Magnetic spin effect detected by photoluminescence of polymers with a system of conjugated bonds. Poly-p-phenylene and poly-p-phenylene vinylene

Magnetic spin effect (MSE) detected by in photoluminescence is used to expl ore the effect of conjugated-chain length and crystallinity of polymer film s on conversion of the energy of electronically excited states in conjugate d polymers like poly-p-phenylene and poly-p-phenylene vinylene. Spin-depend ent processes related to geminate recombination of charges are studied. The role of the intermediate state with charge transfer between neighbouring p olymer chains is ascertained. Relative positions of the energy levels of ch arge-transfer states are determined from the temperature dependence of MSE.