Self-templated synthesis of amide catenanes and formation of a catenane coordination polymer
作者:James E. M. Lewis
DOI:10.1039/c9ob00107g
日期:——
isophthalamide [2]catenanes of various sizes in up to 51% yield without the need for metal ions as templates or mediators of covalent bond formation. Using this strategy a bis-monodentate catenane was prepared incorporating exohedral pyridine units. Upon complexation of this ligand with AgOTf a one-dimensional coordination polymer was obtained in the solid state in which both macrocycles of the catenane are involved
Pyridine N-oxide derivatives are capable of formation of stable [2]pseudorotaxanes with diamide-based macrocycles in solution and in the solid state, and their dethreading/rethreading movements can be easily controlled by acid–base stimuli.
A ditopic macrocycle with a bisamide and a half dibenzo-crown ether component has been newly synthesized and its complexation behavior toward neutral phenanthroline derivatives is reported. The macrocycle can bind phenanthroline derivatives very strongly by hydrogen bonding and π-electron interaction, yielding pseudorotaxane structures. The inclusion complexes show a pH controllable reversible threading–dethreading molecular switching system.