SYNTHESIS AND SPECTRAL STUDIES OF POLYMER-BOUND FREE-BASE PORPHYRINS WITH SCHIFF-BASE LINKAGE

Aldehyde function has been introduced into 2% divinylbenzene (DVB)-cro sslinked polystyrene backbone through polymer analogous reactions. Mon o amino and tetra amino porphyrins have been synthesised and anchored to the polystyrene matrix through a Schiff base condensation. The reac tion provides typical polymer-bound porphyrins with rigid polymer-porp hyrin linkage. The bonding positions have been adjusted to get ortho, meta, and para derivatives of polymeric porphyrins and this has been a chieved by using suitably substituted amino porphyrins. The products h ave been characterised by chemical and spectroscopic methods. The vari ation in the spectral results of ortho, meta and para compounds are ex plained on the basis of the steric and electronic participation of the polymeric matrix on the electronic levels of the porphyrin macrocycle .