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Intramolecular electron transfer and charge delocalization in bistable donor-acceptor systems based on perchlorotriphenylmethyl radicals linked to ferrocene and tetrathiafulvalene units

Abstract:

A comparative analysis of the physicochemical properties of different donor-acceptor dyads, based on a perchlorotriphenylmethyl radical acceptor subunit linked through a vinylene π-bridge to ferrocene derivatives (1-3) or a tetrathiafulvalene (4) donor subunit, is presented. Intramolecular electron transfer and charge delocalization of these donor-acceptor dyads are discussed on the basis of data obtained in solution by cyclic voltammetry, UV-Vis near-infrared, and electron spin resonance spectroscopies. Bistability in the crystalline phase is also discussed on the basis of the results provided by X-ray diffraction analysis and temperature-dependent Mössbauer spectra. © 2014 John Wiley & Sons, Ltd.