Different spectroscopic and photoelectrochemical behaviors were observed when racemic and enantiomeric [Ru(bpy) 3 ] 2+ complexes were intercalated in the interlayer of K 4 Nb 6 O 17, even for the same intercalation amount. The results are interpreted in terms of the stronger interaction between racemic [Ru(bpy) 3 ] 2+ molecules in the interlayer spaces of K 4 Nb 6 O 17 . The faster emission decay and lower photocurrent of the racemic [Ru(bpy) 3 ] 2+ −K 4 Nb 6 O 17 compound compared to the enantiomeric ones suggest that stronger concentration quenching exists between the racemic [Ru(bpy) 3 ] 2+ ions in the interlayer of K 4 Nb 6 O 17 . Combining the spectroscopic and photoelectrochemical results, the racemic [Ru(bpy) 3 ] 2+ ions are considered to intercalate more densely than the enantiomeric [Ru(bpy) 3 ] 2+ ions in the interlayer of K 4 Nb 6 O 17, even for the same intercalation amount. Two cationic dyes were also directly intercalated into K 4 Nb 6 O 17 . The spectroscopic and photoelectrochemical behaviors of the dye−K 4 Nb 6 O 17 compounds were investigated.
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Yao et al. (2002) studied this question.
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