A Three-dimensional Tm(III)-Zn(II) Heteronuclear Metal-organic Framework Based on Imidazole-dicarboxylate Ligand: Synthesis, Crystal Structure and Luminescence Property

Subjects: Chemistry >> Physical Chemistry submitted time 2017-11-05 Cooperative journals: 《结构化学》

GUO Nan FENG Xun JIA Hongc QIN Guo-Zhan WEI Jing-Tao HAN Zhi-Yue

Abstract： A d-f heteronuclear metal-organic framework (MOF), {[Tm3Zn6(bipy2)2(mimda)7 (H2O)3]·(H2O)5}n (1, H3mimda = 2-methyl-1-H-imidazole-4,5-dicarboxylic acid, and bipy = 4,4΄-bipyridine), has been synthesized under solvothermal conditions, and structurally characterized by elemental analysis, IR spectra and X-ray single-crystal diffraction. It crystallizes in orthorhombic system, space group Pnma with a = 16.1102(9), b = 33.5805(19), c = 16.8593(10) Å, β = 97.344(11)°, V = 9120.7(9) Å3, Z = 4, F(000) = 5184, the final R = 0.0530 and wR = 0.1306. In complex 1, the Tm(III) ions adopt two types of coordination fashions. Complex 1 shows one-dimensional (1-D) Tm-Zn heteronuclear zigzag chains, and these chains are further linked by H3mimda ligands into Tm-Zn heteronuclear 2-D lattice-like arrays. The 2-D heteronuclear units were connected through [Zn6(mimda)6] rings to give rise to the Tm-Zn heteronuclear cages. Finally, H3mimda ligands connected the cages into a 3-D heterometallic framework by the combination of [TmO7]n and Tm-Zn heteronuclear cages. In addition, the thermal stability and luminescent property have been investigated.

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