Thermomagnetic Molecular System Based on TTF-PTM Radical: Switching the Spin and Charge Delocalization
28 October 2013
M. Souto, J. Guasch, V. Lloveras, P. Mayorga, J. T. López Navarrete, J. Casado, I. Ratera, C. Rovira, A. Painelli and J. Veciana
J. Phys. Chem. Lett. 2013, 4, 2721−2726
The electron donor−acceptor dyad 1, based on a polychlorotriphenylmethyl radical subunit linked to a tetrathiafulvalene moiety, shows in DMF solution a reversible temperature-induced switching between diamagnetic dimers, observed at room temperature, and paramagnetic monomers at high temperature. Different optical and magnetic properties are observed for the two states of this supramolecular switch, related to the subtle interplay between intramolecular electron-transfer and intermolecular charge-transfer processes.