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

摘要

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 M?ssbauer spectra.