Citation: Yan XU, Zhao-Wen LIU, Lei CUI. O—P—O bridged Mn^Ⅲ-Schiff base complexes: Syntheses, structures, and magnetic properties[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(8): 1628-1636. doi: 10.11862/CJIC.2023.126 shu

O—P—O bridged Mn^Ⅲ-Schiff base complexes: Syntheses, structures, and magnetic properties

Department of Materials Engineering, Suqian University, Suqian, Jiangsu 223800, China

Corresponding author: Yan XU, xuyan0511@126.com Lei CUI, 16077@squ.edu.cn
Received Date: 20 November 2022
Revised Date: 25 May 2023

Figures(7)

Two new trinuclear complexes consisting of Mn^Ⅲ-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 salen^2-=N, N′-(ethylene)bis(salicylideneiminato), salpn^2-=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.
- Mn^Ⅲ-Schiff base,
- naphthalene-phosphate ligand,
- crystal structures,
- magnetic properties
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O—P—O bridged MnⅢ-Schiff base complexes: Syntheses, structures, and magnetic properties

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O—P—O bridged Mn^Ⅲ-Schiff base complexes: Syntheses, structures, and magnetic properties