Synthesis and Characterization of Monosubstituted TTF and Its Solvent Dependent Mono- and Dication Charge-Transfer Salts

The synthesis and characterization of the novel asymmetric 1-(4-(tetrathiafulvaleneyl)phenyl)ethanone (TTF-PEO) toward the precursor for multifunctional material are described. The tuning of the charge-transfer of TTF-PEO by solvent was realized forming the mono- and dication complexes (TTF-PEO)2CuBr4 and (TTF-PEO)2(CuBr4)2·CH2Cl2·CH3CN in the triclinic P1̅ and the orthorhombic Pbca space group, respectively. The antiferromagnetic behavior for the monocation radical TTF-PEO+• salt with CuBr42− displayed obvious phase transition at 110−120 K.