文献类型：期刊文献

英文题名：On-surface synthesis of planar dendrimers via divergent cross-coupling reaction

作者：Li, Deng-Yuan[1,2];Li, Shi-Wen[1,2];Xie, Yu-Li[1,2];Hua, Xin[1,2];Long, Yi-Tao[1,2];Wang, An[1,2];Liu, Pei-Nian[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：10

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000469909500016)】；

基金：The authors thank Prof. Xiao-Hui Qiu in National Center for Nanoscience and Technology for his insightful suggestions to this work. This work was supported by the National Natural Science Foundation of China (Project Nos. 21421004, 21561162003, 21672059, and 91845110), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03), the Programme of Introducing Talents of Discipline to Universities (B16017), Program of the Shanghai Committee of Sci. & Tech. (Project No. 18520760700), and the Program for Eastern Scholar Distinguished Professor. The calculations were performed on TianHe-1 (A) at National Supercomputer Center in Tianjin.

语种：英文

摘要：Dendrimers are homostructural and highly branched macromolecules with unique dendritic effects and extensive use in multidisciplinary fields. Although thousands of dendrimers have been synthesized in solution, the on-surface synthetic protocol for planar dendrimers has never been explored, limiting the elucidation of the mechanism of dendritic effects at the single-molecule level. Herein, we describe an on-surface synthetic approach to planar dendrimers, in which exogenous palladium is used as a catalyst to address the divergent cross-coupling of aryl bromides with isocyanides. This reaction enables one aryl bromide to react with two isocyanides in sequential steps to generate the divergently grown product composed of a core and two branches with high selectivity and reactivity. Then, a dendron with four branches and dendrimers with eight or twelve branches in the outermost shell are synthesized on Au(111). This work opens the door for the on-surface synthesis of various planar dendrimers and relevant macromolecular systems.