Sodium templated formation of a unique tetradecanuclear {Zn12(μ3-OH)6Na2(μ2-O)}18+ hetero-metal cluster core having an auxiliary bithiazole dibenzoate ligand

A three-dimensional (3D) metal-organic framework having a unique tetradecanuclear {Zn-12(mu(3)-OH)(6)Na-2(mu(2)-O)}(18+) hetero-metal cluster core, formulated as {Zn-12(BTDA)(9)(mu(3)-OH)(6)Na-2(mu(2)-O)} (1) [H(2)BTDA = 4,4'-(4,4'-dibutyl-2,2'-bithiazole-5,5'-diyl)dibenzoic acid], has been described herein. The tetradecanuclear hetero-metal cluster core is composed of two heptanuclear {Zn-6(mu(3)-OH)(3)Na}(10+) trifolium-shaped subunits where the axle sodium(I) ion is connected with three pairs of zinc(II) ions by three mu(3)-OH ions and the two sodium(l) ions are further linked by a mu(2)-oxo bridge. Besides, the auxiliary BTDA ligand serves as a multi-dentate bridging mode linking adjacent tetradecanuclear hetero-metal clusters into a 3D coordination polymer where a rhombohedral array with a new (4(18) . 8(108) . 12(27)) . (4)(9) topology is observed. (C) 2013 Elsevier B.V. All rights reserved.