Electrochemical behavior of phosphine-substituted ruthenium(II) polypyridine complexes with a single labile ligand

Go Nakamura, Masaya Okamura, Masaki Yoshida, Takayoshi Suzuki, Hideo D. Takagi, Mio Kondo, Shigeyuki Masaoka

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A series of phosphine-substituted ruthenium polypyridine complexes, cis(P,Cl)-[Ru(trpy)(Pqn)Cl]PF6 (cis-Cl), trans(P,MeCN)-[Ru(trpy)(Pqn) (MeCN)](PF6)2 (trans-PN), cis(P,MeCN)-[Ru(trpy)(Pqn)(MeCN) ](PF6)2 (cis-PN), and [Ru(trpy)(dppbz)(MeCN)](PF 6)2 (PP), were synthesized and crystallographically characterized (trpy = 2,2′:6′,2″-terpyridine, Pqn = 8-(diphenylphosphanyl)quinoline, and dppbz = 1,2-bis(diphenylphosphanyl)benzene) . In electrochemical measurements for cis-PN and PP, the reduction of cis-PN resulted in the formation of trans-PN via cis-trans isomerization and that of PP proceeded via a two-electron-transfer reaction. The mechanism of the electrochemical behaviors is discussed through consideration of five-coordinated species, [Ru(trpy)(Pqn)]n+ or [Ru(trpy)(dppbz)]n+ (n = 0-2), formed by liberation of a monodentate labile ligand.

Original languageEnglish
Pages (from-to)7214-7226
Number of pages13
JournalInorganic Chemistry
Volume53
Issue number14
DOIs
Publication statusPublished - Jul 21 2014

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phosphine
Ruthenium
quinoline
Isomerization
Benzene
phosphines
isomerization
ruthenium
electron transfer
benzene
Electrons
Ligands
ligands

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Medicine(all)

Cite this

Electrochemical behavior of phosphine-substituted ruthenium(II) polypyridine complexes with a single labile ligand. / Nakamura, Go; Okamura, Masaya; Yoshida, Masaki; Suzuki, Takayoshi; Takagi, Hideo D.; Kondo, Mio; Masaoka, Shigeyuki.

In: Inorganic Chemistry, Vol. 53, No. 14, 21.07.2014, p. 7214-7226.

Research output: Contribution to journalArticle

Nakamura, Go ; Okamura, Masaya ; Yoshida, Masaki ; Suzuki, Takayoshi ; Takagi, Hideo D. ; Kondo, Mio ; Masaoka, Shigeyuki. / Electrochemical behavior of phosphine-substituted ruthenium(II) polypyridine complexes with a single labile ligand. In: Inorganic Chemistry. 2014 ; Vol. 53, No. 14. pp. 7214-7226.
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abstract = "A series of phosphine-substituted ruthenium polypyridine complexes, cis(P,Cl)-[Ru(trpy)(Pqn)Cl]PF6 (cis-Cl), trans(P,MeCN)-[Ru(trpy)(Pqn) (MeCN)](PF6)2 (trans-PN), cis(P,MeCN)-[Ru(trpy)(Pqn)(MeCN) ](PF6)2 (cis-PN), and [Ru(trpy)(dppbz)(MeCN)](PF 6)2 (PP), were synthesized and crystallographically characterized (trpy = 2,2′:6′,2″-terpyridine, Pqn = 8-(diphenylphosphanyl)quinoline, and dppbz = 1,2-bis(diphenylphosphanyl)benzene) . In electrochemical measurements for cis-PN and PP, the reduction of cis-PN resulted in the formation of trans-PN via cis-trans isomerization and that of PP proceeded via a two-electron-transfer reaction. The mechanism of the electrochemical behaviors is discussed through consideration of five-coordinated species, [Ru(trpy)(Pqn)]n+ or [Ru(trpy)(dppbz)]n+ (n = 0-2), formed by liberation of a monodentate labile ligand.",
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