Abstract
In [2]rotaxanes, hydrogen bonding interactions are found to be one of the prominent factors driving the templation of the macrocycle to the molecular axle. Several hydrogen bonding templating moieties like amides, hydrazones, nitrones, and squaraines have been incorporated into the molecular axle and the macrocycle for generating hydrogen bonding [2]rotaxanes. This review focuses on the design and synthetic strategy adopted in rendering various molecular axles, which can be used to generate [2]rotaxanes for numerous applications. Moreover, a detailed description is provided with suitable mechanistic insights about the utilization of hydrogen bonding [2]rotaxanes in applications like molecular motors, organic synthesis, and catalysis.
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