Search results
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). The two components of a rotaxane are kinetically trapped since the ends of the dumbbell (often called stoppers) are larger ...
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 ...
People also ask
What are rotaxanes?
What is the rotaxane cover feature?
Is rotaxane a triply operable molecular switch?
Is rotaxane a macrocycle?
Oct 20, 2017 · In 2006, Kameta and Hiratani reported upon the chiral sensing of phenylalaninol by a mechanically planar chiral rotaxane (Figure 18). 45 The racemate of rotaxane 30 was prepared by a covalent bond formation (rather than template synthesis) approach. 46 1 H NMR and fluorescence spectroscopic experiments provided evidence that l-phenylalaninol ...
- Nicholas Henley Evans
- 2018
Aug 22, 2020 · Similarly to the capping method, snapping involves the pre-assembly of semi[2]rotaxane and covalent bonding with a stopper (Fig. 1 (ii)). As the macrocycle component is pre-synthesized in both methods, capping and snapping are especially suitable for the synthesis of [2]rotaxanes based on cyclodextrins, cucurbit[n]urils, and other macrocycles whose syntheses and modifications are not ...
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 ...
Apr 7, 2022 · Rotaxanes are an emerging class of molecules composed of two building blocks: macrocycles and threads. Rotaxanes, and their pseudorotaxane and polyrotaxane relatives, serve as prototypes for molecular-level switches and machines and as components in materials like elastic polymers and 3D printing inks. The rigidity and flexibility of these molecules is a characteristic feature of their design ...
Jan 12, 2021 · A characteristic of rotaxane is that the cyclic molecule and the linear molecule are not covalently bound. Hence, the cyclic molecule can rotate and slide along the linear molecule (Fig. 2 ).
