Donor-acceptor complexes of poly-N-vinylcarbazole

1. The donor-acceptor interaction between poly-N-vinylcarbazole (PVC) of molecular weight ¯Mw =3·104 and 1·103 withπ-acceptors tetracyanoethylene, tetracyanoquinonedimethane, chloranil, and bromanil, in the solvents dichloroethane and tetrachloroethane was studied spectrophotometrically. The equilibrium constant and molar extinctions of the complexes formed at various temperatures were calculated. 2. The equilibrium constants of these complexes for PVC ¯Mw=3·104 are practically independent of the temperature, just as for the complexes of the low-molecular-weight analog. The indicated differences of the low-molecular-weight complexes from the polymer complexes are explained by the temperature changes in the structure of the macromolecular balls in the solutions. 3. When tetrachloroethane is used as a solvent for PVC, practically no polymeric specifics in the processes of complex formation are detected.