Abstract

Adsorption, aggregation, and photochemical behavior of a cationic cyanine dye (5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolylcarbo-cyanine chloride (JC-1)) on an inorganic layered material were examined. JC-1 formed J-aggregates on the clay surface even at a low loading level. The structure of the J-aggregate was determined through analysis using the extended dipole model proposed by Kuhn et al. Aggregation number and slip angle of the J-aggregate on the clay surface were calculated as more than 8 molecules and 20–22°, respectively. The J-aggregate on the clay sheet exhibited high fluorescence quantum yield (0.4), thus, this complex will be promising to construct photochemical reaction systems such as artificial light harvesting systems.

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