A Metal-Organic Framework Containing Unusual Eight-Connected Zr-Oxo Secondary Building Units and Orthogonal Carboxylic Acids for Ultra-sensitive Metal Detection

作者：Carboni Michael; Lin Zekai; Abney Carter W; Zhang Teng; Lin Wenbin^*

来源：Chemistry - A European Journal, 2014, 20(46): 14965-14970.

DOI：10.1002/chem.201405194

• crystal structures
• fluorescence sensing
• functionalization
• metal sensing
• metal-organic frameworks

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.

• 出版日期2014-11-10