Selective construction of molecular Solomon links and figure-eight knots by fine-tuning unsymmetrical ligands  

作　　者：Qiu-Shui Mu Xiang Gao Zheng Cui Yue-Jian Lin Guo-Xin Jin 

机构地区：[1]State Key Laboratory of Molecular Engineering of Polymers,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China [2]State Key Laboratory of Organometallic Chemistry,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China

出　　处：《Science China Chemistry》2023年第10期2885-2891,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22031003, 21720102004);Shanghai Science Technology Committee (19DZ2270100)。

摘　　要：Using the strategy of ligand fine-tuning by steric hindrance, we successfully obtained Solomon links(4_(1)^(2)) and figure-eight knots(4_(1)) with half-sandwich organometallic unit and amino-acid embedded ligands. The two curved bidentate ligands exhibit subtle differences, whereas they result in totally distinct entanglement modes. An alcoholysis reaction with the ligands leads to the formation of a molecular tweezer. Notably, unsymmetrical ligands were utilized in the self-assembly process to explore the formation of directional molecules, and the reactions exhibited selectivity due to comprehensive π interactions and multiple hydrogen bonds. The topologies and behavior of the above structures were confirmed through single-crystal X-ray diffraction,nuclear magnetic resonance techniques and mass spectrometry.

关 键 词：interlocked molecule figure-eight knot solomon link supramolecular self-assembly 

分 类 号：O641.4[理学—物理化学]