摘要
A d-f heteronuclear metal-organic framework(MOF),{[Tm3Zn6(bipy2)2(mimda)7(H2O)3]·(H2O)5}n(1,H3 mimda = 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) ?,β = 97.344(11)°,V = 9120.7(9) ?-3,Z = 4,F(000) = 5184,the final R = 0.0530 and w R = 0.1306.In complex 1,the Tm(Ⅲ) ions adopt two types of coordination fashions.Complex 1 shows onedimensional(1-D) Tm-Zn heteronuclear zigzag chains,and these chains are further linked by H3 mimda 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,H3 mimda 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.
A d-f heteronuclear metal-organic framework(MOF),{[Tm3Zn6(bipy2)2(mimda)7(H2O)3]·(H2O)5}n(1,H3 mimda = 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) ?,β = 97.344(11)°,V = 9120.7(9) ?-3,Z = 4,F(000) = 5184,the final R = 0.0530 and w R = 0.1306.In complex 1,the Tm(Ⅲ) ions adopt two types of coordination fashions.Complex 1 shows onedimensional(1-D) Tm-Zn heteronuclear zigzag chains,and these chains are further linked by H3 mimda 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,H3 mimda 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.
基金
Supported by the Foundation for Science&Technology Innovation Talents in Henan Province(Nos.14HASTIT014,and 16410010012)
Natural Science Foundation of China(Nos.21671114)
the Foundation of Education Committee of Henan province,China(No.14B150033)