Four dibenzotetrathiafulvalene (DB-TTF) derivatives (3a～b, 4a～b) were synthesized . their ^1H NMR, ^1^3C NMR, Mass, and UV asorption spectra as well as cyclic voltammetry data (CV) were given , CV behaviours of these compounds were compared with that of DB-TTF. It was indicated that thio-ketonic groups substituted at the terminals of DB-TTF gave a larger first oxidation potential and a less coulomb interaction. Meanwhile, four alkoxy groups located at the periphery of the molecule gave only a little change of the properties of the parent molecule .

Key words: SYNTHESIS, ELECTROCHEMICAL ANALYSIS, TETRATHIAFULVALENE, BENZO-, CYCLOVOLTAMGRAPH, OXIDATION -REDUCTION POTENTIAL