Synthesis and Structure of a Two-Dimensional Metal-Organic Framework: [Fe(C₇H₃NO₄)(H₂O)₂]_n

Abstract:

A two-dimensional coordination polymer [Fe (C₇H₃NO₄)(H₂O)₂]_n was prepared with pyridine-2,3,5-tricarboxylic acid (H₃pta) and iron (II) perchlorate at hydrothermal condition. Pyridine-2,3,5-tricarboxylic acid was decomposed to form the organic ligand of pyridine-3,5-dicarboxylate anion appeared in 1. Its crystal structure was determined by single crystal X-ray diffraction. The complex belongs to monoclinic crystal system, C2/c space group with a = 0.9945(2) nm, b = 1.2067(3) nm, c = 0.74125(15) nm, α = γ = 90°, β = 105.859(3)°, V = 0.8557(3) nm³, Z = 4, D =1.995 Mg/ m³. The Fe (II) ion is five-coordinated by one nitrogen atom and four oxygen atoms. Furthermore, each Fe (II) ion bond with two other oxygen atoms on carboxyl groups by weak coordination action. The five coordination atoms form a distorted trigonal bipyramid coordination geometry. These coordination geometries are interlinked into a 2D alveolate net structure. The 2D layers are further connected into a 3D coordination polymer by hydrogen bonds.

• Periodical: Advanced Materials Research (Volume 790)
• Pages: 33-36
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.790.33
• Online since: September 2013
• Authors: Hong Sheng Wang, Hai Feng Suo
• Keywords: 3,5-Pyridinedicarboxylic Acid, Coordination Polymer, Crystal Structure, Iron

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