A switchable macrocycle–clip complex that functions as a NOR logic gate

We have synthesized a new molecular switch—based on a macrocycle–clip complex—whose switching behavior not only can be controlled through the use of either K+–[2,2,2]cryptand or NH4+–Et3N systems but also provides color changes that are visible to the naked eye; consequently, this system operates as a two-input NOR functioning molecular logic gate.