Structural diversity of Mn(II) and Cu(II) complexes based on 2-carboxyphenoxyacetate linker: Syntheses, conformation comparison and magnetic properties
| Autor: | Zhong-Xiang Du, Jun-Xia Li, Wen-Bei Bo, Feng Xun, Lin-Yuan Xiong, Lu-Lu Fu |
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| Rok vydání: | 2022 |
| Předmět: |
Ligand
Chemistry Metal ions in aqueous solution Crystal structure Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry Metal Crystallography Ferromagnetism Zigzag visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Chelation Physical and Theoretical Chemistry Linker |
| Zdroj: | Journal of Solid State Chemistry. 305:122636 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2021.122636 |
| Popis: | Four new binary complexes with 2-carboxyphenoxyacetic acid ligand (2-H2cpa), namely [Mn(2-cpa)(H2O)3] (0D-Mn), [Cu(2-cpa)(H2O)3] (0D-Cu), [Mn(2-cpa)(H2O)]n (1D-Mn) and [Cu(2-cpa)(H2O)]n (2D-Cu), have been successfully prepared and systematically characterized. Structure analyses indicated that 0D-Mn and 0D-Cu are isomorphous mononuclear species in which the 2-carboxyphenoxyacetate (2-cpa) is a tridentate chelate anionic ligand. 1D-Mn is a 1D zigzag chain structure formed by the tetradentate bridging chelate-μ2 coordination pattern of 2-cpa connecting adjacent MnII ions. While 2D-Cu is a 2D corrugated (4,4)-connected layer and 2-cpa adopts pentadentate double bridging chelate-μ3 coordination mode in it. The different synthetic conditions, crystal structures and conformation of 2-cpa in the above compounds have been carefully analyzed and the results revealed that the synthetic conditions and flexible conformation of 2-cpa may be responsible for the structural diversity of binary 2-cpa metal complex system. In addition, the magnetic measurements showed that between the neighbouring metal ions there are weak ferromagnetic exchange in 0D-Mn and 0D-Cu, but antiferromagnetic coupling in 1D-Mn and 2D-Cu, respectively. |
| Databáze: | OpenAIRE |
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