Coordinated halide and pseudo halide‐dependent structures and photoluminescence of defective double cubane Zn(II) clusters
Résumé
Tetranuclear Zn(II) complexes, [Zn4(L)4(µ3-OCH3)2(X)2] (L = 2-((benzyloxy)carbonyl)-6-methoxyphenolate; X = Cl ⎻ (1), Br ⎻ (2), I ⎻ (3), N3 ⎻ (4), or NCS ⎻ (5)), have provided "defective" double-cubane core [Zn4O6], which were bridged by two µ3-methoxo and four µ2-phenolato oxygens in each discrete complex. In halide complexes 1, 2 and 3, two Zn(II) ions are in slightly distorted octahedral coordinations and the other two in geometries close to the severely distorted trigonal bipyramid, respectively, while all four Zn(II) in pseudo halide complexes 4 and 5 show slightly distorted octahedral geometries. Each complex exhibited blue fluorescence (λmax = 415-428 nm) with high photoluminescence quantum yields (PLQYS, Φem) in the range of 0.22-0.53 at room temperature in the solid state, of which 5 showed the highest Φem among the alkoxo-bridged multinuclear Zn(II) clusters ever reported.
Origine | Fichiers produits par l'(les) auteur(s) |
---|