Structural chemistry of uranium phosphonates

Yang, Weiting; Parker, T. Gannon; Sun, Zhong‐Ming

doi:10.1016/j.ccr.2015.05.010

Cited by 130 publications

(74 citation statements)

References 74 publications

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“…that are otherwise inaccessible via traditional coordination chemistry. [1][2][3][4][5][6][7][8][9][10][11][12][13] Within the crystal engineering umbrella is supramolecular assembly, and use of this approach for producing uranyl hybrid materials necessitates a cognizance of the relationship between intra-and intermolecular interactions and resulting global structures. [14][15][16] Judicious selection of uranyl acceptordonor pairings allows for exercising some control over the nature and directionality of non-covalent interactions within uranyl hybrid materials, which is particularly attractive as it allows for tectons and synthons to be selected for, thereby avoiding unpredictable uranyl hydrolysis products.…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, we describe the synthesis and characterization of three 'bent' complexes (1-3) featuring 2,4,6-trihalobenzoic acid ligands (where Hal=F, Cl, and Br) and 1,10-phenanthroline (phen), along with nine additional 'non-bent' hybrid materials that either co-formed with the 'bent' complexes (4)(5)(6) or were prepared as part of complementary efforts to understand the mechanism(s) of uranyl bending (7)(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

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How to Bend the Uranyl Cation via Crystal Engineering

et al. 2018

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Bending the linear uranyl (UO) cation represents both a significant challenge and opportunity within the field of actinide hybrid materials. As part of related efforts to engage the nominally terminal oxo atoms of uranyl cation in noncovalent interactions, we synthesized a new uranyl complex, [UO(CHN)(CHClO)]·2HO (complex 2), that featured both deviations from equatorial planarity and uranyl linearity from simple hydrothermal conditions. Based on this complex, we developed an approach to probe the nature and origin of uranyl bending within a family of hybrid materials, which was done via the synthesis of complexes 1-3 that display significant deviations from equatorial planarity and uranyl linearity (O-U-O bond angles between 162° and 164°) featuring 2,4,6-trihalobenzoic acid ligands (where Hal = F, Cl, and Br) and 1,10-phenanthroline, along with nine additional "nonbent" hybrid materials that either coformed with the "bent" complexes (4-6) or were prepared as part of complementary efforts to understand the mechanism(s) of uranyl bending (7-12). Complexes were characterized via single crystal X-ray diffraction and Raman, infrared (IR), and luminescence spectroscopy, as well as via quantum chemical calculations and density-based quantum theory of atoms in molecules (QTAIM) analysis. Looking comprehensively, these results are compared with the small library of bent uranyl complexes in the literature, and herein we computationally demonstrate the origin of uranyl bending and delineate the energetics behind this process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How to Bend the Uranyl Cation via Crystal Engineering

et al. 2018

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“…This compensation mechanism with formation of hydronium cations is less common while known for uranyl chromates [19]. Formation of low charge-density nets upon use of spacer ligands is also common for another numerous class of uranyl compounds, the phosphonates [42]. Related patterns may be also expected for phosphates where polymeric chains are also common.…”

Section: Discussionmentioning

confidence: 98%

Complex Uranyl Dichromates Templated by Aza-Crowns

et al. 2018

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Three new uranyl dichromate compounds templated by aza-crown templates were obtained at room temperature by evaporation from aqueous solutions: 4 (3). The use of aza-crown templates made it possible to isolate unprecedented and complex one-dimensional units in 2 and 3, whereas the structure of 1 is based on simple uranyl-dichromate chains. It is very likely that the presence of relatively large organic molecules of aza-crown ethers does not allow uranyl chromate chain complexes to condense into the units of higher dimensionality (layers or frameworks). In general, the formation of 1, 2, and 3 is in agreement with the general principles elaborated for organically templated uranyl compounds. The negative charge of the [(UO 2 )(Cr 2 O 7 ) 2 (H 2 O)] 2− , [(UO 2 ) 2 (CrO 4 ) 2 (Cr 2 O 7 ) 2 (H 2 O)] 4− and [(UO 2 ) 3 (CrO 4 ) 4 (Cr 2 O 7 ) 2 ] 6− one-dimensional inorganic motifs is compensated by the protonation of all nitrogen atoms in the molecules of aza-crowns.

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“…It has been an active area of exploration on uranyl complexes since the suitable starting materials were discovered. [1,2] The uranium, as a good candidate element for mixed organicinorganic extended networks complexes has novel chemical compositions and physicochemical properties, [3][4][5][6][7] such as biomedical imaging, [8,9] luminescence sensors [10] and sensors over light-emitting devices (LEDs, OLEDs). [11,12] ion exchange, [13] proton conductivity, [14] intercalation chemistry, [15] photochemistry, [16] nonlinear optics, [17] selective oxidation catalysis, nuclear power, [18] X-ray attenuation and detection [19,20] and so on.…”

Section: Introductionmentioning

confidence: 99%

“…[27,28] Though uranium was the most thoroughly studied elements of the actinides, [29,30] the coordination chemistry of uranium still needs further research. [31] In addition, it can also provide a new perspective to find a better way to absorb pollutants from environment by studying on uranyl-bearing metal organic frameworks (MOFs) materials. [32] For example, Li et.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Inorganic‐Organic U‐MOF Materials with Nitrogen Heterocyclic Carboxylate: Synthesis, Structure and Properties

Wang

Zhang

et al. 2020

ChemistrySelect

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Two uranyl MOF complexes [(UO2)2(TTHA)]⋅[NH2(CH3)2]2⋅(H2O)3 (1) (H6TTHA=1,3,5‐triazine‐2,4,6‐triamine hexa acetic acid) and (UO2)(HL)2(H2O)2 (2) (L=5‐methyl‐1‐(4‐carboxylphenyl)‐1H‐1,2,3‐triazole‐4‐carboxylic acid) were synthesized by the reaction of uranyl acetate as the metal source with H6TTHA and triazole‐carboxylic acid (L) as the ligand, respectively. They were characterized by elemental analysis, IR, UV‐Vis, PXRD, single crystal X‐ray diffraction and thermal gravimetric analysis. The structural analysis showed that complexes 1 and 2 were covalent inorganic‐organic framework structures. The complex 1 exhibited a self‐assembly 3D structure and 2 was a 2D supramolecular structure by the hydrogen bonding interaction. In order to explore their functional properties, their photoluminescence, surface photovoltage and dye adsorption properties have been also studied and discussed initially. The results showed that complexes 1, 2 exhibited some features in dye adsorption.

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Structural chemistry of uranium phosphonates

Cited by 130 publications

References 74 publications

How to Bend the Uranyl Cation via Crystal Engineering

How to Bend the Uranyl Cation via Crystal Engineering

Complex Uranyl Dichromates Templated by Aza-Crowns

Multifunctional Inorganic‐Organic U‐MOF Materials with Nitrogen Heterocyclic Carboxylate: Synthesis, Structure and Properties

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