  • 通讯作者: HUANG Hongxiang E-mail:hxhuang@fudan.edu.cn
  • 基金资助:

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

Preparation, Characterization, Luminescent and Electrochemical Properties of Ru(bpy)2-functionalized Silica Nanoparticles

HUANG Hongxiang1, HE Wenli2, MA Yueyang2   

  1. 1. State Key Laboratory of Molecular Engineering of Polymer, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Received:2016-03-11 Revised:2016-06-06 Online:2016-08-01 Published:2016-06-20
  • Contact: HUANG Hongxiang E-mail:hxhuang@fudan.edu.cn
  • Supported by:

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

摘要:

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)22+/3+ immobilized on the nano-SiO2 particles.

关键词: Doped poly(methyl methacrylate)(PMMA) film, Electrochemistry, Fluorescence, Ru complex, Silica nanohybrid

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)22+/3+ immobilized on the nano-SiO2 particles.

Key words: Doped poly(methyl methacrylate)(PMMA) film, Electrochemistry, Fluorescence, Ru complex, Silica nanohybrid