N-Salicylidene anil anions as thermo-sensitive components of organic-inorganic hybrid materials

► New N-salicylidene meta and para aminobenzenesulfonate anions. ► Reversible thermochromic properties and high thermal stability. ► Insertion of functional organic components into inorganic frameworks. ► Crystal structures of the hybrids materials. ► Thermally induced keto-enol equilibrium tracked by fluorimetry.