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A rotaxane (from Latin rota 'wheel', and axis 'axle') is a mechanically interlocked molecular architecture consisting of a dumbbell-shaped molecule which is threaded through a macrocycle (see graphical representation).
Aug 22, 2020 · In this chapter, we are focusing on the three major transition steps of the evolution of rotaxanes from their components into functional hybrid materials (Scheme 1): (i) synthetic methodology of rotaxanes, including the typical [2]rotaxane, and the newly emerged [1]rotaxane, [c2]daisy chain and hetero[n]rotaxane structures; (ii) following the ...
Jun 10, 2019 · The Cover Feature shows a cartoon representation of helic[6]arene-based [2]rotaxane which performs as a triply operable molecular switch. The states of helic[6]arene on different sites (protonated tertiary ammonium salt and hexamethylene chain) are reversibly switched by the addition and removal of fluoride ions (TBAF/NaBArF), protonation and deprotonation of tertiary amine (HBArF/DBU), and ...
Feb 6, 2020 · Rotaxane 6 was obtained in 54% yield from the corresponding acid chloride and in 40% yield when using the 1-hydroxybenzotriazole ester as the electrophile. C=O/C=S/SO 2 /P=O electrophile scope.
- Chong Tian, Stephen D. P. Fielden, George F. S. Whitehead, Iñigo J. Vitorica-Yrezabal, David A. Leig...
- 2020
Mar 15, 2023 · Through molecular mechanics using the force field along with the quantum dynamical aspect of mechanically interlocked compounds, rotaxanes (defined as macromolecular rings that are threaded on a dumbbell-shaped axle molecule) are investigated with advanced quantum mechanical methods, including the atom-centered density matrix propagation simulation technique, at different temperatures like 300 ...
Many of the synthesized rotaxanes were used for different applications. 119 For example, Tian et al. synthesized a rotaxane containing an α-CD macrocycle and an azobenzene chain capped on both ends with different fluorescent naphthalimide derivatives. 120 The cis–trans isomerization of the azobenzene unit resulted in the shuttling of α-CD and the change in fluorescence intensity of the two ...
Aug 16, 2021 · Inspired by the myriad enzymes found in living organisms, supramolecular chemists have investigated the cavities of both macrocycles and the related interlocked molecules catenanes and rotaxanes as catalytic and non-catalytic sites of chemical reactions.
