Abstract
In the present communication, interaction of tetracationic porphyrin, 5,10,15,10-tetrakis (1-methyl-4-pyrindino) porphyrin tetra (p-toluenesulfonate) (TMPyP) with anionic nano clay platelets laponite has been studied in aqueous clay dispersion and Layer-by-Layer (LbL) self assembled film. Electrostatic adsorption of TMPyP molecules on clay platelets resulted in the flattenening of meso-substituent groups which led to the development of a new adsorbed band in the UV–vis absorption spectra. J-band was also formed due to overlapped organizations of organo-clay hybrid molecules in the LbL film leading to J-aggregates. Atomic force microscopic (AFM) studies gave visual evidence of this favoured organization in the monolayer LbL film.
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