This work studies the synthesis of copolymers having photochromic azobenzene groups in the main chain, obtained by copolymerization between phosgene and suitable mixtures of azo-monomer and bisphenol-A. Moreover, we show the application of our novel copolymer as a potential logic gate. The chemical and physical properties of these statistical copolymers were investigated by means of MALDI-TOF mass spectrometry, gel permeation chromatography, thermo-analytic techniques and UV-vis and fluorescence spectroscopy. The structural analysis confirmed the formation of statistical copolymers. Furthermore, some of these copolymers exhibited a trans → cis reversible photoisomerization not only in solution but also in the solid state on exposure to light of 330 or 440 nm (using a spectrofluorometer as a fully tunable light source). Finally, a discrete and unusual fluorescence was observed upon irradiation at 330 and 440 nm. An in silico TD-DFT calculation study was conducted to explain the observed fluorescence. Thanks to their spectroscopic features, these copolymers are suitable for use in photonic applications such as an optical logical gate.
|Titolo:||Synthesis and characterization of copolycarbonates having azobenzene units in the main chain as an active group for optical logic gate devices|
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||1.1 Articolo in rivista|