Preparation and Characterization of Persistent Maltose-Conjugated Triphenylmethyl Radicals
journal contributionposted on 22.02.2016, 08:09 authored by Juan Antonio Mesa, Amado Velázquez-Palenzuela, Enric Brillas, Josep Coll, Josep Lluís Torres, Luis Juliá
The condensation reaction of d-maltose to free radicals of the series of tris(2,4,6-trichlorophenyl)methyl (TTM) and tris(perchlorophenyl)methyl (PTM) has been described for the first time. The new persistent radicals 1 and 2 are very stable and have been characterized by EPR. Their cyclic voltammograms show a quasi-reversible process in the cathode, being reduced to the corresponding anions, with redox potentials a little lower than those of TTM and PTM, respectively. Their oxidant activity is in close relation with their reduction potentials. Therefore, while 2 is reduced by ascorbic acid, 1 remains unaltered.