Issue 11, 2000

Synthesis, structure and redox properties of a new ruthenium(II) complex containing the flexible tridentate ligandN,N-bis(2-pyridylmethyl)ethylamine, cis-fac-Ru(bpea)22+, and its homologue attached covalently to a polypyrrole film

Abstract

New ruthenium complexes bearing tridentate ligands of general formula cis-fac-[RuIIL2][PF6]2 (L = N,N-bis(2-pyridylmethyl)ethylamine (bpea) 1 or N-[3-bis(2-pyridylmethyl)aminopropyl]pyrrole (bpea-pyr) 2) have been prepared following two different synthetic routes. They have been characterised by elemental analyses, UV-Vis and 1H NMR spectroscopy. Furthermore, the crystal structure of complex 1 has been solved. The Ru is co-ordinated in a distorted octahedral fashion by six N atoms of two bpea ligands which occupy opposite faces of the octahedron. The aliphatic N atoms of the bpea ligands are co-ordinated in a cis fashion. 1-D together with 2-D NMR spectra show that in solution 1 has the same structure as in the solid state and that complex 2 has the same structural arrangement. The redox properties of 1 and 2 have been investigated by cyclic voltammetry and coulometry. In the anodic region, the pyrrole group of complex 2 polymerises forming a modified electrode containing Pt/poly-2. This new material has been characterised by electrochemical techniques and displays a remarkable chemical and electrochemical stability.

Supplementary files

Article information

Article type
Paper
Submitted
02 Dec 1999
Accepted
06 Apr 2000
First published
08 May 2000

J. Chem. Soc., Dalton Trans., 2000, 1689-1694

Synthesis, structure and redox properties of a new ruthenium(II) complex containing the flexible tridentate ligand N,N-bis(2-pyridylmethyl)ethylamine, cis-fac-Ru(bpea)22+, and its homologue attached covalently to a polypyrrole film

I. Romero, M. Rodríguez, A. Llobet, M. Collomb-Dunand-Sauthier, A. Deronzier, T. Parella and H. Stoeckli-Evans, J. Chem. Soc., Dalton Trans., 2000, 1689 DOI: 10.1039/A909511J

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