Abstract
AbstractTetranuclear zinc(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 “defective” double‐cubane cores [Zn4O6], which are bridged by two μ3‐methoxo and four μ2‐phenolato oxygen atoms in each discrete complex. In halide complexes 1, 2 and 3, two zinc(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 zinc(II) in pseudo halide complexes 4 and 5 show slightly distorted octahedral geometries. The complexes exhibit 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. Complex 5 has the highest Φem among the alkoxo‐bridged multinuclear zinc(II) clusters ever reported.
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