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Chinese Journal of Structural Chemistry. 2018, (02)

Synthesis, Structure, Photoluminescence and Thermal Expansion of a Rare Earth Formate Oxalate FrameworkEnglish Full Text

Hadi Abdul Nada;LI Wei;FENG Guo-Qiang;LU Pei-Xiang;School of Physics, Huazhong University of Science and Technology;Department of Physics, College of Education, University of Al-Qadisiya;Department of Physics and Mechanical ＆ Electrical Engineering, Hubei University of Education;

Abstract: A new lanthanide formate oxalate framework[Eu（C2O4）（HCOO）]n（1）has been synthesized via hydrothermal method and characterized by single-crystal X-ray diffraction（SC-XRD）.The framework crystallizes in the orthorhombic Pnma space group,with a=7.0984（4）,b=6.6442（3）,c=10.6793（6）?,V=503.68（4）?~3,Z=3,C3HO6Eu,Mr=285.00 g/mol,Dc=3.7581 g/cm~3,F（000）=520.3796,μ=12.413 mm-1,the final R=0.0264 and w R=0.0628 for 797observed reflections with I＞2σ（I）.The photoluminescence（PL）measurements reveal the significant red emission of the framework is dominated by the（~5D0→~7F2）electronic transition at614 nm.Further variable-temperature powder X-ray diffraction（VT-PXRD）indicates that framework 1 shows slight negative thermal expansion（NTE）along the a-axis,and positive thermal expansion（PTE）along the b and c axes.
Keywords：

formate oxalate framework; hydrothermal method; photoluminescence; thermal expansion;

  • DOI：

    10.14102/j.cnki.0254-5861.2011-1683

  • Series：

  • Subject：

  • Classification Code：

    O641.4

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