Sen Ji , Lei Kang , Yanyang Han , Shanshan Liu , Ye Liu , Xin Yang , Kai Feng
{"title":"A novel sodium manganese fluorooxalate crystal Na2Mn2(C2O4)2.5F·2H2O: Synthesis, structure, optical and thermal properties","authors":"Sen Ji , Lei Kang , Yanyang Han , Shanshan Liu , Ye Liu , Xin Yang , Kai Feng","doi":"10.1016/j.jssc.2024.125031","DOIUrl":null,"url":null,"abstract":"<div><div>A novel three-dimensional sodium manganese fluorooxalate, Na<sub>2</sub>Mn<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)<sub>2.5</sub>F·2H<sub>2</sub>O, has been obtained by an ionic-liquid-assisted solvothermal method. Na<sub>2</sub>Mn<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)<sub>2.5</sub>F·2H<sub>2</sub>O crystallizes in the triclinic <span><math><mrow><mi>P</mi><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> space group with unit cell parameters of <em>a</em> = 7.9129(4) Å, <em>b</em> = 8.8497(4) Å, <em>c</em> = 8.9252(5) Å, <em>α</em> = 74.623(4) <sup>o</sup>, <em>β</em> = 72.361(5) <sup>o</sup>, <em>γ</em> = 78.193(4) <sup>o</sup>, and Z = 2. The basic structural units are Mn1O<sub>6</sub>F and Mn2O<sub>5</sub>F polyhedra, which are linked by sharing C<sub>2</sub>O<sub>4</sub> groups and F atoms to build a three-dimensional framework <span><math><mrow><msup><mmultiscripts><mrow><mo>[</mo><mrow><msub><mtext>Mn</mtext><mn>4</mn></msub><msub><mrow><mo>(</mo><mrow><msub><mi>C</mi><mn>2</mn></msub><msub><mi>O</mi><mn>4</mn></msub></mrow><mo>)</mo></mrow><mn>5</mn></msub><msub><mi>F</mi><mn>2</mn></msub></mrow><mo>]</mo></mrow><mprescripts></mprescripts><mi>∞</mi><mn>3</mn></mmultiscripts><mrow><mn>4</mn><mo>−</mo></mrow></msup></mrow></math></span> with Na<sup>+</sup> and H<sub>2</sub>O occupying the pores. The band gap obtained by UV–Vis–NIR diffuse reflectance is 3.24 eV. In addition, Na<sub>2</sub>Mn<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)<sub>2.5</sub>F·2H<sub>2</sub>O delivers a moderate birefringence of <span><span>0.064@550</span><svg><path></path></svg></span> nm.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"340 ","pages":"Article 125031"},"PeriodicalIF":3.2000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022459624004857","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
A novel three-dimensional sodium manganese fluorooxalate, Na2Mn2(C2O4)2.5F·2H2O, has been obtained by an ionic-liquid-assisted solvothermal method. Na2Mn2(C2O4)2.5F·2H2O crystallizes in the triclinic space group with unit cell parameters of a = 7.9129(4) Å, b = 8.8497(4) Å, c = 8.9252(5) Å, α = 74.623(4) o, β = 72.361(5) o, γ = 78.193(4) o, and Z = 2. The basic structural units are Mn1O6F and Mn2O5F polyhedra, which are linked by sharing C2O4 groups and F atoms to build a three-dimensional framework with Na+ and H2O occupying the pores. The band gap obtained by UV–Vis–NIR diffuse reflectance is 3.24 eV. In addition, Na2Mn2(C2O4)2.5F·2H2O delivers a moderate birefringence of 0.064@550 nm.
期刊介绍：
Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.
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