Synthesis and properties of PDT- and TPDT-TTP derivatives

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Abstract Several derivatives of bis-fused donors, 2-(1,3-dithiol-2-ylidene)-5-(pyran-4-ylidene)-1,3,4,6-tetrathiapentalene (PDT-TTP) and its thiopyran analogue (TPDT-TTP) have been prepared. Electrochemical properties of these donors were investigated by means of cyclic voltammetry and the X-ray crystal structure analysis was performed for bis(methylthio)-TPDT-TTP. The electrical conductivities of their TCNQ complexes and cation radical salts are fairly high (10 −1 − 10 2 S•cm −1 ), and several salts show metallic temperature dependence of conductivity.

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