A Highly Stable 3D Porous Lanthanum Metal‐organic Framework Constructed From A New Flexible Bis(benzoic acid) Ligand Produced in Situ |
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Authors: | Dr Yong‐Hong Wen Chong Jiang Shi‐Ying Wang Dr Lei Wang |
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Institution: | 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 |
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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 P , 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. |
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Keywords: | Lanthanum Metal‐organic frameworks X‐ray diffraction IR spectroscopy Bis‐benzoate ligands |
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