Monofunctionalized pillar[5]arene-based stable [1]pseudorotaxane

We reported a new monofunctionalized pillar[5]arene bearing imidazolium moiety that formed stable [1]pseudorotaxane even at high concentration (100 mmol/L) in chloroform. The self-assembly was detailed investigated by multiple methods, including varying concentration 1H NMR, 2D COSY NMR, 2D NOESY NMR, viscosity measurements, 2D DOSY NMR, and HR-ESI-MS analysis. [1]Rotaxane was obtained efficiently through photo thiol-ene reaction which further confirmed the formation of [1]pseudorotaxane.

Graphical abstractA new monofunctionalized pillar[5]arene bearing imidazolium moiety that formed stable [1]pseudorotaxane even at high concentration (100 mmol/L) was reported. [1]Rotaxane was obtained efficiently through thiol-ene reaction from [1]pseudorotaxane which further confirmed the formation of [1]pseudorotaxane.Figure optionsDownload full-size imageDownload as PowerPoint slide