Temperature-Responsive Switch Constructed from an Anthracene-Functionalized Pillar[5]arene-Based Host–Guest System

A monofunctionalized anthracene pillar[5]­arene (MAP5) was designed and synthesized by a click reaction. MAP5 was bound to an ionic liquid through host–guest interactions to modify a gold interface. The bonding and release of MAP5 was readily and reversibly controlled by temperature regulation. The developed temperature-responsive switch at an interface can be used in memory storage, drug delivery, and sensing.