期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 50, 页码 22489-22493出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010995
关键词
catenane; chirality; coordination cage; mechanical bond; supramolecular chemistry
资金
- Deutsche Forschungsgemeinschaft [SPP 1807, CL489/3-2, CL 489/2-2]
- European Research Council [683083]
- Projekt DEAL
- European Research Council (ERC) [683083] Funding Source: European Research Council (ERC)
Most metallo-supramolecular assemblies of low nuclearity adopt simple topologies, with bridging ligands spanning neighboring metal centers in a direct fashion. Here we contribute a new structural motif to the family of host compounds with low metal count (two) that consists of a pair of doubly-interlocked, Figure-eight-shaped subunits, also termed lemniscates. Each metal is chelated by two chiral bidentate ligands, composed of a peptidic macrocycle that resembles a natural product with two pyridyl-terminated arms. DFT calculation results suggest that dimerization of the mononuclear halves is driven by a combination of 1) Coulomb interaction with a central anion, 2) pi-stacking between intertwined ligand arms and 3) dispersive interactions between the structure's compact inner core bedded into an outer shell composed of the cavitand-type macrocycles. The resulting cage-like architecture was characterized by NMR, MS and X-ray structure analyses. This new mechanically bonded system highlights the scope of structural variety accessible in metal-mediated self-assemblies composed of only a few constituents.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据