Two new octa-coordinated ternary europium(III) complexes of the type [Eu(btfa)3(Br2-bpy)] (Eu-1) and [Eu(btfa)3(PhE2-bpy)] (Eu-2) (where btfa = 4,4,4-trifluoro-1-phenyl-1,3-butanedione, Br2-bpy 5,5?-dibromo-2,2?-bipyridine, PhE2-bpy 5,5?-bis(phenylethynyl)-2,2?-bipyridine) together with a previously reported complex [Eu(btfa)3(bpy)] (Eu-3) have been synthesized. The characterized by analytical ...

In pursuit of a new family mechanically responsive luminescent materials, it is aimed to differentiate triboluminescence (TL) from photoluminescence (PL). A β-diketonate ligand with tert-butyl groups (2,2,6,6-tetramethylheptane-3,5-dionate: tmh) selected quench EuIII-centered PL via ligand-to-metal charge transfer, whereas tmh provides efficient photosensitization TbIII ions. Bright TL observed...