Photophysical behavior of layer-by-layer electrostatic self-assembled film of azo dye Chromotrope-2R and a polycation

摘要: Abstract This communication reports the fabrication of layer-by-layer electrostatic self-assembled films an azo dye Chromotrope-2R (CH2R) and a Polycation poly(allylamine hydrochloride) (PAH) onto solid substrate. UV–vis absorption steady state fluorescence emission spectroscopy successfully confirm incorporation molecules PAH coated quartz The adsorption behavior CH2R backbone in LbL highly depends upon variation microenvironment namely pH solution from which film was fabricated. layer substrate able to swell sufficiently at very high pH. Density functional theory also utilized here explain origin various spectral transitions ground electronic states for both neutral anionic form CH2R. In more closure association causes their aggregations are reflected spectra when compared those pure solution. Atomic force microscopic images assembled aqueous different clearly reveal change surface morphology degree deposited