Smart emissive hybrid dynamer and nanocomposite made of complementary organic and inorganic emitters combined via a supramolecular Janus synthon

Abstract

Monotopic and ditopic blue-emitting anthracene derivatives bearing one or two thymine moieties, respectively, are associated via hydrogen bonds to a red-emitting [Mo₆I₈(OCOC₂F₅)₆]²⁻ anion, whose charge is counter-balanced by a Janus-type organic synthon made of an imidazolium head bearing an organic chain terminated with a complementary diamidopyridine group. The generated supramolecular hydrogen-bonded complex and dynamers show blue emission in solution and red emission in the solid state. Once embedded in the PMMA film, the dynamer emission colour is controlled by the irradiation time and power in the UV-2A region. This dynamic luminescent behaviour allows for evanescent optical writing on the film.