Synthesis of poly(biphenylene ruthenacyclopentatrienylene), a new organometallic conducting polymer with ferromagnetic interaction in its reduced state

Masashi Kurashina; Masaki Murata; Tokuko Watanabe; Hiroshi Nishihara

doi:10.1021/ja036934f

Synthesis of poly(biphenylene ruthenacyclopentatrienylene), a new organometallic conducting polymer with ferromagnetic interaction in its reduced state

J Am Chem Soc. 2003 Oct 15;125(41):12420-1. doi: 10.1021/ja036934f.

Authors

Masashi Kurashina¹, Masaki Murata, Tokuko Watanabe, Hiroshi Nishihara

Affiliation

¹ Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-Ku, Tokyo 113-0033, Japan.

PMID: 14531680
DOI: 10.1021/ja036934f

Abstract

A ruthenacyclopentatriene polymer 2 was synthesized by metallacycling polymerization (MCP). Polymer 2 with Mn = 3400 and Mw = 5800 consisted of identical ruthenacyclopentatriene units. The UV-vis spectra of 2 showed a shift of the pi-pi* band to a longer wavelength due to the enlargement of the pi-conjugation. Polymer 2 underwent reversible reduction due to the ruthenacycle moiety at -1.01 V versus ferrocenium/ferrocene. The EPR spectrum of the reduced form of 2 in frozen THF indicated ferromagnetic interaction of spins at ruthenacyclopentatriene units.