Electronic spin lattice relaxation in oligoarylenes in the naphthalene-benzene copolymer

Abstract

Spin-lattice relaxation of paramagnetic centres in the naphthalene-benzene copolymer and in the products of its pyrolysis has been investigated in some detail at various temperatures. It appears from the experimental results that two-step Orbach-Aminov type relaxation processes take place in the pyrolyzed samples, and may be accounted for satisfactorily through the relaxation model in terms of exchange-bound clusters. The results of the relaxation measurements are compared with the data obtained by infrared, and by elemental analysis and X-ray studies. © 1986.