Structural diversity of luminescent lanthanide metal-organic frameworks based on a V-shaped ligand

作者：He, Yan-Fei^*; Chen, Di-Ming; Xu, Hang; Cheng, Peng

来源：CrystEngComm, 2015, 17(12): 2471-2478.

DOI：10.1039/c4ce02380c

• COORDINATION POLYMERS
• COMPLEXES
• PHOTOLUMINESCENCE
• TERBIUM(III)
• ROBUST
• IONS
• LN

Four types of luminescent lanthanide metal-organic frameworks (Ln-MOFs) with the formulas(Ln(2)(OBA)(3)(DMA)(2)(H2O)(2)](n) [1, Ln = Eu(1-Eu), Tb(1-Tb)], {[Ln(2)(OBA)(3)(H2O)(4)]center dot 2H(2)O}(n) [2, Ln = Eu(2-Eu), Tb(2-Tb)], {[Ln(OBA)(HOBA)(H2O)(2)]center dot 3DMF}(n) [3, Ln = Eu(3-Eu), Tb(3-Tb)], and(Ln(2)(OBA)(3)(DMF)(H2O)(2)](n) [4, Ln = Eu(4-Eu), Tb(4-Tb)] (H(2)OBA = 4,4'-oxybis.benzoate) acid, DMA = N,N-dimethylacetamide, DMF = N,N-dimethylformamide) have been solvothermally synthesized based on a V-shaped ligand H2OBA under different conditions. The structural features of the four types of Ln-MOFs are as follows: 1 shows a 3D framework in which the dinuclear SBUs are further cross-linked by OBA(2-) ligands. Both 2 and 3 exhibit a 2D network constructed by 1D chains. 4 features a 2D network, in which 1D chains and dinuclear SBUs arranged alternately through the OBA(2-) ligands. 4 can be transformed to 3 at room temperature in mother solution. The experimental results reveal that solvent and temperature play important roles in constructing coordination polymers. All the aforementioned Ln-MOFs are fully characterized by elemental analysis, infrared spectroscopy, and thermogravimetric analysis. The luminescence properties of these Ln-MOFs have been studied, showing emission characteristic for inorganic species at room temperature.

• 出版日期2015
• 单位南开大学