Urea-Based Porous Organic Frameworks: Effective Supports for Catalysis in Neat Water
作者:Liuyi Li、Zhilin Chen、Hong Zhong、Ruihu Wang
DOI:10.1002/chem.201304046
日期:2014.3.10
Two urea‐based porous organic frameworks, UOF‐1 and UOF‐2, were synthesized through a urea‐forming condensation of 1,3,5‐benzenetriisocyanate with 1,4‐diaminobenzene and benzidine, respectively. UOF‐1 and UOF‐2 possess good hydrophilic properties and high scavenging ability for palladium. Their palladium polymers, PdII/UOF‐1 and PdII/UOF‐2, exhibit high catalytic activity and selectivity for Suzuki–Miyaura
分别通过1,3,5-苯三异氰酸酯与1,4-二氨基苯和联苯胺的脲形成缩合反应合成了两种基于尿素的多孔有机骨架UOF-1和UOF-2。UOF-1和UOF-2具有良好的亲水性和对钯的高清除能力。他们的钯聚合物Pd II / UOF-1和Pd II/ UOF-2对铃木-宫浦交叉偶联反应和水中硝基芳烃的选择性还原具有很高的催化活性和选择性。催化反应可以在室温下有效地进行。催化反应后形成了具有窄尺寸分布的钯纳米粒子,并很好地分散在UOF-1和UOF-2中。XPS分析证实了尿素氧原子与钯的配位。SEM和TEM图像显示,在钯加载和催化反应后,UOF-1和UOF-2的原始网络形态得以保留。