Allosteric anion binding controlled by infrared irradiation: Light-triggered chromogenic sensing of iodide in aqueous solution

Integration of a disulfide bond as the photoactivatable hinge into a homotropic receptor to bridge the two Ag(I)-based anion sites enables allosteric binding of iodide anions with a dynamic color response under infrared irradiation, offering a specific and straightforward detection of iodide in aqueous solution.