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Chapter

Cover Supramolecular Chemistry

Mechanically interlocked molecules  

This chapter explores mechanically interlocked molecules (MIMs), which belong to a category of structures containing two or more molecular sub-components that, despite not being chemically bonded, are inextricably connected due to the inability of bonds to pass through one another. This type of molecular entanglement is described as a mechanical bond. The chapter begins by outlining the formidable challenges presented in the syntheses of MIMs and the key strategies that have been developed to overcome them. It then considers cases in which the influence of the mechanical bond on chemical and physical properties, including supramolecular properties, delivers applications in sensing, catalysis, and materials. The control of molecular motion is one of the most prominent attributes of the mechanical bond. The chapter discusses how this facet serves as the foundation of modern-day molecular machinery and how dynamic MIMs are critical to future applications in nanotechnology.