Water-Stable Metal鈥揙rganic Frameworks for Fast and High Dichromate Trapping via Single-Crystal-to-Single-Crystal Ion Exchange

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• 作者：Hong-Ru Fu ; Zhong-Xuan Xu ; Jian Zhang
• 刊名：Chemistry of Materials
• 出版年：2015
• 出版时间：January 13, 2015
• 年：2015
• 卷：27
• 期：1
• 页码：205-210
• 全文大小：545K
• ISSN：1520-5002

文摘

Two metal鈥搊rganic frameworks [Zn₂(Tipa)₂(OH)]路3NO₃路12H₂O (FIR-53, FIR denotes Fujian Institute of Research, Tipa = tris(4-(1H-imidazol-1-yl)phenyl)amine)) and [Zn(Tipa)]路2NO₃路DMF路4H₂O) (FIR-54) with large nanotubular channels were synthesized via Zn(II) ions coordinate the neutral Tipa ligand. The framework of FIR-53 contains 1D channels along the c axis with a cross section of 18 脳 13 脜². FIR-54 also consists of large channels with the 10.5 脳 10.5 脜² open windows. These porous materials efficiently trap Cr₂O₇^{2鈥?/sup> inorganic pollutant ions via the single-crystal-to-single-crystal (SC-SC) approach. The Cr₂O₇2鈥?/sup> uptake capacities of FIR-53 and FIR-54 are high to 74.2 and 103 mg/g, respectively. Furthermore, the Cr₂O₇2鈥?/sup> trapping鈥搑eleasing process of FIR-53 displays good regeneration. Meaningfully, the structure of FIR-53 after ion exchange can be accurately obtained by single-crystal X-ray diffraction, which further elaborates the SC-SC transformation.}