Zhuanling Bai, Yanlong Wang,Yuxiang Li, Wei Liu,LanhuaChen,DaopengSheng, Juan Diwu,Zhifang Chai,Thomas E. Albrecht-Schmitt,and Shuao Wang, "First Cationic Uranyl organic Framework with Anion Exchange Capabilities" Inorg. Chem. accepted.
ABSTRACT
By changing the H2O/DMF content during the self-assemble process of zwitterionic-based ligand with uranyl cations, we observed a structural evolution from a neutral uranyl organic framework [(UO2)2(TTTPC)(OH)O(COOH)]·1.5DMF·7H2O (SCU-6) to the first cationic uranyl organic framework with the formula of[(UO2)(HTTTPC)(OH)]Br·1.5DMF·4H2O(SCU-7). The crystal structures of SCU-6 and SCU-7 are layers built with tetranuclear and dinuclear uranyl cluster respectively. Exchangeable halide anions are present in the interlaminar spaces balancing the positive charge of layers in SCU-7. Therefore,SCU-7 is able to effectively remove perrhenate anions from aqueous solution. Meanwhile, the H2PO4- exchanged SCU-7 materials exhibits a moderate proton conductivity of 8.70 ×10-5 S cm-1 at 50 oC and 90 % relative humidity, representing nearly 80 times enhancement compared to the original material.
