A Switchable Red Emitting Fluorophore Involving a 7.6.6 Defect

Abstract

An acridine unit entangled into a macrocyclic derivative forms a very efficient fluorophore decorated with the confinements of 7.6.6 defect. The designed and unoccupied interal cavity observed for significantly rigidified environment changes the optical properties acting as a switch between two, on and off states. The observed behaviour unequivocally confirms a dominating influence of the hydrogen-like interaction for quenching the emission properties within organic chromophores.