Effect of Iodine Filler on Photoisomerization Kinetics of Photo-Switchable Thin Films Based on PEO-BDK-MR

Abstract

We report the effect of an iodine filler on photoisomerization kinetics of photo-switchable PEO-BDK-MR thin films. The kinetics of photoisomerization and time progression of PEO-BDK-MR/I2 nanocomposite thin films are investigated using UV-Vis, FTIR spectroscopies, and modified mathematical models developed using new analytical methods. Incorporating iodine filler into the PEO-BDK-MR polymeric matrix enhances the isomerization energy barrier and considerably increases the processing time. Our outcomes propose that enhanced photoisomerized and time processed (PEO-BDK-MR)/I2 thin films could be potential candidates for a variety of applications involving molecular solar thermal energy storage media.

Synthesis and Characterization of Thin Films Based on Azobenzene Derivative Anchored to CeO2 Nanoparticle for Photoswitching Applications

“…Figure 4a illustrates the main absorbance peak of the CeO 2 NPs‐MR thin film containing three subpeaks (three frequency bands) of absorption. Peaks 1 and 2 represent the methyl red's high‐ and low‐frequency bands, as shown in our previous works (5,37). However, peak 3 is believed to occur due to the bonds initiated between the carboxylic acid functional group of the methyl red and the surface of the CeO 2 NPs aggregates of the molecules in the thin films.…”