Electric conductivity of TCNQ salts of ionene polymers containing triethylenediammonium or 4,4′‐bipyridilium ring

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Abstract
The ionene polymers were prepared by the Menshutkin reaction of α,ω‐dibromoalkane (n) with triethylenediamine (TDA) or 4,4′‐bipyridil (BP). Resistivities (p) and activation energies of conduction (Ea) were measured for the polymeric 7,7,8,8‐tetracyanoquinodimethan (TCNQ) salts with these ionenes. The correlation between the chemical structure of the ionenes and the conductivity was discussed. In the TDA,n‐TCNQ complex salts and the BP,n‐TCNQ simple salts the salts of the ionenes containing even numbers of CH2 groups showed higher conductivities than those of the ionenes containing odd numbers of CH2 groups. The conductivities determined by the narrower interval between the N+ cations of the main chains were measured in the simple salts. In the complex salts the conductivities determined by the larger interval were measured. The conformational change of the matrix ionenes affected the arrangement of the TCNQ molecules. The values of p were 79.7 and 12.5 Ω cm, and the values of Ea were 0.122 and 0.063 eV for TDA,4‐TCNQ complex salt and BP,5‐TCNQ complex salt, respectively.