Selective synthesis and structural transformation between a molecular ring-in-ring architecture and an abnormal trefoil knot.

Chemical Science
Li-Long DangGuo-Xin Jin

Abstract

The synthesis of complicated supramolecular architectures and the study of their reversible structural transformations remains a fascinating challenge in the field of supramolecular chemistry. Herein, two types of novel coordination compounds, a non-intertwined ring-in-ring assembly and an abnormal trefoil knot were constructed from a strategically selected Cp*Rh building block and a semi-rigid N,N'-bis(4-pyridylmethyl)diphthalic diimide ligand via coordination-driven self-assembly. Remarkably, the reversible transformation between the abnormal trefoil knot and the ring-in-ring assembly or the corresponding tetranuclear macrocycle could be achieved by the synergistic effects of Ag+ ion coordination and alteration of the solvent. Single-crystal X-ray crystallographic data and NMR spectroscopic experiments support the structural assignments.

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Citations

Oct 3, 2020·Journal of the American Chemical Society·Li-Long DangGuo-Xin Jin

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Methods Mentioned

BETA
NMR
X-ray

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