On The Nature Of The Redox Species In (CH3)2N(C6H4)-CO2-Re(CO)3(1,10-Phenanthroline):

M. P. JULIARENA; R. O. LEZNA; G. T. RUIZ; M. R. FELIZ; G. FERRAUDI; E. WOLCAN

POLYHEDRON

Elsevier

Lugar: Amsterdan, Holanda; Año: 2007 vol. 27 p. 1471 - 1478

0277-5387

The UV–Vis absorption spectra of 4-dimethylaminobenzyl radical cation (DMAB·+) and 1,10-phenanthroline radical anion (phen·-) were obtained by spectroelectrochemistry, flash photolysis and pulse radiolysis experiments on DMAB–CO2–ReI(CO)3(phen) and DMAB–COOH. DMAB–CO2–ReI(CO)3(phen) was shown to have remarkable reversibly/stable redox processes under electrochemical perturbations. An excellent agreement was observed between the spectrum of the radical cation DMAB·+ obtained electrochemically and radiolytically. The in situ UV–Vis spectrum of the electrochemically reduced radical anions, phen·-, was compared with that obtained from the products of the reductive quenching of the corresponding photochemically excited states. Besides, the oxidative quenching of the ReI complex excited states by [NiII(Me6[14]-aneN4)] showed the formation of [(DMAB·+–CO2)–ReI(CO)3(phen)] as the main primary product.