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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).
Polyrotaxane is a type of mechanically interlocked molecule consisting of strings and rings, in which multiple rings are threaded onto a molecular axle and prevented from dethreading by two bulky end groups. As oligomeric or polymeric species of rotaxanes, polyrotaxanes are also capable of converting energy input to molecular movements because ...
Rotaxanes are mechanically interlocked molecules and contain one or more macrocycles threaded through a linear guest molecule. The macrocycles are trapped along the linear unit by the conjugation of stoppers that are larger than the macrocycle. A rotaxane resembles the shape of a dumbbell with a ring trapped in between the two ends (Fig. 13 ).
Mar 3, 2018 · This Minireview presents illustrative examples of chiral [2]catenanes and [2]rotaxanes, and discusses where these molecules have been used in chemical applications such as chiral host–guest recognition and asymmetric catalysis. Keywords: catalysis, catenanes, chirality, host–guest recognition, rotaxanes. Go to:
- Nicholas Henley Evans
- 10.1002/chem.201704149
- 2018
- Chemistry. 2018 Mar 2; 24(13): 3101-3112.
Jun 10, 2019 · This minireview details advances in rotaxanes containing porphyrin, organized according to where the porphyrin is situated in the rotaxane structure. Specific examples are highlighted where the properties imparted to the structure by the porphyrin are uniquely utilized by the rotaxane architecture.
Aug 16, 2021 · Schematic representation of (A) macrocycle, (B) catenane and (C) rotaxane. This chapter surveys examples of reactivity arising in the confined spaces of macrocycles, catenanes and rotaxanes.
Jan 1, 2021 · Rotaxanes are highly promising and attractive supramolecular catalysts. They offer conceptually novel possibilities in catalysis, such as switchability, the generation of highly congested reaction spaces or the development of bifunctional catalyst systems.