Preparation of tetrabutylammonium salt of a mono-Ru(iii)-substituted α-Keggin-type silicotungstate with a 4,4′-bipyridine ligand and its electrochemical behaviour in organic solvents | Zendy

Shuhei Ogo | Zendy; Sachie Moroi | Zendy; Tadaharu Ueda | Zendy; Kenji Komaguchi | Zendy; Shinjiro Hayakawa | Zendy; Yusuke Ide | Zendy; Tsuneji Sano | Zendy; Masahiro Sadakane | Zendy

Open Access

Preparation of tetrabutylammonium salt of a mono-Ru(iii)-substituted α-Keggin-type silicotungstate with a 4,4′-bipyridine ligand and its electrochemical behaviour in organic solvents

Author(s) -

Shuhei Ogo,

Sachie Moroi,

Tadaharu Ueda,

Kenji Komaguchi,

Shinjiro Hayakawa,

Yusuke Ide,

Tsuneji Sano,

Masahiro Sadakane

Publication year - 2013

Publication title -

dalton transactions

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.98

H-Index - 184

eISSN - 1477-9234

pISSN - 1477-9226

DOI - 10.1039/c3dt50300c

Subject(s) - chemistry , acetonitrile , ligand (biochemistry) , ruthenium , inorganic chemistry , derivative (finance) , cyclic voltammetry , salt (chemistry) , bipyridine , single crystal , electrochemistry , medicinal chemistry , crystal structure , crystallography , organic chemistry , catalysis , electrode , financial economics , economics , biochemistry , receptor

The tetrabutylammonium (TBA) salt of a mono-ruthenium(III)-substituted α-Keggin-type silicotungstate with a 4,4'-bipyridine (bipy) ligand, TBA5[α-SiW11O39Ru(III)(bipy)] (1), which is soluble in various organic solvents, was prepared by a cation exchange reaction of Cs5[α-SiW11O39Ru(III)(bipy)] with tetrabutylammonium bromide. Compound 1 was characterised using IR, (1)H-NMR, elemental analysis, single crystal X-ray analysis, X-ray absorption near-edge structure (XANES) analysis (Ru L3-edge), electron spin resonance (ESR), cyclic voltammetry (CV) and UV-Vis. Single crystal X-ray analysis of 1 revealed that the Ru(III) unit was incorporated into the α-Keggin-type silicotungstate framework and coordinated by a bipy molecule through a Ru-N bond. CV indicated that the incorporated Ru(III)-bipy was reversibly oxidised to the Ru(IV)-bipy derivative and reduced to the Ru(II)-bipy derivative in organic solvents. The redox potential of Ru(IV/III)-bipy was found to be affected by organic solvents. Moreover, the Ru(V)-bipy derivative was observed in acetonitrile.

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