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Issue 33, 2011
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Ruthenium–bipyridine complexes bearing fullerene or carbon nanotubes: synthesis and impact of different carbon-based ligands on the resulting products

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Abstract

This paper discusses the synthesis of two carbon-based pyridine ligands of fullerene pyrrolidine pyridine (C60–py) and multi-walled carbon nanotube pyrrolidine pyridine (MWCNT–py) via1,3-dipolar cycloaddition. The two complexes, C60–Ru and MWCNT–Ru, were synthesized by ligand substitution in the presence of NH4PF6, and Ru(II)(bpy)2Cl2 was used as a reaction precursor. Both complexes were characterized by mass spectroscopy (MS), elemental analysis, nuclear magnetic resonance (NMR) spectroscopy, infrared spectroscopy (IR), ultraviolet/visible spectroscopy (UV-VIS) spectrometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and cyclic voltammetry (CV). The results showed that the substitution way of C60–py is different from that of MWCNT–py. The C60–py and a NH3 replaced a Cl and a bipyridine in Ru(II)(bpy)2Cl2 to produce a five-coordinate complex of [Ru(bpy)(NH3)(C60–py)Cl]PF6, whereas MWCNT–py replaced a Cl to generate a six-coordinate complex of [Ru(bpy)2(MWCNT–py)Cl]PF6. The cyclic voltammetry study showed that the electron-withdrawing ability was different for C60 and MWCNT. The C60 showed a relatively stronger electron-withdrawing effect with respect to MWCNT.

Graphical abstract: Ruthenium–bipyridine complexes bearing fullerene or carbon nanotubes: synthesis and impact of different carbon-based ligands on the resulting products

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Publication details

The article was received on 14 Mar 2011, accepted on 10 Jun 2011 and first published on 18 Jul 2011


Article type: Paper
DOI: 10.1039/C1DT10417A
Citation: Dalton Trans., 2011,40, 8353-8360
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    Ruthenium–bipyridine complexes bearing fullerene or carbon nanotubes: synthesis and impact of different carbon-based ligands on the resulting products

    Z. Wu, R. Huang, S. Xie and L. Zheng, Dalton Trans., 2011, 40, 8353
    DOI: 10.1039/C1DT10417A

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