SPECTROSCOPIC CHARACTERIZATION OF NIAGARA BLUE DYE IN THE RESTRICTED GEOMETRY OF LAYER-BY-LAYER SELF-ASSEMBLED FILMS

Author:

GHOSH INDRA1,DAS BANDANA1,NATH RANENDU KUMAR1,GANGULY BANTI2,MISHRA BIJAY KUMAR3,PAL AJITESH3

Affiliation:

1. Department of Chemistry, Tripura University, Suryamaninagar-799022, Tripura, India

2. Department of Chemistry, Dasaratha Deb Memorial College, Khowai, Tripura, India

3. School of Chemistry, Sambalpur University, Jyoti Vihar-768019, Odisha, India

Abstract

Multilayer films can be precisely engineered on solid substrate via layer-by-layer (LbL) self-assemble technique using negatively charged organic dye and positively charged polyelectrolytes or surfactants. This communication first time reports the successful incorporation of an anionic dye Niagara blue (NB) in Polyallylamine hydrochloride (PAH) by electrostatic sequential alternative LbL adsorption. The photo-physical characteristics of LbL films are investigated by varying different parameters such as number of deposited layer, dipping time in dye solution, pH of PAH solution, concentration of the dye, etc. In addition, the interaction of NB with double tail surfactant Didodecyl dimethyl ammonium bromide (DDAB) at different concentrations is also studied in the light of UV–Vis absorption spectroscopy. Spectroscopic analysis reveals that NB has been successfully anchored to PAH or DDAB through electrostatic self-assembled technique and forms molecular aggregates. The formation of aggregates is further confirmed by atomic force microscopic (AFM) study.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

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