Synthesis and Photo Valence Isomerization of Polyamide Bearing Norbornadiene Unit
Polyamides bearing norbornadiene (NBD) unit were prepared by the reaction of either bis(p-nitrophenyl) 2,3-NBD-dicarboxylate or a mixed anhydride bearing the NBD moiety with various diamines.Films made of the polyamides indicated reversible UV-spectrum ch