SYNTHESIS AND PHYSICAL-PROPERTIES OF TCNQ CHARGE - TRANSFER SALTS OF AMINE COPPER OR NICKEL-COMPLEX CATIONS

Seven TCNQ charge-transfer salts of amine copper or nickel complex cat ions, [ML2] [TCNQ](n)(TCNQ=7,7,8,8-tetracyanoquinodimethane; n=2,3; M= Cu,Ni; L=tn,pn,dien,dmtade), have been synthesized. These charge-trans fer salts have been characterized by elemental analysis, infrared spec trum, electronic spectrum, electron paramagnetic resonance spectrum, X PS, susceptibility and conductivity. The results indicate that there a re TCNQ(0) and TCNQ(-) in the molecules of these charge-transfer salts as well as interaction between TCNQ(0) and TCNQ(-). The metals of the se compounds show mixed valence state because partial charges transfer from [TCNQ](n)(2-), to [ML2](2+). Room temperature conductivities of the seven samples are in 10(-5)-10(-10)S.cm(-1), therefore they belong to organic semiconductor. Their conductivities are mainly attributed to the formation of TCNQ molecular column of one dimension.