A π-conjugated covalent organic framework enables interlocked nickel/photoredox catalysis for light-harvesting cross-coupling reactions
作者:Ayan Jati、Suranjana Dam、Shekhar Kumar、Kundan Kumar、Biplab Maji
DOI:10.1039/d3sc02440g
日期:——
interlocked the catalysis mediated by light and the transition metal. Under light irradiation, enhanced energy and electron transfer in the COF backbone, as delineated by the photoluminescence, electrochemical, and control experiments, expedited the excitation of Ni centers to efficiently catalyze diverse photocatalytic C–X (X = B, C, N, O, P, S) cross-coupling reactions with efficiencies orders of
共价有机框架(COF)是异相光催化的杰出平台。在此,我们通过Knoevenagel缩合合成了基于芘的二维CC连接π-共轭COF ,并通过联吡啶部分锚定Ni( II )-中心。单金属修饰的Ni@Bpy-sp 2 c-COF取代了传统的双金属光氧化还原催化,将光和过渡金属介导的催化作用联锁起来。正如光致发光、电化学和控制实验所描述的那样,在光照射下,COF主链中的能量和电子转移增强,加速了Ni中心的激发,从而有效地催化多种光催化C-X(X = B、C、N、O) ,P,S)交叉偶联反应的效率比均相对照高几个数量级。COF 催化剂可耐受具有各种空间和电子特性的多种偶联伙伴,从而提供高达 99% 的产率的产品。一些反应以克级进行,并应用于多样化药物和复杂分子以证明合成效用。