Cycloalkanes are bridged aromatic compounds with a rigid structure consisting of two or more aromatic rings connected by bridging groups. They are used as supramolecular host materials because they are able to form stable complexes with guest molecules through π-π stacking and other interactions. The shape and size of the cycloalkanes' cavities can be tailored by adjusting the number of bridging groups and aromatic rings. Applications include catalysis, molecular recognition, and the design of functional supramolecular materials. In supramolecular chemistry, cycloalkanes are used to create novel host-guest systems and explore new phenomena of molecular recognition and self-assembly.