文献类型：期刊文献

英文题名：Template-Steered Transformation of Isocyanides to Cumulene-Containing Organometallic Polymers on Ag(110)

作者：Liu, Qian[1];Chen, Zhen-Qiang[1];Su, Xue-Lei[3];Liu, Jian-Wei[1];Qi, He[1];Wu, Xin-Yan[1];Wang, Ying[1];Yu, Ping[3];Li, Deng-Yuan[2];Liu, Pei-Nian[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]China Pharmaceut Univ, Sch Pharm, State Key Lab Nat Med, Nanjing 211198, Peoples R China;[3]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

年份：2026

卷号：17

期号：20

起止页码：5804

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：;EI(收录号：20262120757888);WOS:【SCI-EXPANDED(收录号:WOS:001759995200001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 22272050 and 92580139). We thank the Research Center of Analysis and Testing of East China University of Science and Technology for help in the characterization.

语种：英文

外文关键词：Chains - Dehalogenation - Organometallics - Polymerization

摘要：On-surface synthesis provides a powerful strategy for the atomically precise fabrication of low-dimensional nanoscale structures. However, controlling on-surface reaction pathways remains a challenge because of the irreversible and poorly selective nature of covalent coupling. Here, we report the direct transformation from isocyanides to cumulenes via the in situ formation of organometallic templates on Ag(110) and achieve the synthesis of two cumulene-containing organometallic polymers: chains (CC-OMCs) and networks (CC-OMNs). Using a bifunctional precursor 1,4-dibromo-2,5-diisocyanobenzene (DBDICB), the surface-assisted debromination performed the organometallic chain templates with heterotactic (hetero-OMCs) and homotactic (homo-OMCs) arrangement configurations between neighboring dehalogenated molecular units. The individual hetero-OMCs underwent intrachain polymerization to form the CC-OMCs. In contrast, increasing the coverage of DBDICB on Ag(110) drove the formation of 2D assembled structures of homo-OMCs by electrostatic interactions, thereby further promoting interchain polymerization to form CC-OMNs.