Multi‐Responsive Aryl (Indolyl) Methane as a Redox‐Controlled Fluorescent Switch

Abstract A series of symmetrical and unsymmetrical (indolyl)methanes were synthesized using the Ball milling methodology. The redox switching of the prepared compounds was studied by exploiting their multi‐responsive behavior towards oxidants (light/oxygen), reductants (NaBH 4 , hydrogen with Pd/C or palladium‐doped magnetic nanoparticles) and electrochemical modulation. Coumarin‐derived (indolyl)methane exhibited distinct color variation and emission On/Off during the redox switching which could be useful in materials/biomaterials applications. Overall, this paper describes the design, synthesis and demonstration of the multi‐responsive behavior of (indolyl)methanes towards redox switching.