文献类型：期刊文献

英文题名：Synthesis of single-layered fluorographdiyne nanosheets via selective on-surface 2D covalent polymerization

作者：Shu, Chen-Hui[1]; Zheng, Yi[5]; Lin, Tao[6]; Kang, Li-Xia[3]; Qu, Zhang[6]; Wang, Zhi-Yu[6]; Wang, Ying[3]; Huang, Zheng-Yang[3]; Liu, Qian[3]; Xu, Hang[1]; Chen, Chong[1]; Wu, Yangfan[4,5]; Xiao, Longteng[4,5]; Liu, Mengxi[4,5]; Qiu, Xiaohui[4,5]; Liu, Pei-Nian[2,3]; Li, Deng-Yuan[2]

机构：[1] School of Future Technology, Henan University, Kaifeng, 475004, China; [2] State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China; [3] School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, China; [4] Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing, 100049, China; [5] University of Chinese Academy of Sciences, Beijing, 100049, China; [6] College of New Materials, New Energies Shenzhen Technology University, Shenzhen, 518118, China

年份：2026

外文期刊名：arXiv

收录：EI(收录号：20260302888)

语种：英文

外文关键词：Cobalt - Covalent bonds - Gold - Gold compounds - Physicochemical properties

摘要：Two-dimensional conjugated polymers (2DCPs) are significant macromolecular materials with intriguing and tunable physicochemical properties that depend on their geometries. Graphdiyne and its derivatives are exemplary 2DCPs featuring sp-sp2 hybridized skeletons. However, achieving single-layered, large-domain/regular graphdiyne and its derivatives on surfaces remains a formidable challenge due to the lack of selective 2D covalent polymerization methods. Here, we report a selective on-surface 2D covalent polymerization method via the combination of cobalt catalysis and coronene templating, achieving the synthesis of single-layered fluorographdiyne nanosheets up to 60×60 nm2 on Au(111) surface. Using scanning probe techniques, we visualize the sequential polymerization process and characterize cobalt-activated coupling intermediates at the atomic level. Experimental and theoretical analyses suggest that strong d-π coupling between cobalt and alkynyl transforms a robust Csp-Au bond into a weaker Csp2-Au bond, thereby facilitating the demetallization C-C coupling. Besides, the templating effect of coronene suppresses kinetically trapped defects and improves the selectivity of hexagonal-ring formation in the complex 2D covalent polymerization process. ? 2026, CC BY.