Synthesis and study of optically active polydendrimers

The first optically active polydendrimers have been synthesized by polymeri zation of binaphthyl-based dendrimers. Study of the chiral optical properti es of the polydendrimers and their model compounds has revealed that the in teraction of the dendritic side chains along the polybinaphyhyl backbone ca nnot induce a secondary helical conformation. Energy migration from the den dritic side chains to the more conjugated bolybinaphthyl main chain is obse rved through absorption and fluorescence spectroscopic studies. As the dend ritic generation increases, the glass transition temperature of the polyden drimers decreases significantly, The dendritic substituents have made consi derable influence on the thermal transition of the polybinaphthyls.