SYNTHESIS OF SOLUBLE CONJUGATED METALLOPORPHYRIN POLYMERS WITH TUNABLE ELECTRONIC-PROPERTIES

New linear conjugated porphyrin polymers are synthesized by a palladiu m-catalyzed cross-coupling reaction of 5,15-bis(ethynyl)-10,20-bis(mes ityl)porphyrin]zinc and diiodobenzene derivatives; enhanced solubility of the conjugated porphyrin polymers is achieved by attachment of lon g alkyl ether or dialkyl amide groups to the aryl moiety, resulting in unambiguous characterization by H-1 NMR, IR, GPC, UV-VIS and fluoresc ence spectroscopy; in addition, the introduction of alkyl ether (elect ron donor) or dialkyl amide (electron acceptor) results in significant modulation of the electronic properties of the conjugated porphyrin p olymers owing to strong electronic coupling.