Used in supramolecular chemistry as a host molecule for molecular recognition due to its preorganized cavity that selectively binds ions and small molecules. Commonly employed in the development of chemical sensors, especially for alkali and alkaline earth metals. Applied in separation processes to extract specific metal ions from mixtures. Utilized in designing ion-selective electrodes and membranes for analytical and environmental applications. Also serves as a building block in nanotechnology and catalysis for creating functional materials with tailored porosity and reactivity.