Synthesis, crystal structure, and absorption spectra of a complex neptunium(v) chromate, Na3[NpO2(CrO4)2](H2O)5

Budantseva, N. A.; Григорьев, М. С.; Федосеев, А. М.

doi:10.1134/s1066362211050031

Cited by 5 publications

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References 5 publications

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“…In contrast, the spectra of solid Np 5+ chromates with K, Na, Cs, NH 4 , and guanidinium show the same character as the spectrum of (H 2 en) 3 [NpO 2 (CrO 4 ) 2 ] and also contain wide intense bands with the bathochromic shift by 50−60 nm. 82 Moreover, the similar situation was found for some other compounds, for e x a m p l e , [ N p O 2 ( I O 3 ) ] 84 whose spectra also exhibit significant widening and a redshift (Table S12). This effect is not yet clear and further studies are needed to address this problem.…”

Section: Structural Comparisons and Topological Analysissupporting

confidence: 73%

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Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

et al. 2021

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Uranyl compounds with tetrahedral oxoanions demonstrate a significant structural and topological diversity. Complexes of transuranium elements with such anions are not equally well-represented in the literature. To answer the question about the structural similarity in a series of An6+ complexes with XO4 2– anions, we synthesized and studied 10 new U, Np, and Pu chromates with outer-sphere organic cations. The structural analysis and comparison with the literature data shows that the Np and Pu complexes are generally based on the same structural blocks as the uranyl compounds. Moreover, the chromate anion does not show any unique structural role as compared to the sulfate and selenate ions. As a result, the neptunium and plutonium chromates contain 1D and 2D structural units similar to those found in the uranyl sulfates and selenates. The templating role of the outer-sphere cations in the actinyl complexes with tetrahedral oxoanions is also not evident, and there is no clear correlation between the nature of the outer-sphere cations and the topology of the structural units.

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Section: Structural Comparisons and Topological Analysissupporting

confidence: 73%

“…The ν(PuO 2 ) stretching vibration is exhibited by the highest energy and the best-resolved component at 908 cm –1 . The spectra of the numerous actinyl compounds with different ligands − were used to assign ν(AnO 2 ) vibrations in the spectra of other studied compounds.…”

Section: Results and Discussionmentioning

confidence: 99%

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

et al. 2021

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“…In the IR range, the spectra of all complexes have a simple character (Figures S9–S13 of the SI) and data on the spectra of related compounds − were used to assign absorption bands (Table ). In the 4000–3000 cm –1 range, wide absorption bands of various intensities are observed in all spectra.…”

Section: Resultsmentioning

confidence: 99%

Mixed-Valence Np^V/An^VI Molybdate Complexes with Single-Charge Outer-Sphere Cations

Grigoriev,

Charushnikova,

Budantseva

et al. 2023

Inorg. Chem.

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Five new mixed-valence NpV/AnVI molybdates of the composition [C(NH2)3]3[(NpVO2)(NpVIO2)(MoO4)3(H2O)]·H2O (1), [C(NH2)3]3[(NpVO2)(NpVIO2)(MoO4)3(H2O)]·3H2O (2), Na3[(NpVO2)(PuVIO2)(MoO4)3(H2O)]·nH2O (3), Na6[(NpVO2)2(UVIO2)(MoO4)5]·13H2O (4), and LiNa2[(NpVO2)(NpVIO2)2(MoO4)4(H2O)]·4H2O (5) have been synthesized and structurally characterized. The coordination polyhedra of the NpV and AnVI atoms in compounds 1–5 are pentagonal bipyramids. The basis of structures 1–3 is anionic layers of the composition [(NpVO2)(AnVIO2)(MoO4)3(H2O)] n 3n–. Three crystallographically independent molybdate ions are tridentate-bridging ligands. The water molecule, which is a part of the anion layer, is coordinated to the NpV atom. The anionic layers in complexes 2 and 3 have the same structure, different from 1. The basis of structure 4 is anionic layers of the composition [(NpVO2)2(UVIO2)(MoO4)5] n 6n–, the structure of which differs from the structure of anionic layers in 1–3. Complex 5 has a three-dimensional (3D) structure. The spectra of all compounds in the UV–visible and IR ranges were measured and analyzed.

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“…75 78 Three Th(IV) clusters have been obtained from reaction of ''thorium hydroxide'' with carboxylic acids, all having a [Th 6 (m 3 -O) 4 (m 3 -OH) 4 ] 12+ core with carboxylates on the outside. 79 86 Plutonium can only enter cells under certain conditions, as the iron-transport protein, transferrin, will only bind Pu in the presence of iron. 87 The oxidation state of intracellular plutonium has been determined by microprobe X-ray absorption near edge structure measurements.…”

Section: Other Actinidesmentioning

confidence: 99%

The actinides

Cotton

2012

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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Synthesis, crystal structure, and absorption spectra of a complex neptunium(v) chromate, Na3[NpO2(CrO4)2](H2O)5

Cited by 5 publications

References 5 publications

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

Mixed-Valence Np^V/An^VI Molybdate Complexes with Single-Charge Outer-Sphere Cations

The actinides

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Synthesis, crystal structure, and absorption spectra of a complex neptunium(v) chromate, Na3[NpO2(CrO4)2](H2O)5

Cited by 5 publications

References 5 publications

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates

Mixed-Valence NpV/AnVI Molybdate Complexes with Single-Charge Outer-Sphere Cations

The actinides

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Mixed-Valence Np^V/An^VI Molybdate Complexes with Single-Charge Outer-Sphere Cations