State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , P. R. China.
Centro de Química Estrutural, Complexo I, Instituto Superior Técnico , Universidade de Lisboa , Av. Rovisco Pais , 1049-001 Lisbon , Portugal.
ACS Appl Mater Interfaces. 2018 Jul 18;10(28):23976-23986. doi: 10.1021/acsami.8b06103. Epub 2018 Jul 2.
A new series of five three-dimensional Ln(III) metal-organic frameworks (MOFs) formulated as [Ln(μ-L)(μ-HCOO)(μ-OH)(μ-O)(DMF)(HO)] {Ln = Tb (1), Eu (2), Gd (3), Dy (4), and Er (5)} was successfully obtained via a solvothermal reaction between the corresponding lanthanide(III) nitrates and 2-(6-carboxypyridin-3-yl)terephthalic acid (HL). All of the obtained compounds were fully characterized, and their structures were established by single-crystal X-ray diffraction. All products are isostructural and possess porous 3D networks of the fluorite topological type, which are driven by the cubane-like [Ln(μ-OH)(μ-O)(μ-HCOO)] blocks and μ-L spacers. Luminescent and sensing properties of 1-5 were investigated in detail, revealing a unique capability of Tb-MOF (1) for sensing acetone and metal(III) cations (Fe or Ce) with high efficiency and selectivity. Apart from a facile recyclability after sensing experiments, the obtained Tb-MOF material features a remarkable stability in a diversity of environments such as common solvents, aqueous solutions of metal ions, and solutions with a broad pH range from 4 to 11. In addition, compound 1 represents a very rare example of the versatile Ln-MOF probe capable of sensing Ce or Fe cations or acetone molecules.
成功地通过在相应的镧系元素（III）硝酸盐和 2-(6-羧基吡啶-3-基）对苯二甲酸（HL）之间的溶剂热反应得到了五个新的三维 Ln(III) 金属-有机骨架（MOFs）系列，分别为[Ln(μ-L)(μ-HCOO)(μ-OH)(μ-O)(DMF)(HO)]，Ln= Tb(1)、Eu(2)、Gd(3)、Dy(4)和 Er(5)。所有得到的化合物都经过了充分的表征，并通过单晶 X 射线衍射确定了它们的结构。所有产物均为同构的，具有萤石拓扑类型的多孔 3D 网络，由类似立方烷的[Ln(μ-OH)(μ-O)(μ-HCOO)]块和μ-L 间隔物驱动。详细研究了 1-5 的发光和传感性能，揭示了 Tb-MOF(1)对丙酮和金属（III）阳离子（Fe 或 Ce）具有高效和选择性传感的独特能力。除了在传感实验后具有易于回收的特点外，所获得的 Tb-MOF 材料在各种环境中都具有显著的稳定性，例如常见溶剂、金属离子的水溶液以及 pH 值范围从 4 到 11 的溶液。此外，化合物 1 代表了一种非常罕见的多功能 Ln-MOF 探针的例子，能够传感 Ce 或 Fe 阳离子或丙酮分子。
