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Use of Zwitterionic Ligands in Uranyl Hybrid Materials: Explorations on the Structural Features that Control Water Ordering and Mobility

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journal contribution
posted on 16.10.2017, 00:00 by Maurice K. Payne, Rebecca C. Laird, Margaret A. Schnell, Samantha R. Mackin, Tori Z. Forbes
Development of novel materials for water purification and storage is reliant on our understanding of the interaction of water within solid-state materials and inspired by the high selectivity present in certain biological systems. The present study investigates the influence of zwitterionic ligands on water properties within hybrid materials through the synthesis and characterization of four novel coordination polymers built from the uranyl unit and an imidazolium dicarboxylate (Imd) linker. One of the compounds (UIM-5) hosts an infinite water chain of edge sharing hexamers and octamers of hydrogen bonded water molecules. The other three compounds (UIM-2A, 2B, 2C) make up a polymorphic system in which the guest water molecules are found in varying degrees of isolation. We further explore the expansive literature on uranyl hybrid materials to identify common water nets and possible structural features that may control water structure and properties.

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