Abstract
Two kinds of metal complexes, an achiral metal complex, [Fe(terpy)]2+ (terpy = 2,2‘,2‘ ‘-terpyridyl), and a chiral metal complex, Δ-[Ni(phen)3]2+ (phen = 1,10-phenanthroline), were coadsorbed by colloidally dispersed sodium saponite clay. Interaction between these molecules on a clay surface was investigated by electric dichroism and circular dichroism measurements. The molecular orientation of an adsorbed [Fe(terpy)]2+ ion was determined in the absence or presence of Δ-[Ni(phen)3]2+ by electric dichroism measurements. The angle of the C2 axis of [Fe(terpy)]2+ with respect to a clay surface changed from 35.4° to 44.4° when the complex was coadsorbed with Δ-[Ni(phen)3]2+. The circular dichroism spectrum of a clay dispersion containing [Fe(terpy)]Cl2 and Δ-[Ni(phen)3]Cl2 was measured in the wavelength region of 350−600 nm. Δ-[Ni(phen)3]2+ had no electronic absorption in this region. Circular dichroism due to adsorbed [Fe(terpy)]2+ appeared when Δ-[Ni(phen)3]Cl2 was added to the ratio of [Fe(terpy)]Cl2/Δ-[Ni...
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