HOW DOES THE POLYMER MAIN CHAIN INFLUENCE THE SIDE-CHAIN MOBILITY - A FLUORESCENCE PROBE STUDY BY MEANS OF TWISTED INTRAMOLECULAR CHARGE-TRANSFER PHENOMENA

The authors prepared poly(methyl methacrylate) (PMMA) containing a very small amount of DMAB chromophore attached to the side chain via an alkyl chain of variable length. Close study of TICT (Twisted Intramolecular Charge-Transfer) fluorescence in dilute solution revealed that the fluorescence behaviors are dependent on the length of spacer as well as on the chain conformation. It is apparent that small rotational motion in the side chain is controlled by the polymer main chain even in very dilute solutions.