Fabrication of Large-area Multi-stimulus Responsive Thin Films via Interfacially Confined Irreversible Katritzky Reaction

This study reports a breakthrough strategy for in situ synthesis of large-area, free-standing, robust and multi-stimulus responsive thin films through a catalyst-free and irreversible Katritzky reaction at a liquid-liquid interface. The as resulted films are featured with adjustable thickness of 1-3 μm and an area up to 50 cm². The thin films exhibit fast photo-mechanical motions (a response time of ca 0.1 s), vapor-mechanical motions, as well as photo-chromic and solvato-chromic behaviors. It was revealed that the reason behind the observable motions is proton transfer from the imine groups to the carbonyl structures within the film induced by photo- and/or dimethyl sulfoxide-stimulus. In addition, the films can harvest anionic radicals and the radicals as captured can be efficiently degraded under UV light illumination. This study provides a new strategy for fabricating smart thin films via interfacially confined irreversible Katritzky reaction.PMID:38622832 | DOI:10.1002/anie.202402453

Source: Angewandte Chemie - April 16, 2024 Category: Chemistry Authors: Yuanhong Shu Yan Luo Hexi Wei Lingya Peng Jingjing Liang Binbin Zhai Liping Ding Yu Fang Source Type: research