期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 44, 页码 18946-18954出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c09162
关键词
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资金
- National Science Foundation of China [21531002, 21720102004, 22031003]
- Shanghai Science Technology Committee [19DZ2270100]
Molecular figure-eight knot (notation: 4(1)) is extremely rare and presents great synthetic challenge due to its essentially complicated entanglement. To solve this synthetic problem, a quadruple stacking strategy was developed. Herein, we report the efficient self-assembly of figure-eight knots induced by quadruple stacking interactions, through the combination of four carefully selected naphthalenediimide (NM)-based pyridyl ligands and Cp*Rh building blocks bearing large conjugated planes in a single-step strategy. Notably, slight size adjustment of the Cp*Rh units was found to affect the stability of the figure-eight knots in methanol. Additionally, reversible structural transformations between these figure-eight knots and corresponding metal-lorectangles could be achieved by concentration changes and solvent- and guest-induced effects. X-ray crystallographic data and NMR spectroscopy provide full confirmation of these phenomena.
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