American Chemical Society
ic6b00293_si_002.cif (1.98 MB)

Hydrolytically Stable Nanoporous Thorium Mixed Phosphite and Pyrophosphate Framework Generated from Redox-Active Ionothermal Reactions

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posted on 2016-03-25, 14:07 authored by Daxiang Gui, Tao Zheng, Lanhua Chen, Yanlong Wang, Yuxiang Li, Daopeng Sheng, Juan Diwu, Zhifang Chai, Thomas E. Albrecht-Schmitt, Shuao Wang
The first thorium framework compound with mixed-valent phosphorus-based (phosphite and pyrophosphate) ligands, [BMMim]2­[Th3­(PO3)4­(H2P2O7)3] (ThP-1), was synthesized by ionothermal reactions concurrent with the partial oxidation of phosphoric acid. The overall structural topology of ThP-1 highly resembles that of MOF-5, containing only one type of three-dimensional channels with a window size of 11.32 Å × 11.32 Å. ThP-1 has a free void volume of 50.8%, making it one of the most porous purely inorganic actinide-based framework materials. More importantly, ThP-1 is highly stable in aqueous solutions over an extremely wide pH range from 1 to 14 and thus may find potential applications in selective ion exchange and catalysis.