First Cationic Uranyl-Organic Framework with Anion-Exchange Capabilities

Zhuanling Bai; Yanlong Wang; Yuxiang Li; Wei Liu; Lanhua Chen; Daopeng Sheng; Juan Diwu; Zhifang Chai; Thomas E Albrecht-Schmitt; Shuao Wang

doi:10.1021/acs.inorgchem.6b00930

First Cationic Uranyl-Organic Framework with Anion-Exchange Capabilities

Inorg Chem. 2016 Jul 5;55(13):6358-60. doi: 10.1021/acs.inorgchem.6b00930. Epub 2016 Jun 16.

Authors

Zhuanling Bai^{1

2}, Yanlong Wang^{1

2}, Yuxiang Li^{1

2}, Wei Liu^{1

2}, Lanhua Chen^{1

2}, Daopeng Sheng^{1

2}, Juan Diwu^{1

2}, Zhifang Chai^{1

2}, Thomas E Albrecht-Schmitt³, Shuao Wang^{1

2}

Affiliations

¹ School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University , Jiangsu 215123, China.
² Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions , Jiangsu 215123, China.
³ Department of Chemistry and Biochemistry, Florida State University , 95 Chieftain Way, Tallahassee, Florida 32306, United States.

PMID: 27310580
DOI: 10.1021/acs.inorgchem.6b00930

Abstract

By controlling the extent of hydrolysis during the self-assembly process of a zwitterionic-based ligand with uranyl cations, we observed a structural evolution from the 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 clusters, 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 material exhibits a moderate proton conductivity of 8.70 × 10(-5) S cm(-1) at 50 °C and 90% relative humidity, representing nearly 80 times enhancement compared to the original material.