A Robust Luminescent Tb(III)-MOF with Lewis Basic Pyridyl Sites for the Highly Sensitive Detection of Metal Ions and Small Molecules

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• 作者：Jun Zhao ; Ye-Nan Wang ; Wen-Wen Dong ; Ya-Pan Wu ; Dong-Sheng Li ; Qi-Chun Zhang
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：April 4, 2016
• 年：2016
• 卷：55
• 期：7
• 页码：3265-3271
• 全文大小：545K
• ISSN：1520-510X

文摘

A new luminescent terbium–metal–organic framework [Tb₃(L)₂(HCOO)(H₂O)₅]·DMF·4H₂O (1) (H₄L = 4,4′-(pyridine-3,5-diyl)diisophthalic acid) has been successfully assembled by Tb³⁺ ions and an undeveloped pyridyl-tetracarboxylate. Compound 1 exhibits a 3D porous (3,8)-connected (4.5²)₂(4².5¹².6⁶.7⁵.8³) topological framework with fascinating 1D open hydrophilic channels decorated by uncoordinated Lewis basic pyridyl nitrogen atoms. In particular, the Tb-MOF (1) can detect Cu²⁺ ions with high selectivity and sensitivity, and its luminescence is nearly entirely quenched in N,N-dimethylformamide (DMF) solution and biological system. In addition, 1 still has high detection for the trace content of nitromethane with 70 ppm, which suggests that 1 is a promising example of dual functional materials with sensing copper ions and nitromethane.