Interpenetrating and Self-Penetrating Zinc(II) Complexes with Rigid Tripodal Imidazole-Containing Ligand and Benzenedicarboxylate

Seven new Zn(II) metal organic frameworks [Zn(tib)(2)(H2O)](ClO4)(2) (1), [Zn-4(tib)(2)(PBDA)(3)(OH)(2)]center dot 4H(2)O (2), [Zn(tib)(HPBDA)]ClO4 (3), [Zn-2(tib)(PBDA)Cl-2]center dot 2H(2)O (4), [Zn-2(tib)(2)(PBDA)(3)Cl-2] (5), [Zn(2)tib)(2)(PBDA)](NO3)(2)center dot 2H(2)O (6), and [Zn-2(tib)(PBDA)I-2]center dot 2H(2)O (7) [tib = 1,3,5-tris(1-imidazoly)benzene, H(2)PBDA = p-benzenedicarboxylic acid] have been prepared and characterized by elemental. IR, thermogravimetric and X-ray diffraction analyses. Complexes 1 and 4 are two-dimensional (2D) networks with different topologies, which are further linked together to three-dimensional (3D) frameworks by hydrogen bonds. For 3, partial deprotonated HPBDA(-) is terminally coordinating to Zn(II) to form a 2D network. Complexes 2, 5, and 7 are 2-fold interpenetrated 3D frameworks, while 6 has a self-penetrating 3D structure. The influences of reaction temperature and counteranion on the structures of the complexes are discussed. The photoluminescence and nonlinear optical properties are investigated.