Synthesis and Characterization of Zirconium (IV) Derivatives of Meso-tetra(p-methylphenyl)porphyrin with Acetylacetonate and Different Phenolates at Axial Positions

In continuation with the previous research work carried out with axially ligated Zirconium(IV)pmethoxy-meso-tetraphenylporphyrin[Zr(p-OCH 3 TPP)(Y)(X) [Y = acac and X = different phenolates] here we have undertaken to synthesize meso-tetra(p-methylphenyl) porphinatozirconium (IV) acetylacetonatophenolates containing different phenols as axial ligands i. e. [Zr(p-CH 3 TPP)(Y)(X)] [Y=acac and X=different phenolates] by the reaction of meso-tetra(p-methylphenyl)porphyrin (pCH3H2TPP) with Zirconium(IV)acetylacetonate (Zr(acac)4) and different phenols at 200-220°C. The separation and isolation of these compounds were achieved through chromatographic methods and their characterization were done by Electronic absorption spectra, IR spectra, 1 H NMR, elemental analysis and mass spectroscopy. The incorporation of metal ion in the porphyrin ring was confirmed by IR spectra by appearance of Zr-N band at 457-502cm -1 , Zr-O band at 649680cm -1 and also the incorporation of (acac)(C5H7O2) in which Zr-O band appeared at 702818cm-1.The absorption spectra of these compounds showed one soret band i.e., B(0,0), two normal Q bands i.e., Q(0,0), Q(1,0) and one shoulder Q(2,0). The 1 H NMR spectra showed upfield (shielded) as compared to meso-tetra(p-methylphenyl)porphyrin (p-CH 3 H 2 TPP). The Mass spectra determined m/z ratio’s which agreed well with calculated m/z values and percentage of various elements in these compounds were confirmed by elemental analysis.