FORMATION OF LAYER-BY-LAYER COMPOSITE FILMS BY THE LANGMUIR-BLODGETT TECHNIQUE : SMECTITE AMPHIPHILIC RUTHENIUM(II) COMPLEX SYSTEMS

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Organized organic-inorganic ultrathin films have been constructed from the fabrication of smectite unit layers and an amphiphilic ruthenium (II) complex monolayer using the conventional Langmuir-Blodgett(LB) technique.According to the method, a chloroform solution of an amphiphilic ruthenium (II) complex, [Ru(phen)_2(dC18bpy)]^<2+> (phen=1, 10-phenanthroline, dC18bpy=4, 4′-dioctadecyl-2, 2′-bipyridyl as shown in Figure.1), was spread onto an aqueous subphase containing either exfoliated saponite or hectorite suspension.Brewster angle microscopy (BAM) observation showed that RU(II) complex molecules formed a self-assembled monolayer on a water surface and that clay particles were adsorbed by the monolayer from an aqueous subphase.A composite film of a Ru(II) complex and a clay particle thus formed was transferred onto a hydrophilic glass plate by the vertical dipping method.The surface structure of a deposited film was studied with an atomic force microscope(AFM).As a results, a glass substrate was convered with the single sheet of a clay on which amphiphilic metal complexes were attached.
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