A study on the interactions of cationic porphyrin with nano clay platelets in Layer-by-Layer (LbL) self assembled films

作者：Bhattacharjee J; Banik Soma; Hussain S A; Bhattacharjee D^*

来源：Chemical Physics Letters, 2015, 633: 82-88.

DOI：10.1016/j.cplett.2015.05.021

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.

• 出版日期2015-7-16