Physicochemical Characteristic of Polydiacetylene Prepared in Vesicles, Rod-like and Thin Film upon Gamma Rays

Abstract

The purpose of this research was to look into the physicochemical properties of polydiacetylene (PDA) supramolecular assemblies made from 10,12-pentacosadiynoic acid after gamma irradiation. PDA can be oriented into any supramolecular form, including vesicle, rod-like and thin film structures. PDA dispersion was exposed to gamma radiation ranging from 0.5 - 5kGy. Pentacosa-10,12-diynoic acid is a diacetylene conjugate material with radiochromic properties. Its structure contains a pi-conjugated electron that efficiently reacts against radiation, transforming its optical properties in the visible region. The prepared PDA was characterised using UV-vis, FESEM, AFM, ¹H NMR and FTIR. The colour intensity of the PDA before and after gamma irradiation was measured and observed. The spectra were detected by UV-vis analysis at 649 nm. FESEM analysis revealed the morphology of vesicles as irregular shape particles and rod-like formations, whereas AFM analysis revealed the surface roughness of the formed PDA film. FTIR and ¹H NMR analysis confirmed the chemical structure of the PDA prepared in this study. As a result, the characteristics of each PDA supramolecule conformation and their response to gamma radiation were compared.