Preparation and characterization of new optically active poly(amide-imide)s and poly(ester-imide)s containing calix[4]arene units

Abstract

This article describes the synthesis and characterization of new optically active polymers contain ing upper rim calix[4]arene from the polycondensation reaction of 5,11,17,23 tetra tert butyl 25,27 bis[(4 aminobenzyloxy) 6,28 dihydroxy] calix[4]arene with N,N' pyromellitoylimido bis L alanine diacid chlo ride (6a) and N,N' pyromellitoylimido bis L phenyl alanine diacid chloride (6b). This optically active diacidchlorides 6a and 6b have been prepared from the reaction of pyromellitic dianhydride with two chiral amino acids, alanine and phenyl alanine. The chiral poly(amide imide)s and poly(ester imide)s obtained in good yield and moderate inherent viscosity. All the polymers have been fully characterized by FTIR, 1 H NMR spectroscopy and elemental analysis.