CHROMATOGRAPHIC PROPERTIES OF SOME PORPHYRIN LIGANDS AND THEIR METAL-COMPLEXES

The behavior of some porphyrin ligands (pheophytins a and b, protoporp hyrin IX, protoporphyrin IX dimethyl ester, 1,4,5,8-tetramethylporphyr in, and tetraphenylporphyrin) and their metal (Mg, Zn, Cu, Pd, Pt, and Pb) complexes is studied under the conditions of reversed-phase high- performance liquid chromatography (HPLC). Data on the separation of po rphyrin ligands and their metal complexes by HPLC are presented, and t he mechanisms of the sorbate-sorbent-eluant interactions are considere d. It is demonstrated that the chromatographic retention parameters of pigments depend on the structural features of the porphyrin moiety. T he results can be useful for the development of a unified rational sys tem for seeking efficient eluants for the analysis of porphyrins by HP LC.