Solvent-Free Mechanochemical Synthesis of Strongly Luminescent Eu(III) Hybrid Materials Using Tetramethylammonium Salts

Abstract

A solvent-free mechanochemical treatment is used to synthesize an Eu(III) hybrid material containing Eu(D-facam)₃ and tetramethylammonium acetate (TMAOAc), ^mechEu(D-facam)₃-TMAOAc. The synthesis method is efficient and the reaction occurs within 10 s. Mechanochemically prepared ^mechEu(D-facam)₃-TMAOAc is proven to be a bimetallic compound, in which TMAOAc functions as a bridging molecule between multiple Eu(III) complexes. Compared with Eu(D-facam)₃, ^mechEu(D-facam)₃-TMAOAc exhibits ultra-high luminescence, excellent circular polarization activity and thermal stability.

Mechanochemical synthesis, Lanthanide complex, Luminescence