Electric Conductivity of 7, 7, 8, 8-Tetracyanoquinodimethane Salts of Cationic Polymers Containing Piperidine, Morpholine, and Tetrahydro-1, 4-thiazine Ring

Abstract

The salts of cationic polymer containing piperidine, morpholine and tetrahydro-1, 4-thiazine ring in a main chain with 7, 7, 8, 8-tetracyanoquinodimethane(CQ) were prepared and their specific resistivities (p) and activation energies of conduction (Ea) were measured. A general structure formula of the salts wasshown as follows;

x:c, o, s, p=3, 6, q=0.0, 0.2, 0.4, 0.6, 0.8, 1.0
Minimum resistivities, pmin, of these eomplex salts were about 102Ω.cm in allsystems. The values were one tenth in comparison with n, m-Ionene-CQ type of complex salts and also Ea values were small. Resistivity, p of 3DMX-CQ (X:O, p=3, q=O.O) simple salt (2.2x103 Ω.cm) was very small, though the effect of dopedCQ0 for electric conductivity was not observed. But the doping effect of CQ0 for6 DMX-CQ (X:O, P=6) was remarkable for electric conductivity. It may be conjectured from these results that hetero-ring and oxygen atom play a role in the available arrangement of CQ for conductivit.
On the contrary, the degradation of CQ salt was promoted by the existence of polar group (oxygen, sulfur atom), whichmay be related to adsorption of moisture.