Strong fluorescent emission of a new fourfold-interpenetrated diamondoid metal-organic framework of zinc(II) urocanate with one-dimensional open channels

A novel 3D metal-organic framework of zinc(II) urocanate, {[Zn(L1)2](H2O)4.25}n, was hydrothermally synthesized and characterized by single-crystal X-ray diffraction. This compound crystallizes in the tetragonal system with the space group I4(1)/a and cell parameters a = b = 18.3113(9), c = 22.398(2), V = 7510.2(9) Å3 and Z = 16. The crystal structure presents a novel fourfold-interpenetrated diamondoid network with 1D open channels in which the water molecules are trapped. This compound exhibits a strong blue-fluorescent emission in the solid state.