Mr. Yulin Deng
Distinct dynamics and stimuli-responsiveness of two heterorotaxanes incorporating mechanically interlocked cucurbituril (CB) and cyclodextrin (β-CD or γ-CD) were investigated.1 Although the two rotaxanes are structurally differentiated by a subtle variation, which is a sugar unit only, the relative interaction strength between different interlocked components (the CD, CB, biphenyl station, ammonium unit, tetra(ethylene glycol) linker) are amplified. Thus, very distinctive shuttling performances of the CDs along the axle of two rotaxanes were revealed by NMR studies, and the co-conformational changes can be manipulated by their responsiveness towards temperature, solvent polarity, pH, and external guests.
- Deng, Y.; Ren, X.; Tang, M. P.; Lai, S. K.-M.; Ng, A. W. H.; Li, C.-N.; Au-Yeung, H. Y. Mater. Today Chem., 2022, 24, 100952.