ADOSORPTION AND PHOTOCHEMICAL BEHAVIOR OF MONO-CATIONIC PORPHYRIN ONTO SYNTHETIC SAPONITE

Abstract

The adsorption and photochemical behavior of 5,10,15-triphenyl-20-mono(N-Methyl-4-pyridyl)porphyrin (MMPyP) were examined onto the clay surface in MeOH/water=1/9 (v/v). Absorption and fluorescence spectra were observed for MMPyP–clay complexes. MMPyP adsorbs on the clay surface in the manner where porphyrin ring is parallel to the clay surface and absorbs up to 25% vs. CEC of the clay. Fluorescence of MMPyP was strongly quenched as its adsorption density increased on the clay surface.