Two 3D Isostructural Ln(III)-MOFs: Displaying the Slow Magnetic Relaxation and Luminescence Properties in Detection of Nitrobenzene and Cr2O72-
Two 3D Isostructural Ln(III)-MOFs: Displaying the Slow Magnetic Relaxation and Luminescence Properties in Detection of Nitrobenzene and Cr2O72-
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两种 3D 同构 Ln(III)-MOF：在硝基苯和 Cr2O72- 检测中显示慢磁弛豫和发光特性
DOI：
10.1021/acs.inorgchem.6b01899
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发表时间：
2016-11-07
影响因子：
4.6
通讯作者：
Wang, Yao-Yu
中科院分区：
文献类型：
--
作者：
Gao, Rui-Cheng;Guo, Fu-Sheng;Wang, Yao-Yu
合成并表征了两种新的三维等结构镧系金属有机骨架（Ln（III）-MOFs），[LnL（H2O）（3）]中心点3 H（2）O中心点0.75DMF（1-Ln; Ln = Dy（III）和Eu（III）离子，H3 L =联苯-3 '-硝基-3，4'，5-三羧酸，DMF = N，N '-二甲基甲酰胺）。在1200 Oe直流电场下，配合物1-Dy表现出缓慢的磁弛豫行为，其能垒Δ U_（eff）为57 K，指前因子τ（0）为3.89 × 10 ~（-8）s。荧光光谱研究表明，1-Eu对硝基苯和Cr2 O 72-具有较高的猝灭效率和较低的检测限。同时，猝灭后的1-Eu样品经DMF或水洗涤后荧光强度恢复，表明1-Eu可作为一种高选择性、可循环利用的荧光传感材料用于硝基苯和Cr2 O 72-阴离子的传感。
Two new three-dimensional isostructural lanthanide metal organic frameworks (Ln(III)-MOFs), [LnL(H2O)(3)]center dot 3H(2)O center dot 0.75DMF (1-Ln; Ln = Dy(III) and Eu(III) ions, H3L = biphenyl-3'-nitro-3,4',5-tricarboxylic acid, DMF = N,N'-dimethylformamide), were synthesized and characterized. The appearance of temperature-dependent out-of-phase (chi ''(M)) signal reveals that complex 1-Dy displays slow magnetic relaxation behavior with the energy barrier (Delta U-eff) of 57 K and a pre-exponential factor (tau(0)) of 3.89 X 10(-8) s at 1200 Oe direct current field. The luminescence explorations demonstrated that 1-Eu exhibits high quenching efficiency and low detection limit for sensing nitrobenzene and Cr2O72-. Meanwhile, the fluorescence intensity of the quenched 1-Eu samples will be resumed after washing with DMF or water, indicating that 1-Eu may be used as a highly selective and recyclable luminescence sensing material for sensing nitrobenzene and Cr2O72- anion.