Abstract

Gauri D. Bajju*, Sunil Kumar Anand and  Sujata Kundan

Reaction of p-methoxy-meso-tetraphenylporphyrin(p-OCH3H2TPP) with Zirconium(IV) acetylacetonate(Zr(acac)4) and phenols at 200-220°C results in the formation of correspondimg axially ligated Zirconium(IV)-p-methoxy-mesotetraphenylporphyrin [Zr(p-OCH3TPP)(Y)(X)] [Y=acac and X=different phenolates]. The separation and isolation of these compounds have been achieved through chromatographic methods and characterized by 1HNMR, Electronic absorption spectra, IR spectra, elemental analysis and mass spectroscopy. Inseration of metal ion in the porphyrin ring is confirmed by absorption spectroscopy which shows normal two Q bands i.e., Q(0,0), Q(1,0) and one shoulder Q(2,0). The 1H NMR spectra of Zr(IV)porphyrins show upfield(shielded) compared to meso-tetraphenylporphyrin(H2TPP). IR spectra confirm the appearance of Zr-N at 457-502cm-1, Zr-O at 649-680cm-1 and also the incorporation of (acac)(C5H7O2) in which Zr-O is at 702-818cm-1. Mass spectra determine m/z ratio and percentage of each element is confirmed by elemental analysis.

Zirconium (IV) derivatives; Acetylacetonate; Axial positions

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