Uncommon Pyrazoyl-Carboxyl Bifunctional Ligand-Based Microporous Lanthanide Systems: Sorption and Luminescent Sensing Properties

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• 作者：Gao-Peng Li ; Ge Liu ; Yong-Zhi Li ; Lei Hou ; Yao-Yu Wang ; Zhonghua Zhu
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：April 18, 2016
• 年：2016
• 卷：55
• 期：8
• 页码：3952-3959
• 全文大小：616K
• 年卷期：0
• ISSN：1520-510X

文摘

Seven new isostructural lanthanide metal–organic frameworks (Ln-MOFs), [Ln(Hpzbc)₂(NO₃)]·H₂O (1-Ln, Ln = Nd³⁺, Sm³⁺, Eu³⁺, Gd³⁺, Tb³⁺, Er³⁺, and Yb³⁺ ions, H₂pzbc = 3-(1H-pyrazol-3-yl) benzoic acid), with one-dimensional (1D) channels decorated by nitrate anions and pyrazoyl groups have been constructed. 1-Ln, as revealed by structural analysis, represent uncommon microporous 3D Ln-pyrazoyl-carboxyl systems using pyrazoyl-carboxyl bifunctional ligands as bridges. The luminescent investigations show that 1-Eu is an excellent MOF-based fluorescent probe, with high sensitivity, selectivity, and simple regeneration, for environmentally relevant Fe³⁺ and Cr₂O₇^2– ions. 1-Eu also presents highly selective capture for CO₂ over N₂ and CH₄ due to the multiple binding sites for CO₂ molecules, which were supported by Grand Canonical Monte Carlo (GCMC) simulations.