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Updated: Oct 1, 2025
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Structure, magnetic properties and spin density of two alternative Mn(II) coordination polymers based on
Ai Wang1, Bin Yang1,2, Yan Wang3
1Key Laboratory of Materials for Energy Conversion and Storage, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, PR China. aiwang@sxu.edu.cn.
Abstract:
Two novel manganese coordination polymers [Mn2(μ2-bcpb)(μ4-bcpb)(2,2'-bipy)2] (1) and [Mn2(μ3-bcpb)2(2,2'-bipy)2(H2O)] (2) (H2bcpb = 1,4-bis(2'-carboxylato phenoxy)-benzene; 2,2'-bipy = 2,2'-bipyridine), have been synthesized successfully from the same reactants. This unusual selectivity was corroborated by X-ray powder diffraction. Single crystal X-ray diffraction analysis of complex 1 reveals that neighboring Mn(II) ions are linked via two bcpb2- anions to form a dinuclear Mn(II) subunit [Mn2(μ1,1-COO)2]2+ with a Mn⋯Mn distance of 3.3758 (6) Å. And π⋯π interactions between aromatic rings of the bcpb2- and 2,2'-bipy ligands stabilize the two-dimensional extended coordination network with the unprecedented Schläfli symbols {4·62}2{42·62·82}. In the [Mn2(μ1,3-COO)2]2+ subunit of 2, two linking bcpb2- ligands subtend an interaction distance of 4.4048(6) Å. Intermolecular O-H⋯O hydrogen bonds involving oxygen atoms of carboxylic acid and coordinated water molecules connect adjacent 1D chain molecules into a 2D network. Experimental temperature-dependent magnetic susceptibility measurements and spin density analyses by DFT disclose that compounds 1 and 2 display different magnetic properties.
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