Synthesis and Characterization of Tetrathiafulvalene Charge Transfer Compounds with Copper Halides.

摘要

Charge transfer compounds with the general formula (TTF)4CuX2 (TTF = tetrathiafulvalene; X = chlorine, bromine may be prepared by the reaction of excess TTF with Cu(sparteine) X2 in methylene chloride. The semiconducting compounds have low activation energies and relatively high electrical conductivities. Magnetic susceptibility, EPR and spectroscopic data have low activation energies and relatively high electrical conductivities. Magnetic susceptibility, EPR, and spectroscopic data provide evidence that copper has been reduced to copper(I) in the complexes, and the unpaired electrons are delocalized over columnar stacks of TTF. Reaction of TTF with (Cu(2-aminoethylpyridine) Cl2) or (Cu(nicotine)Cl2) in methylene chloride yielded (TTF)2CuCl2, while reaction of TTF with (Cu4OCl6(2-picoline)4) yielded (TTF)CuCl2.