| O—P—O桥联锰-席夫碱配合物的合成、结构和磁性质 |
| O—P—O bridged MnⅢ-Schiff base complexes: Syntheses, structures, and magnetic properties |
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| 摘要: 采用溶液法合成了2例由O—P—O单元桥联的锰-席夫碱(SB)新型三核配合物，即[Mn3(salen)3(L)]ClO4·H2O (1)和[Mn3(salpn)3(L)]ClO4(2)，其中salen2-=N，N'-乙二胺缩双水杨醛，salpn2-=N，N'-丙二胺缩双水杨醛，H2L=(5-(乙氧基羰基)萘-1-基)膦酸。通过单晶X射线衍射、红外光谱、粉末X射线衍射对其进行了表征。配合物1和2是同构的，均是由膦酸酯配体中的O—P—O桥联3个[Mn (SB)]+构成一个三核结构单元[Mn3(SB)3(L)]+，一个无序的ClO4-作为平衡阴离子存在。这些[Mn3(SB)3(L)]+三聚体通过π-π相互作用和相邻的分子形成超分子一维波形链。配合物1和2的磁性研究表明，不对称结构中的3个Mn(Ⅲ)离子分别是2个高自旋和1个低自旋，而Mn(Ⅲ)离子之间主要存在反铁磁相互作用。 |
| 关键词: 锰-席夫碱 萘膦酸酯配体 晶体结构 磁性质 |
| 基金项目: 江苏省青蓝工程、宿迁学院科研平台(2021pt04)、宿迁学院西楚高层次人才和宿迁市重点实验室(No.M202109)基金资助。 |
| Abstract: Two new trinuclear complexes consisting of MnⅢ-Schiff base (SB) building block bridged by O—P—O units, namely [Mn3(salen)3(L)]ClO4·H2O (1) and [Mn3(salpn)3(L)]ClO4 (2), where salen2-=N,N′-(ethylene)bis(salicyli-deneiminato), salpn2-=N,N′-(propylene)bis(salicylideneiminato), H2L=5-(ethoxycarbonyl)-naphthalen-1-yl)phosphonic acid, were synthesized by using solvent evaporation and characterized by using single-crystal X-ray diffraction, IR, and powder X-ray diffraction. Complexes 1 and 2 are isostructural and show similar trinuclear [Mn3(SB)3(L)]+, in which O—P—O groups among the phosphonate ligand bridge three Mn(Ⅲ) ion centers, and an additional disordered ClO4- as a balance anion. These [Mn3(SB)3(L)]+ trimers are assembled by π-π interaction from the neighboring complexes, giving rise to a supramolecular 1D wave chain. Magnetic measurements of 1 and 2 indicate that the three Mn(Ⅲ) ions in the asymmetric structure are two with high spin and one with low spin, while dominant antiferromagnetic interactions are mediated between the Mn(Ⅲ) ions. |
| Keywords: MnⅢ-Schiff base naphthalene-phosphate ligand crystal structures magnetic properties |
| 投稿时间：2022-11-20 修订日期：2023-05-25 |
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| 徐艳,刘照文,崔磊.O—P—O桥联锰-席夫碱配合物的合成、结构和磁性质[J].无机化学学报,2023,39(8):1628-1636. |
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