Abstract

In this work, we report the preparation of a seven-coordinate Mn(II) complex derived from a pentadentate ligand and characterised by FTIR, mass spectra, and elemental analysis. The solid state structure of the complex is investigated by single crystal X-ray diffraction. The structure of the complex is solved in monoclinic unit cell and P2₁/c space group. Single crystal X-ray crystallographic data reveal that the complex crystallises as [Mn(L)(H₂O)Cl]Cl(H₂O). In the structure of the complex, each Mn(II) ion is seven-coordinated by five donor atoms from the ligand (N₃O₂ type), a chloride ion, and a water molecule. The ligand donor atoms form a pentagonal plane and two donors (chloride and a water molecule) are located at the axial positions resulting in the pentagonal bipyramidal geometry. The structure of the complex is stabilized by hydrogen bond contacts. The UV-Vis absorption and emission properties of the complex are also investigated in solution.

中文翻译：

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七配位 Mn(II) 络合物的晶体结构和光物理性质

摘要

在这项工作中，我们报告了从五齿配体衍生的七配位 Mn(II) 配合物的制备，并通过 FTIR、质谱和元素分析进行​​表征。通过单晶 X 射线衍射研究了配合物的固态结构。该配合物的结构在单斜晶胞和P 2 ₁ / c空间群中求解。单晶 X 射线晶体学数据表明，复合物结晶为 [Mn(L)(H ₂ O)Cl]Cl(H ₂ O)。在配合物的结构中，每个 Mn(II) 离子由来自配体 (N ₃ O ₂类型）、一个氯离子和一个水分子。配体供体原子形成五边形平面，两个供体（氯化物和水分子）位于轴向位置，导致五边形双锥几何。配合物的结构通过氢键接触而稳定。还在溶液中研究了复合物的 UV-Vis 吸收和发射特性。