Synthesis And Properties Of Imide-based Porphyrin

Porphyrin-type compounds have a wide range of application prospect in the materialchemistry, optics, physical chemistry because of their extensively conjugated π-system, andsuch a highly delocalized π-system is suitable for efficient electron transfer.It is importantbuilding blocks for new classes of organic conductors and polymers. Moreover, someexperiments have indicated: these higher polymer porphyrins are technologically veryimportant materials that essential to today’s high technology.Potentially, such compositesoffer mechanical flexibility, transparency, low-temperature processiblity, photoconductingmaterials.In this study, we have synthesized a new porphyrin-imide-based polymer, whichcontains both porphyrin ring and imide ring system. The main research was presented asfollows:First, we synthesized meso-5,15-(4-aminophenyl)-10,20-phenylporphyrin(TPP-NH2-2O) through a series of reactions; Then, meso-5,15-bis(4-trimellitimidoyl)-10,20phenylporphyrin(TPP-PAA) were synthesized by the condensation reaction ofTPP-NH2-2Oand trimellitic anhydride; Finally, the new polyimide containing porphyrin wasprepared by triphenyl phosphate activated polycondensation from the5,15-bis(4-trimellitimidoyl)-10,20phenylporphyrin (TPP-PAA)monomer with TPP-NH2-2O.The spectroscoPIc data of UV, FT-IR and1HNMR on the polyimide are described here.Futhermore, the characterization and physical properties of the new polyimide-basedporphyrin polymers, including inherent viscosity, solubilitity, and thermal stability, have alsobeen studied. which exhibited higher viscosity, excellent thermal stability and highersolubility, stronger mechanical properities. We also studied the optimal reaction conditionsfor the new polymer, the resulted showed as followed: N-methyl pyrrolidone (NMP) as thesolvent, anhydrous calcium chloride as catalyst, triphenyl phosphite and pyridine mixture forthe reductions, the reaction temperature was100℃, reaction time3~5h.