A New Metal-Organic Framework with Pentanuclear Zinc Clusters as Secondary Building Units

A new Zn(II)-cluster-based coordination polymer-namely, {[Zn-5(mu(3)-OH)(2)(bbi)(OBA)(4)]center dot 2H(2)O center dot 2MeCN}(n) (1) (bbi = 1,1'-(1,4-butanediyl)bis(imidazole), H(2)OBA = 4,4-oxybisbenzoic acid) was synthesized under solvothermal conditions using MeCN/H2O (7:4) as solvents and characterized by single crystal X-ray diffraction, elemental analysis, powder X-ray diffraction, thermogravimetric analysis, and luminescent measurements. Single-crystal structure analyses reveal that the complex 1 is a 3D interlocking framework based on the pentanuclearmetal clusters of [Zn-5(mu(3)-OH)(2)(COO)(6)] as secondary building units, which possesses {3(3)center dot 4(6)center dot 5(5)center dot 6}network topology considering the pentanuclear cluster as 6-connected nodes. Additionally, the long emission lifetime of complex 1 displays that it is promising photoluminescent material.