Atomic Force Microscopic Observation of the Molecular Orientation in Ultrathin Films of Alkanoic Acid-Derivatized Porphyrins on a Mica Surface
Abstract:The observation of the molecular orientation of alkanoic acid-derivatized porphyrins in ultrathin films deposited on mica was carried out by atomic force microscopy. It was observed that the tetraacid derivative 5,10,15,20-tetra(N-10-carboxydecyl-pyridinium-4-yl) porphyrin was arranged as a monolayer with the porphyrin macrocycle oriented coplanar to the mica surface. On the other hand, the diacid derivative protoporphyrin IX Zn(II) formed a bilayer with the hydrophobic part inside and the hydrophilic part in the periphery. Therefore, in this case, the porphyrin macrocycle is roughly perpendicular to the mica surface.
Document Type: Communications
Affiliations: 1: Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan; Faculty of Science, Nagoya University, Nagoya 464-8602, Japan 2: Faculty of Science, Nagoya University, Nagoya 464-8602, Japan 3: Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan
Publication date: February 1, 2002
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