Self-assembled M<sub>12</sub>L<sub>24</sub> nanospheres as a reaction vessel to facilitate a dinuclear Cu(<scp>i</scp>) catalyzed cyclization reaction
作者:Sergio Gonell、Xavier Caumes、Nicole Orth、Ivana Ivanović-Burmazović、Joost. N. H. Reek
DOI:10.1039/c8sc03767a
日期:——
The application of large M12L24 nanospheres allows the pre-concentration of catalysts to reach high local concentrations, facilitating reactions that proceed through dinuclear mechanisms. The mechanism of the copper(I)-catalyzed cyclization of 4-pentynoic acid has been elucidated by means of a detailed mechanistic study. The kinetics of the reaction show a higher order in copper, indicating the formation
大M 12 L 24纳米球的应用使催化剂的预浓缩达到高局部浓度,促进通过双核机制进行的反应。通过详细的机理研究,阐明了铜( I )催化4-戊炔酸环化的机理。反应动力学显示铜具有更高的有序性,表明双铜中间体的形成是反应的关键速率决定步骤。在催化过程中通过反应混合物的 CIS-HRMS 分析进一步鉴定了该中间体。基于机理研究结果,应用了M 12 L 24纳米球,它可以通过氢键结合多达 12 个铜催化剂。纳米球中铜催化剂的这种预组织导致铜的局部浓度较高,从而导致更高的反应速率和周转数,因为双核途径受到青睐。