Fu Hong-Ru, Zhao Ying, Zhou Zhan, Yang Xiao-Gang, Ma Lu-Fang
College of Chemistry and Chemical Engineering, Henan Province Function-oriented Porous Materials Key Laboratory, Luoyang Normal University, Luoyang 471934, P. R. China.
Dalton Trans. 2018 Mar 12;47(11):3725-3732. doi: 10.1039/c8dt00206a.
One neutral tripodal semi-rigidity ligand tri(4-imidazolylphenyl)amine (TIPA) with excellent hole-transfer nature, was selected as a linker to construct MOFs. Two two-dimensional (2D) microporous metal-organic frameworks (MOFs) were synthesized solvothermally: [Ni(TIPA)(COO)(HO)]·2(DMF)2(HO) (1) and [Cd(TIPA)(ClO)]·(DMF)3(HO) (2). Compound 1 incorporated carboxylic groups into the channel and exhibited the high capacity of light hydrocarbons as well as the remarkable selectivity of CH/CH. The value is in excess of 100 at room temperature, which is the highest value reported to date. Compound 2, as a cationic framework with high water stability, was not only applied as a sensor, displaying the ultrahigh sensitivity against CrO with a detection limit as low as 8 ppb, but also possessed excellent Cr(vi) sorption with good repeatability in aqueous solution. This study provides an efficient strategy to design cationic MOFs for the selective separation of light hydrocarbons and the sensing and trapping of toxic chromate for the purification of water.
选择一种具有优异空穴传输性质的中性三脚架半刚性配体三（4-咪唑基苯基）胺（TIPA）作为连接体来构建金属有机框架（MOF）。通过溶剂热法合成了两种二维（2D）微孔金属有机框架：[Ni(TIPA)(COO)(HO)]·2(DMF)2(HO)（1）和[Cd(TIPA)(ClO)]·(DMF)3(HO)（2）。化合物1将羧基引入孔道，对轻烃表现出高容量以及对CH/CH的显著选择性。该值在室温下超过100，是迄今为止报道的最高值。化合物2作为具有高水稳定性的阳离子框架，不仅用作传感器，对CrO表现出超低检测限（低至8 ppb）的超高灵敏度，而且在水溶液中对Cr(Ⅵ)具有优异的吸附性且重复性良好。本研究提供了一种有效的策略，用于设计阳离子MOF，以实现轻烃的选择性分离以及对有毒铬酸盐的传感和捕获，从而净化水。
