Cristóvão Beata, Osypiuk Dariusz, Bartyzel Agata
Department of General and Coordination Chemistry and Crystallography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Maria Curie-Sklodowska Sq. 2, 20-031 Lublin, Poland.
Materials (Basel). 2022 Jun 17;15(12):4299. doi: 10.3390/ma15124299.
New heterotrinuclear complexes with the general formula [CuLn(HL)(HL)(NO)]·MeOH (Ln = Ho (), Er (), = ,'-bis(2,3-dihydroxybenzylidene)-1,3-diaminopropane) were synthesized using compartmental Schiff base ligand in conjugation with auxiliary ligands. The compounds were characterized by elemental analysis, ATR-FTIR spectroscopy, X-ray diffraction, TG, DSC, TG-FTIR and XRD analysis. The NO salen-type ligand coordinates 3 and 4 metal centers via azomethine nitrogen and phenoxo oxygen atoms, respectively, to form heteropolynuclear complexes having CuOLn cores. In the crystals and , two terminal Cu(II) ions are penta-coordinated with a distorted square-pyramidal geometry and a Ln ion with trigonal dodecahedral geometry is coordinated by eight oxygen atoms from [Cu(HL)(NO)] and [Cu(HL)(NO)] units. Compounds and are stable at room temperature. During heating, they decompose in a similar way. In the first decomposition step, they lose solvent molecules. The exothermic decomposition of ligands is connected with emission large amounts of gaseous products e.g., water, nitric oxides, carbon dioxide, carbon monoxide. The final solid products of decomposition and in air are mixtures of CuO and HoO/ErO. The measurements of magnetic susceptibilities and field dependent magnetization indicate the ferromagnetic interaction between Cu and Ho ions .
合成了通式为[CuLn(HL)(HL)(NO)]·MeOH（Ln = Ho（），Er（）， = ，'-双(2,3-二羟基苄叉基)-1,3-二氨基丙烷）的新型异三核配合物，该配合物使用分隔型席夫碱配体与辅助配体共轭而成。通过元素分析、ATR-FTIR光谱、X射线衍射、TG、DSC、TG-FTIR和XRD分析对化合物进行了表征。NO萨伦型配体分别通过甲亚胺氮原子和酚氧原子与3个和4个金属中心配位，形成具有CuOLn核的异多核配合物。在晶体 和 中，两个末端Cu(II)离子以扭曲的四方锥几何构型五配位，一个具有三角十二面体几何构型的Ln离子由来自[Cu(HL)(NO)]和[Cu(HL)(NO)]单元的八个氧原子配位。化合物 和 在室温下稳定。加热时，它们以类似的方式分解。在第一步分解中，它们失去溶剂分子。配体的放热分解伴随着大量气态产物的释放，例如水、一氧化氮、二氧化碳、一氧化碳。在空气中分解 和 的最终固体产物是CuO和HoO/ErO的混合物。磁化率和场依赖磁化强度的测量表明Cu和Ho离子之间存在铁磁相互作用 。
