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Anionic Lanthanide Metal–Organic Frameworks: Selective Separation of Cationic Dyes, Solvatochromic Behavior, and Luminescent Sensing of Co(II) Ion
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-08-30 00:00:00 , DOI: 10.1021/acs.inorgchem.8b01319 Zheng Cui 1 , Xiaoying Zhang 1 , Shuang Liu 1 , Lei Zhou 1 , Wenliang Li 1 , Jingping Zhang 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-08-30 00:00:00 , DOI: 10.1021/acs.inorgchem.8b01319 Zheng Cui 1 , Xiaoying Zhang 1 , Shuang Liu 1 , Lei Zhou 1 , Wenliang Li 1 , Jingping Zhang 1
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Four new microporous isostructural anionic lanthanide metal–organic frameworks (Ln-MOFs), [(CH3)2NH2]1.5[Ln1.5(TATAT)(H2O)4.5]·x(solvent) {Ln = Tb, Eu, Dy, and Gd; H6TATAT = 5,5′,5″-(1,3,5-triazine-2,4,6-triyl)tris(azanediyl)triisophthalate}, were successfully constructed. The Ln-MOFs are three-dimensional (3D) anionic frameworks and have two sizes of square channels (8.9 × 8.9 Å and 4.3 × 4.3 Å) with a Lewis basic nitrogen-decorated pore environment. The 3D frameworks of Ln-MOFs can be simplified as (4,6)-connected she networks. Because of the anionic framework properties, Ln-MOFs can efficiently select and separate cationic dyes in the presence of anionic or neutral dyes of similar sizes. The adsorption amounts of methylene blue for Tb-MOF, Eu-MOF, Dy-MOF, and Gd-MOF are 147, 141, 133, and 143 mg g–1, respectively. Moreover, Tb-MOF and Eu-MOF allow easy detection and identification of ethanol, acetonitrile, and diethyl ether through solvatochromism. Diethyl ether vapor also rapidly changes the colors of Tb-MOF and Eu-MOF. The photoluminescence experiments show that the absolute quantum yields of Tb-MOF (upon excitation at 341 nm), Eu-MOF (upon excitation at 396 nm), Dy-MOF (upon excitation at 341 nm), and Gd-MOF (upon excitation at 370 nm) are 32.5%, 11.0%, 2.1%, and 7.1%, respectively. In addition, Tb-MOF can detect Co2+ ion with high selectivity and quenching efficiency of 87%.
中文翻译：
阴离子镧系金属有机骨架：阳离子染料的选择性分离，溶剂变色行为和Co（II）离子的发光传感
四个新的微孔同构阴离子镧系金属有机骨架（Ln-MOFs），[（CH 3）2 NH 2 ] 1.5 [Ln 1.5（TATAT）（H 2 O）4.5 ]· x（溶剂）{Ln = Tb，Eu ，Dy和Gd；H 6 TATAT = 5,5'，5''-（1,3,5-triazine-2,4,6-triyl）tris（azanediyl）triisophthalate}。所述LN-MOFs材料是三维（3D）阴离子框架和具有与路易斯碱性氮装饰孔环境正方形通道的两种尺寸（8.9×8.9埃和4.3×4.3埃）。Ln-MOF的3D框架可以简化为（4,6）连接她网络。由于阴离子骨架性质，Ln-MOF可以在存在类似尺寸的阴离子或中性染料的情况下有效地选择和分离阳离子染料。Tb-MOF，Eu-MOF，Dy-MOF和Gd-MOF的亚甲基蓝吸附量分别为147、141、133和143 mg g –1。此外，Tb-MOF和Eu-MOF可以通过溶剂变色轻松检测和鉴定乙醇，乙腈和乙醚。乙醚蒸气还会迅速改变Tb-MOF和Eu-MOF的颜色。光致发光实验表明，Tb-MOF（在341 nm激发时），Eu-MOF（在396 nm激发时），Dy-MOF（在341 nm激发时）和Gd-MOF（在激发时）的绝对量子产率在370 nm处）分别为32.5％，11.0％，2.1％和7.1％。另外，Tb-MOF可以高选择性地检测Co 2+离子，猝灭效率为87％。
更新日期：2018-08-30
中文翻译：
阴离子镧系金属有机骨架：阳离子染料的选择性分离，溶剂变色行为和Co（II）离子的发光传感
四个新的微孔同构阴离子镧系金属有机骨架（Ln-MOFs），[（CH 3）2 NH 2 ] 1.5 [Ln 1.5（TATAT）（H 2 O）4.5 ]· x（溶剂）{Ln = Tb，Eu ，Dy和Gd；H 6 TATAT = 5,5'，5''-（1,3,5-triazine-2,4,6-triyl）tris（azanediyl）triisophthalate}。所述LN-MOFs材料是三维（3D）阴离子框架和具有与路易斯碱性氮装饰孔环境正方形通道的两种尺寸（8.9×8.9埃和4.3×4.3埃）。Ln-MOF的3D框架可以简化为（4,6）连接她网络。由于阴离子骨架性质，Ln-MOF可以在存在类似尺寸的阴离子或中性染料的情况下有效地选择和分离阳离子染料。Tb-MOF，Eu-MOF，Dy-MOF和Gd-MOF的亚甲基蓝吸附量分别为147、141、133和143 mg g –1。此外，Tb-MOF和Eu-MOF可以通过溶剂变色轻松检测和鉴定乙醇，乙腈和乙醚。乙醚蒸气还会迅速改变Tb-MOF和Eu-MOF的颜色。光致发光实验表明，Tb-MOF（在341 nm激发时），Eu-MOF（在396 nm激发时），Dy-MOF（在341 nm激发时）和Gd-MOF（在激发时）的绝对量子产率在370 nm处）分别为32.5％，11.0％，2.1％和7.1％。另外，Tb-MOF可以高选择性地检测Co 2+离子，猝灭效率为87％。
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