One-Electron Reduction of an "Extended Viologen" p-Phenylene-bis-4,4'-(1-aryl-2,6-diphenylpyridinium) Dication

Alison Funston, James P. Kirby, John R. Miller, Lubomír Pospíšil, Jan Fiedler, Magdaléna Hromadová, Miroslav Gál, Jaroslav Pecka, Michal Valášek, Zbigniew Zawada, Pawel Rempala, and Josef Michl

J. Phys. Chem. B, 109, 10862-10869 (2005). [Find paper at ACS Publications]

Abstract:

One-electron reduction of the "extended viologen" dication 1 yields the red cation radical 2, characterized by strong near-IR absorption. It has been generated and studied by pulse radiolytic, electrochemical, redox titration, UV-visible, and electron paramagnetic resonance spectroscopic methods. All results are in agreement with a fully delocalized electronic structure for 2.