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Nazarchuk EV, Siidra OI, Charkin DO, Tagirova YG. Framework Uranyl Silicates: Crystal Chemistry and a New Route for the Synthesis. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114153. [PMID: 37297289 DOI: 10.3390/ma16114153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
To date, uranyl silicates are mostly represented by minerals in nature. However, their synthetic counterparts can be used as ion exchange materials. A new approach for the synthesis of framework uranyl silicates is reported. The new compounds Rb2[(UO2)2(Si8O19)](H2O)2.5 (1), (K,Rb)2[(UO2)(Si10O22)] (2), [Rb3Cl][(UO2)(Si4O10)] (3) and [Cs3Cl][(UO2)(Si4O10)] (4) were prepared at harsh conditions in "activated" silica tubes at 900 °C. The activation of silica was performed using 40% hydrofluoric acid and lead oxide. Crystal structures of new uranyl silicates were solved by direct methods and refined: 1 is orthorhombic, Cmce, a = 14.5795(2) Å, b = 14.2083(2) Å, c = 23.1412(4) Å, V = 4793.70(13) Å3, R1 = 0.023; 2 is monoclinic, C2/m, a = 23.0027(8) Å, b = 8.0983(3) Å, c = 11.9736(4) Å, β = 90.372(3) °, V = 2230.43(14) Å3, R1 = 0.034; 3 is orthorhombic, Imma, a = 15.2712(12) Å, b = 7.9647(8) Å, c = 12.4607(9) Å, V = 1515.6(2) Å3, R1 = 0.035, 4 is orthorhombic, Imma, a = 15.4148(8) Å, b = 7.9229(4) Å, c = 13.0214(7) Å, V = 1590.30(14) Å3, R1 = 0.020. Their framework crystal structures contain channels up to 11.62 × 10.54 Å filled by various alkali metals.
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Affiliation(s)
- Evgeny V Nazarchuk
- Department of Crystallography, Saint-Petersburg State University, University emb. 7/9, 199034 St. Petersburg, Russia
| | - Oleg I Siidra
- Department of Crystallography, Saint-Petersburg State University, University emb. 7/9, 199034 St. Petersburg, Russia
- Kola Science Center, Russian Academy of Sciences, 184200 Apatity, Russia
| | - Dmitri O Charkin
- Department of Chemistry, Moscow State University, Vorobievy Gory 1, bd. 3, 119991 Moscow, Russia
| | - Yana G Tagirova
- Department of Crystallography, Saint-Petersburg State University, University emb. 7/9, 199034 St. Petersburg, Russia
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2
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Two tetravalent uranium silicate and germanate crystals with three membered single-ring by molten salt method: K2USi3O9 and Cs2UGe3O9. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Morrison G, Pace KA, zur Loye HC. Mild hydrothermal synthesis of potassium uranyl phosphates with layered and framework structures. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Morrison G, Christian MS, Besmann TM, zur Loye HC. Flux Growth of Uranyl Titanates: Rare Examples of TiO 4 Tetrahedra and TiO 5 Square Bipyramids. J Phys Chem A 2020; 124:9487-9495. [DOI: 10.1021/acs.jpca.0c08869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gregory Morrison
- Center for Hierarchical Waste Form Materials, Columbia, South Carolina 29208, United States
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Matthew S. Christian
- Center for Hierarchical Waste Form Materials, Columbia, South Carolina 29208, United States
- Department of Mechanical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Theodore M. Besmann
- Center for Hierarchical Waste Form Materials, Columbia, South Carolina 29208, United States
- Department of Mechanical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Hans-Conrad zur Loye
- Center for Hierarchical Waste Form Materials, Columbia, South Carolina 29208, United States
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Pace KA, Koch RJ, Smith MD, Morrison G, Klepov VV, Besmann TM, Misture ST, zur Loye HC. Crystal Growth of Alkali Uranyl Borates from Molten Salt Fluxes: Characterization and Ion Exchange Behavior of A2(UO2)B2O5 (A = Cs, Rb, K). Inorg Chem 2020; 59:6449-6459. [DOI: 10.1021/acs.inorgchem.0c00536] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kristen A. Pace
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Robert J. Koch
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Kazuo Inamori School of Engineering, Alfred University, Alfred, New York 14802, United States
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Gregory Morrison
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Vladislav V. Klepov
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Theodore M. Besmann
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Department of Mechanical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Scott T. Misture
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Kazuo Inamori School of Engineering, Alfred University, Alfred, New York 14802, United States
| | - Hans-Conrad zur Loye
- Center for Hierarchical Waste form Materials, Columbia, South Carolina 29208, United States
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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6
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Li H, Kegler P, Alekseev EV. Crystal growth of novel 3D skeleton uranyl germanium complexes: influence of synthetic conditions on crystal structures. Dalton Trans 2020; 49:2244-2257. [PMID: 32009134 DOI: 10.1039/c9dt04750f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five centrosymmetric uranyl germanate compounds, K8BrF(UO2)3(Ge2O7)2, Rb6(UO2)3(Ge2O7)2·0.5H2O, Cs6(UO2)2Ge8O21 and A+2(UO2)3(GeO4)2 (A+ = Rb+, Cs+), were synthesized in this work. K8BrF(UO2)3(Ge2O7)2 and Rb6(UO2)3(Ge2O7)2·0.5H2O were obtained under mixed KF-KBr flux and hydrothermal conditions, respectively. Both structures crystallized in the triclinic P1[combining macron] space group and have similar anionic frameworks featuring novel hexagon shaped 12-membered channels. The condensation of two different types of SBU [UGe4] pentamers (A) and (A2) results in the formation of K8BrF(UO2)3(Ge2O7)2 and Rb6(UO2)3(Ge2O7)2·0.5H2O frameworks. Cs6(UO2)2Ge8O21 was obtained from a CsF-CsCl high temperature flux, and it also crystallized in the centrosymmetric triclinic P1[combining macron] space group. The structure of Cs6(UO2)2Ge8O21 has a novel oxo-germanate layer composed of germanate tetrahedra and trigonal bipyramids. Two new SBU types, (42·52-A2) and (54-A2) [UGe4] pentamers, were found in the structure of Cs6(UO2)2Ge8O21. A+2(UO2)3(GeO4)2 (A+ = Rb+, Cs+) were synthesized by a high temperature/high pressure (HT/HP) technique, and both structures with oval-shaped 12-membered channels crystallized in the centrosymmetric orthorhombic Pnma space group. The extreme conditions led to the formation of [U2Ge2] tetramers (E), which consist of 7-coordinated U and 5-coordinated Ge. Different synthetic methods of uranyl germanate compounds resulted in a distinct coordination environment of the uranyl cations and a variety of U[double bond, length as m-dash]O and U-O bond lengths, further affecting the dimensionality and types of uranyl units and SBUs. The Raman and IR spectra of the five new phases were collected and analyzed.
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Affiliation(s)
- Haijian Li
- Science and Technology on Combustion and Explosion Laboratory, Xi'an Modern Chemistry Research Institute, Xi'an 710065, China.
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7
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Juillerat CA, Klepov VV, Morrison G, Pace KA, Zur Loye HC. Flux crystal growth: a versatile technique to reveal the crystal chemistry of complex uranium oxides. Dalton Trans 2019; 48:3162-3181. [PMID: 30702735 DOI: 10.1039/c8dt04675a] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
This frontier article focuses on the use of flux crystal growth for the preparation of new actinide containing materials, reviews the history of flux crystal growth of uranium containing phases, and highlights the recent advances in the field. Specifically, we discuss how recent developments in f-element materials, fueled by accelerated materials discovery via crystal growth, have led to the synthesis and characterization of new families of complex uranium containing oxides, namely alkali/alkaline uranates, oxychlorides, oxychalcogenides, tellurites, molybdates, tungstates, chromates, phosphates, arsenates, vanadates, niobates, silicates, germanates, and borates. An overview of flux crystal growth is presented and specific crystal growth approaches are described with an emphasis on how and why they - versus some other method - are used and how they enable the preparation of specific classes of new materials.
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Affiliation(s)
- Christian A Juillerat
- Department of Chemistry and Biochemistry, Center for Hierarchical Wasteform Materials, University of South Carolina, Columbia, SC 29208, USA.
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Juillerat CA, Kocevski V, Morrison G, Karakalos SG, Patil D, Misture ST, Besmann TM, zur Loye HC. Flux crystal growth of uranium(v) containing oxyfluoride perovskites. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00537d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystals of three new uranium(v) containing oxyfluorides were grown out of an alkali fluoride flux and adopt a perovskite-type structure and are examined by SXRD, PXRD, XANES, XPS, EDS, magnetic susceptibility measurements, DFT calculations, and UV-vis spectroscopy.
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Affiliation(s)
- Christian A. Juillerat
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
- Center for Hierarchical Wasteform Materials (CHWM)
| | - Vancho Kocevski
- Nuclear Engineering Program
- University of South Carolina
- Columbia
- USA
- Center for Hierarchical Wasteform Materials (CHWM)
| | - Gregory Morrison
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
- Center for Hierarchical Wasteform Materials (CHWM)
| | | | - Deepak Patil
- Kazuo Inamori School of Engineering
- Alfred University
- Alfred
- USA
| | | | - Theodore M. Besmann
- Nuclear Engineering Program
- University of South Carolina
- Columbia
- USA
- Center for Hierarchical Wasteform Materials (CHWM)
| | - Hans-Conrad zur Loye
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
- Nuclear Engineering Program
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9
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Mineralogy, Crystallography and Structural Complexity of Natural Uranyl Silicates. MINERALS 2018. [DOI: 10.3390/min8120551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Naturally occurring uranyl silicates are common constituents of the oxidized parts (i.e., supergene zone) of various types of uranium deposits. Their abundance reflects the widespread distribution of Si4+ in the Earth’s crust and, therefore, in groundwaters. Up to date, 16 uranyl silicate minerals are known. Noteworthy is that the natural uranyl silicates are not extremely diverse regarding their crystal structures; it is a result of possible concentrations (activity) of Si4+ in aqueous solutions derived from dissolution of primary Si minerals or the composition of late hydrothermal fluids. Therefore, in natural systems, we distinguish in fact among two groups of uranyl silicate minerals: uranophane and weeksite-group. They differ in U:Si ratio (uranophane, 1:1; weeksite, 2:5) and they form under different conditions, reflected in distinctive mineral associations. An overview of crystal-chemistry is provided in this paper, along with the new structure data for few members of the uranophane group. Calculations of the structural complexity parameters for natural uranyl silicates are commented about as well as other groups of uranyl minerals; these calculations are also presented from the point of view of the mineral paragenesis and associations.
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Li H, Langer EM, Kegler P, Modolo G, Alekseev EV. Formation of Open Framework Uranium Germanates: The Influence of Mixed Molten Flux and Charge Density Dependence in U-Silicate and U-Germanate Families. Inorg Chem 2018; 57:11201-11216. [PMID: 30125085 DOI: 10.1021/acs.inorgchem.8b01781] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Seven novel open-framework uranyl germanates, K2(UO2)GeO4, K6(UO2)3Ge8O22, α-Cs2(UO2)Ge2O6, β-Cs2(UO2)Ge2O6, Cs2(UO2)GeO4, and A(UO2)3(Ge2O7)2 (A = [NaK6Cl]6+, [Na2Cs6Cl2]6+), were grown from different mixed molten fluxes. The three-dimensional (3D) structure of K2(UO2)GeO4 with 8-ring channels can be built upon [UGe4] pentamer secondary building units (SBUs). The 3D framework of K6(UO2)3Ge8O22 with trapezoid (Ge8O22)12- clusters consists of two types of [UGe4] pentamers. The 3D framework of α-Cs2(UO2)Ge2O6 with 10-ring channels, crystallizing in the P21/ n space group, is constructed by [UGe4] pentamers. The structure of β-Cs2(UO2)Ge2O6 contains achter (eight) single germanate chains and is composed of [UGe6] heptamers and [UGe4] pentamers. The structure of Cs2(UO2)GeO4 with hexagonal 10-ring channels is composed of [U3Ge4] heptamers and twisting five-fold GeO4 tetrahedra in four-membered Ge4O12 rings occur. 3D frameworks of NaK6Cl(UO2)3(Ge2O7)2 (space group Pnnm) and Na2Cs6Cl2(UO2)3(Ge2O7)2 ( P21/ c) can be constructed from the same SBUs [UGe4] pentamers. Thermal stability of salt-inclusions was studied by TG and PXRD analysis. Analysis of charge density for the U-Si-O system indicates that the polymerization of silicate units reduces the cross-links of the 3D frameworks. The concept of SBUs combined with the cutting and gluing strategy was applied to understand and analyze the distinct 8-, 10-, 12-, and 14- membered channels for the uranyl germanate family. The charge density of all known 3D U-Si/Ge-O frameworks has been investigated, which shows strong correlations with chemical composition of corresponding phases. The increase of Si/O (Ge/O) ratios in silicate units results in the decrease of negative charge density. Moreover, the charge density increases with decreasing countercation size within the same Si/O ratio. The correlations can be used to predict inclusion phase formation within U-Si/Ge-O families. Raman spectra of the studied uranyl germanates were measured, and bands were assigned on the basis of structural features.
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Affiliation(s)
- Haijian Li
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Eike M Langer
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Giuseppe Modolo
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Evgeny V Alekseev
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany.,Institut für Kristallographie , RWTH Aachen University , 52066 Aachen , Germany
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11
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Li H, Kegler P, Klepov VV, Klinkenberg M, Bosbach D, Alekseev EV. Comparison of Uranium(VI) and Thorium(IV) Silicates Synthesized via Mixed Fluxes Techniques. Inorg Chem 2018; 57:6734-6745. [PMID: 29767508 DOI: 10.1021/acs.inorgchem.8b01072] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two uranium and two thorium silicates were obtained using high temperature mixed fluxes methods. K14(UO2)3Si10O30 crystallizes in the P21/ c space group and contains open-branched sechser (six) single silicate chains, whereas K2(UO2)Si2O6 crystallizes in the C2/ c space group and is built of unbranched achter (eight) silicate chains. The crystals of K14(UO2)3Si10O30 and K2(UO2)Si2O6 are related by increasing U/Si molar ratios, and both structures contain the same secondary building units (SBUs), [USi6] heptamers. The triangle diagram for all known A+-UO22+-SiO44- phases demonstrates the high polymerization level of silicate groups in the system, which was compared with the family of A+-UO22+-BO33-/BO45- compounds. For both thorium silicates, the transformation of K2ThSi2O7 to K2ThSi3O9 was found to be a factor of the reaction time. K2ThSi2O7 crystallizes in the C2/ c space group and belongs to the Na2SiVISi2O7 structure type. Its 3D framework consists of diorthosilicate Si2O7 group and ThO6 octahedra. Noncentrosymmetric K2ThSi3O9 crystallizes in the hexagonal P63 space group and adopts mineral wadeite-type structure based upon triorthosilicate Si3O9 rings and ThO6 octahedra. The coordination environment of thorium for all existing oxo-anion compounds including B, Si/Ge, P/As, Cr/Mo/W, and S/Se/Te are summarized and analyzed. Additionally, spectroscopic properties of all novel materials have been studied.
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Affiliation(s)
- Haijian Li
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany.,Institut für Kristallographie , RWTH Aachen University , 52066 Aachen , Germany
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | | | - Martina Klinkenberg
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Dirk Bosbach
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
| | - Evgeny V Alekseev
- Institute of Energy and Climate Research (IEK-6) , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany.,Institut für Kristallographie , RWTH Aachen University , 52066 Aachen , Germany
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Pace KA, Kocevski V, Karakalos SG, Morrison G, Besmann T, zur Loye HC. Na2(UO2)(BO3): An All-Uranium(V) Borate Synthesized under Mild Hydrothermal Conditions. Inorg Chem 2018; 57:4244-4247. [DOI: 10.1021/acs.inorgchem.8b00487] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang Y, Duan T, Weng Z, Ling J, Yin X, Chen L, Sheng D, Diwu J, Chai Z, Liu N, Wang S. Mild Periodic Acid Flux and Hydrothermal Methods for the Synthesis of Crystalline f-Element-Bearing Iodate Compounds. Inorg Chem 2017; 56:13041-13050. [DOI: 10.1021/acs.inorgchem.7b01855] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yaxing Wang
- Key Laboratory of
Radiation Physics and Technology, Ministry of Education, Institute
of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Tao Duan
- School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Zhehui Weng
- Department of Chemical Science & Technology, Kunming University, Kunming 650214, China
| | - Jie Ling
- Department of Chemistry, Claflin University, Orangeburg, South Carolina 29146, United States
| | - Xuemiao Yin
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Lanhua Chen
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Daopeng Sheng
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Juan Diwu
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Zhifang Chai
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
| | - Ning Liu
- Key Laboratory of
Radiation Physics and Technology, Ministry of Education, Institute
of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
| | - Shuao Wang
- School for Radiological and Interdisciplinary Sciences
and Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou 215123, China
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Zhao D, Ma FX, Fan YC, Zhang L, Zhang RJ, Duan PG. PbLnB7O13 (Ln = Tb or Eu): a new type of layered polyborate with multi-colour light emission properties. Dalton Trans 2017. [DOI: 10.1039/c7dt01558e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work demonstrates two new polyborates PbLnB7O13 (Ln = Tb or Eu) with layer structures. Under near-UV light excitation, their solid solutions, PbTb1−xEuxB7O13 (x = 0–1), show a continuously changing emission color from green to red as the x value changes.
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Affiliation(s)
- Dan Zhao
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Fa-Xue Ma
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Yun-Chang Fan
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Lei Zhang
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Rui-Juan Zhang
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Pei-Gao Duan
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
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