“Dial‐In” Emission from a Unique Flexible Material with Polarization Tuneable Spectral Intensity

Abstract

The growth of an organic photoluminiscent material which could show promising role as catalyst, sensors, organic light emitting diode, logic gate, etc is a major demand and challenge for the global scientific society. In context to this, we adopted a photoclick polymerization method for the growth of unique photoluminescent three dimensional (3D) polymer film E as model system that showed emission tunability over range 350‐650 nm against excitation range 295‐425 nm. The DFT analysis on energy calculation and pi stacking supported well to the spectroscopic observation for the material to exhibit broad range of emission due to newly formed chromophoric units within the film. Full polarization spectroscopic Mueller Matrix studies employed to extract and quantify the molecular orientational order of both the ground (excitation) and excited (emission) state anisotropies via a set of newly defined parameters, namely the fluorescence diattenuation and fluorescence polarizance. The information contained in the recorded fluorescence Mueller matrix of the organic polymer material enabled a useful way to control the spectral intensity of emission using pre and post‐selection of polarization states. The observation was on the assumption for the longer lifetime of the excited dipolar orientation attributed to compactness of the film.