Synthesis And Catalytic Performance Of Bis-ferrocene Modified Porphyrin And Its Transition Metal Complexes

As a new direction for the research of burning rate catalysts,the bis-ferrocene derivatives have a higher catalytic activity than ferrocene.In order to further increase the content of iron in the compound and introduce the bonding of heteroatoms with other components in the solid propellant to reduce the migration effect,we designed and synthesized a series of new bis-ferrocene compounds,which are expected to express excellent performance in terms of burning rate catalyst.The bis-ferrocene group is linked to the porphyrin by a click reaction and coordinated to the metal in the porphyrin cavity.Two different bis-ferrocene modified porphyrin ligands and eight metal porphyrin complexes were synthesized.The synthesized porphyrin ligands and metal complexes were characterized by NMR,HRMS,IR.The properties were tested by UV-visible and fluorescence spectroscopy.It was found that the UV absorption of nickel,cobalt and copper complexes was blue-shifted relative to the ligand,and the UV absorption of the zinc complex was red-shifted.At the same time,the introduction of ferrocene and metals caused strong fluorescence quenching of porphyrins.It shows that there is strong electron or energy transfer between ferrocene,porphyrin ring and metal ion.By thermogravimetric analysis,the synthesized compound can be stably present in ammonium perchlorate and can effectively reduce the thermal decomposition temperature of ammonium perchlorate.The results of the mobility test of the simulated drug column showed that the series of porphyrin ligands and metalloporphyrin have excellent migration resistance.