Synthesis and characterization of a fully aromatic polyazomethine with main chain rotaxane architecture

A new aromatic polyazomethine with rotaxane. architecture containing a bloc king group in every structural unit has been synthesized by polycondensatio n of 3,6-diformyl-9-butyl carbazole with p,p'-diaminobiphenyl (benzidine)/b eta -cyclodextrin adduct. As compared with polymers obtained in the absence of beta -cyclodextrin, this polymer is more hygroscopic and soluble in pol ar solvents such as DMF and DMSO. The IR, H-1-NMR, GPC and DSC data support the presence of beta -cyclodextrin in the polymer chain. Measurements made by gel permeation chromatography of the DMF soluble main-chain polyrotaxan e show high molecular weight. This polymer is a light-yellow coloured produ ct and its electrical conductivity is as high as 10(-9) S cm(-1). Doping wi th iodine markedly increased the conductivity of the orange-brown coloured semiconductive. polyazomethine with a maximum conductivity of 10(-6) S cm(- 1).