表面改性
聚氨酯
光催化
硅烷化
催化作用
材料科学
共价键
X射线光电子能谱
化学工程
可见光谱
胺气处理
嫁接
光化学
高分子化学
化学
有机化学
复合材料
聚合物
工程类
光电子学
作者
Han Peng,Thierry Romero,Vasiliki Papaefthimiou,Philippe Bertani,Vincent Ritleng
标识
DOI:10.1016/j.mcat.2023.113183
摘要
An easy-to-handle, highly reusable and efficient [Ru(bpy)3]2+-based heterogeneous photocatalyst was obtained by post-functionalization of a polydopamine-coated open cell polyurethane foam (PDA@PUF) via a silanization process of the mussel-inspired adhesive layer with 3-(triethoxysilyl)propan-1-amine (APTES), followed by an EDC-mediated coupling with [2,2′-bipyridine]-4-carboxylic acid and further complexation with [Ru(bpy)2Cl2] (bpy = 2,2′-bypyridine). The successful covalent grafting of APTES on the PDA layer of PUF and functionalization all over the foam surface with [Ru(bpy)3]2+ was suggested by 29Si CP-MAS NMR, XPS, ICP-AES and SEM-EDX. The macroscopic photocatalyst proved effective in model benzylic amine homocouplings and cross dehydrogenative couplings under visible-light irradiation and molecular oxygen, showing good functional group tolerance and excellent reusability in an easy-to-carry "dip-and-play" mode for at least six runs. Impressively, an improvement of the catalytic performances was even observed in both reactions, which most likely results from a modification of the uppermost layer of polydopamine throughout the successive cycles that renders the photocatalyst more accessible.
科研通智能强力驱动
Strongly Powered by AbleSci AI