Study On The Synthesis, Characteriztion And Properties Of Terpyridine And Their Metal Complexes

In order to investigate the spectral properties of compounds with rigid conjugation structure, the ferrocenylterpyridine with 4’-functionallized structure and a series of its transition metal complexes were synthesized. For a comparative study on the synthetical ligand, the chlorophenylterpyridine ligand and its transition metal complexes were synthesized. The composition and structure of the two ligands and their complexes and the luorescence quenching of ferrocene on transition metal complexes were studied.4-ferrocenyl-2,2′:6′,2″-terpyridine was prepared by reaction of 2-acetylpyridine with formylferrocene under potassium tert-butanol as catalyst. A series of transition metal complexes were successfully synthesized by reacting of ferrocenylterpyridine ligand and transition metal manganese, iron, cobalt, nickel, zinc, ruthenium salt in anhydrous ethanol, respectively.The spectrums of the synthesis ligand and coordination compounds were studied by IR, UV, 1H NMR, 13C NMR and other characterization methods, and some interesting results were obtained. The results of the UV spectrum show that appearing MLCT (metal to ligand charge transfer), the expansion of the conjugated system enhanced transport capacity of electron, and the broud was red shift. The results of spectroelectrochemistry show that when a certain fixed voltage was applied, the metal ions of complexes were oxidized, the ability complex to give and transfer electron was reduced, and the intensity of MLCT band decreased. The results of fluorescence spectroscopy show that the rigid structure of the complex is not fluorescent, and the possible factors resulted in luorescence quenching were speculated.The explorative experiment for preparing terpyridine Cobalt carbonyl cluster was performed. The terpyridine Cobalt carbonyl cluster was synthesized by reaction of Co2(CO)8 with Tpy-Ph-C≡C-Si(CH3)3 using benzene as the solvent. Infrared spectroscopy shows that the new cluster have the characteristic absorption peak of ligand and strong absorption peaks of carbonyl, which indicating the coordination of Cobalt carbonyl and ligand.