Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 80, Issue 7, Pages 1350-1356Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.80.1350
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Complexes formed with synthetic clay minerals and dicationic and tetracationic porphyrins were prepared. The Soret bands of the multicationic porphyrins shifted to longer wavelength upon the formation of a complex with clay. The clay sheets themselves and the porphyrin molecules on the clay surface were examined by use of atomic force microscopy (AFM) and polarized visible-light-attenuated total reflectance (ATR) spectroscopy (PV-ATR) with a wave-guide system. The flat adsorption of the clay sheets on the glass substrates was confirmed by AFM. A theoretical treatment of the analysis by ATR spectroscopy was derived. The orientations of the multicationic porphyrin molecules on the clay sheets in water turned out to be nearly parallel (< 5 degrees) to the clay surface, based on the PV-ATR analysis.
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