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首页> 外文期刊>Chemistry: A European journal >A Metal-Organic Framework Containing Unusual Eight-Connected Zr-Oxo Secondary Building Units and Orthogonal Carboxylic Acids for Ultra-sensitive Metal Detection
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A Metal-Organic Framework Containing Unusual Eight-Connected Zr-Oxo Secondary Building Units and Orthogonal Carboxylic Acids for Ultra-sensitive Metal Detection

机译：金属有机框架包含异常的八连接Zr-Oxo二级建筑单元和正交羧酸用于超灵敏金属检测

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摘要

Two metal-organic frameworks (MOFs) with Zr-oxo secondary building units (SBUs) were prepared by using p,p-terphenyldicarboxylate (TPDC) bridging ligands pre-functionalized with orthogonal succinic acid (MOF-1) and maleic acid groups (MOF-2). Single-crystal X-ray structure analysis of MOF-1 provides the first direct evidence for eight-connected SBUs in UiO-type MOFs. In contrast, MOF-2 contains twelve-connected SBUs as seen in the traditional UiO MOF topology. These structural assignments were confirmed by extended X-ray absorption fine structure (EXAFS) analysis. The highly porous MOF-1 is an excellent fluorescence sensor for metal ions with the detection limit of <0.5 ppb for Mn(2+)and three to four orders of magnitude greater sensitivity for metal ions than previously reported luminescent MOFs.
机译：通过使用由正交琥珀酸（MOF-1）和马来酸基团（MOF）预功能化的对，对-叔苯基二羧酸酯（TPDC）桥接配体，制备了两个具有Zr-氧代二级建筑单元（SBU）的金属有机框架（MOF）。 -2）。 MOF-1的单晶X射线结构分析为UiO型MOF中的八连接SBU提供了第一个直接证据。相反，如传统的UiO MOF拓扑所示，MOF-2包含十二个连接的SBU。通过扩展的X射线吸收精细结构（EXAFS）分析确认了这些结构分配。高度多孔的MOF-1是一种出色的金属离子荧光传感器，对锰（2+）的检测极限<0.5 ppb，对金属离子的灵敏度比以前报道的发光MOF高三到四个数量级。

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