Synthesis and crystal structure of a new neodymium(III) selenate-selenite: Nd2(SeO4)(SeO3)2(H2O)2

Feng, Mei‐Ling; Mao, Jiang‐Gao

doi:10.1016/j.jallcom.2004.06.091

Cited by 17 publications

(5 citation statements)

References 28 publications

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“…This suggests that the present compound is a semiconductor and is consistent with its light-green color. Similar to the vibrational modes and frequencies observed in other compounds with diselenite or selenite anions, 21 the IR absorption bands at 1029, 832 and 711 cm −1 can be assigned to m(Se-O) vibrations in 1 (Fig. S1 §).…”

Section: Spectral Propertiessupporting

confidence: 75%

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Zou¹,

Guo²,

Lu³

et al. 2007

Dalton Trans.

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A new mixed-framework mercury selenide diselenite, (Hg(3)Se(2))(Se(2)O(5)) (1), has been prepared by a solid-state reaction and structurally characterized by single-crystal X-ray diffraction analysis. The crystal structure of 1 consists of parallel stair-like cationic (Hg(3)Se(2))(2+) chains, which are bridged by (Se(2)O(5))(2-) anionic groups to form a novel 2-D layered mixed-framework. The optical properties were investigated in terms of the diffuse reflectance and microscopic infrared spectra. The electronic band structure along with density of states (DOS) calculated by the DFT method indicates that compound 1 is a semiconductor, and that the optical absorption of 1 is mainly ascribed to the charge transitions from the O-2p and Se(-II)-4p states to the Se(IV)-4p and Hg-6s states.

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Section: Spectral Propertiessupporting

confidence: 75%

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Zou¹,

Guo²,

Lu³

et al. 2007

Dalton Trans.

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“…As a result, mixed-valent selenite selenate compounds are common and represent a growing family of transition-metal and f-block oxoanion solids. Examples of these materials include Ag 4 (Mo 2 O 5 )(SeO 4 ) 2 (SeO 3 ) 2 , Au 2 (SeO 3 ) 2 (SeO 4 ), Nd 2 (SeO 4 )(SeO 3 ) 2 (H 2 O) 2 , Er(SeO 3 )(SeO 4 ) 0.5 H 2 O, [C 5 H 14 N][UO 2 (SeO 4 )(SeO 2 OH)], [C 5 H 14 N] 4 [(UO 2 ) 3 (SeO 4 ) 4 (HSeO 3 )(H 2 O)](H 2 SeO 3 )(HSeO 4 ), etc. The ThO 9 polyhedra edge-share to form 1D chains through the bridging of SeO 3 2– along the a axis.…”

Section: Resultsmentioning

confidence: 99%

Probing the Influence of Acidity and Temperature to Th(IV) on Hydrolysis, Nucleation, and Structural Topology

et al. 2017

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Systematic control of the molar ratio between thorium hydroxides and selenic acid and their reaction temperature under hydrothermal conditions results in four novel thorium-based selenate complexes, namely, [ThO(OH)(SeO)(HO)]·(SeO)·13HO (Th-1), [ThO(OH)(SeO)(HO)]·7HO (Th-2), Th(OH)(SeO)HO (Th-3), and Th(SeO)(HO)·2.5HO (Th-4), as well as the thorium mixed selenite selenate compound Th(SeO)(SeO) (Th-5). Smaller [HSeO]/[Th(IV)] ratio or lower temperature give rise to the formation of octameric [Th(μ-O)(μ-OH)] cores in Th-1/Th-2 and infinite [Th(μ-OH)HO] chains in Th-3, respectively. Increasing the [HSeO]/[Th(IV)] ratio or elevating the temperature generates a microporous (11.3 Å voids) open-framework Th-4, a monomeric thorium species without oxo/hydroxyl ligands, and a three-dimensional thorium structure Th-5. Formation of these compounds suggests that variables including acidity and temperature play a critical role in the hydrolysis and oligomerization of Th ions. Increasing acidity limits the deprotonation of water molecules and formation of nucleophilic hydroxo/oxo-aquo Th species, and high temperature appears to suppress the olation/oxolation hydrolysis reactions, which in both ways limit the formation of the thorium oligomers.

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“…While Sc 2 (SeO 3 ) 2 (SeO 4 ) was prepared through the oxidation reaction of Se 4+ O 2 in the presence of a nitrate, Sc(NO 3 ) 3 · x H 2 O, Sc 2 (TeO 3 )(SeO 3 )(SeO 4 ) was obtained by reduction of H 2 Se 6+ O 4 during hydrothermal reactions. A number of mixed-valent selenite–selenate compounds have been synthesized through similar redox reactions under hydrothermal reaction conditions. ,− However, no redox reactions occurred during preparation of Sc 2 (TeO 3 ) 3 , since the material was prepared by a solid-state reaction in vacuum.…”

Section: Resultsmentioning

confidence: 99%

Rich Structural Chemistry in Scandium Selenium/Tellurium Oxides: Mixed-Valent Selenite–Selenates, Sc₂(SeO₃)₂(SeO₄) and Sc₂(TeO₃)(SeO₃)(SeO₄), and Ternary Tellurite, Sc₂(TeO₃)₃

Song

Lee

2014

Inorg. Chem.

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Both single crystals and pure bulk phases of three new scandium selenium/tellurium oxides, Sc2(SeO3)2(SeO4), Sc2(TeO3)(SeO3)(SeO4), and Sc2(TeO3)3, have been synthesized through hydrothermal and solid-state reactions. X-ray diffractions were used to determine the structures and confirm the phase purities of the reported materials. Isostructural Sc2(SeO3)2(SeO4) and Sc2(TeO3)(SeO3)(SeO4) reveal three-dimensional frameworks with ScO7 pentagonal bipyramids, SeO3 (and TeO3) trigonal pyramids, and SeO4 tetrahedra. A novel ternary scandium tellurite, Sc2(TeO3)3, also shows a three-dimensional framework that is composed of ScO6 octahedra, ScO7-capped octahedra, and TeO3 trigonal pyramids. All three materials accommodate local asymmetric coordination moieties owing to the lone pairs on Se(4+) and Te(4+) cations. The effect of coordination environments of constituent cations on the frameworks, dimensionalities, and centricities of products is discussed. Thorough characterizations including elemental analyses, infrared and UV-vis diffuse reflectance spectroscopies, thermal analyses, and dipole moment calculations for the reported materials are reported. Crystal data: Sc2(SeO3)2(SeO4), monoclinic, space group P21/c (No. 14), a = 6.5294(2) Å, b = 10.8557(4) Å, c = 12.6281(6) Å, β = 103.543(3)°, V = 870.21(6) Å(3), and Z = 4; Sc2(TeO3)(SeO3)(SeO4), monoclinic, space group P21/c (No. 14), a = 6.5345(12) Å, b = 10.970(2) Å, c = 12.559(2) Å, β = 102.699(10)°, V = 878.3(6) Å(3), and Z = 4; Sc2(TeO3)3, monoclinic, space group P21/n (No. 14), a = 5.2345(3) Å, b = 24.3958(15) Å, c = 6.8636(4) Å, β = 106.948(2)°, V = 838.42(9) Å(3), and Z = 4.

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Synthesis and crystal structure of a new neodymium(III) selenate-selenite: Nd2(SeO4)(SeO3)2(H2O)2

Cited by 17 publications

References 28 publications

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Probing the Influence of Acidity and Temperature to Th(IV) on Hydrolysis, Nucleation, and Structural Topology

Rich Structural Chemistry in Scandium Selenium/Tellurium Oxides: Mixed-Valent Selenite–Selenates, Sc₂(SeO₃)₂(SeO₄) and Sc₂(TeO₃)(SeO₃)(SeO₄), and Ternary Tellurite, Sc₂(TeO₃)₃

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Synthesis and crystal structure of a new neodymium(III) selenate-selenite: Nd2(SeO4)(SeO3)2(H2O)2

Cited by 17 publications

References 28 publications

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Synthesis, crystal and band structures, and optical properties of a new mixed-framework mercury selenide diselenite, (Hg3Se2)(Se2O5)

Probing the Influence of Acidity and Temperature to Th(IV) on Hydrolysis, Nucleation, and Structural Topology

Rich Structural Chemistry in Scandium Selenium/Tellurium Oxides: Mixed-Valent Selenite–Selenates, Sc2(SeO3)2(SeO4) and Sc2(TeO3)(SeO3)(SeO4), and Ternary Tellurite, Sc2(TeO3)3

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Product

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Rich Structural Chemistry in Scandium Selenium/Tellurium Oxides: Mixed-Valent Selenite–Selenates, Sc₂(SeO₃)₂(SeO₄) and Sc₂(TeO₃)(SeO₃)(SeO₄), and Ternary Tellurite, Sc₂(TeO₃)₃