A Highly Stable 3D Porous Lanthanum Metal-organic Framework Constructed From A New Flexible Bis(benzoic acid) Ligand Produced in Situ

Authors

  • Dr. Yong-Hong Wen,

    Corresponding author
    1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
    • Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China, Fax: +86-53284022681
    Search for more papers by this author
  • Chong Jiang,

    1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
    Search for more papers by this author
  • Shi-Ying Wang,

    1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
    Search for more papers by this author
  • Dr. Lei Wang

    Corresponding author
    1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
    • Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
    Search for more papers by this author

Abstract

By employing diethyl 1,3-propylidenebis(4-oxybenzoate) as a precursor, the new three-dimensional metal-organic framework [La2L2(HL)2]n [L = 1,3-propylidenebis(4-oxybenzoate)] was prepared and characterized by single-crystal X-ray diffraction analysis, elemental analysis, infrared spectroscopy, and thermogravimetric analysis. The compound crystallizes in the triclinic space group Pequation image, with cell parameters: a = 8.299 (2) Å, b = 14.127 (3) Å, c = 14.520 (3) Å, α = 112.43 (3) °, β = 103.10 (3) °, γ = 95.28 (3)°, V = 1502.2 (5) Å3, and Z = 1. Under hydrothermal reaction conditions, two ester groups of the ligand hydrolyzed into carboxylate groups. The carboxylate groups coordinated in situ to metal ions to form the 3D coordination polymer. It exhibits a 10.4 × 10.6 Å rhombic channel along the [011] direction. On the basis of the results of TG analysis, the structure is thermally stable up to ≈ 400 °C.

Ancillary