Muto Masahiro, Morinaga Kousuke, Nishihashi Momoko, Yamada Yasunori, Koikawa Masayuki
Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Honjo 1, Saga 840-8502, Japan.
Molecules. 2024 Sep 11;29(18):4307. doi: 10.3390/molecules29184307.
Cyclic trinuclear homo-metal complexes, [{Fe(LBr)py}] () and [{Mn(LBr)}(py) MeOH] (), along with a hetero-metal complex, [FeMn(LH)(DMF)] (), were synthesized using asymmetric ditopic ligands (HLH: 2-(2-hydroxyphenyl)-6-ol-5-(salicylideneamino)benzoxazole, HLBr: 2-(2-hydrox-5-bromoyphenyl)-6-ol-5-(5-bromosalicylideneamino)benzoxazole). The molecular structure of is characterized by a tripod structure with three-fold symmetry, where an enantiomer pair forms a dimeric capsule with dimensions of approximately 3 × 1.6 × 1.6 nm. Complexes and , which lack three-fold symmetry, exhibit similar molecular structures to previously reported complexes with these ligands, but do not form a capsule structure. Magnetic measurements of - reveal the presence of significantly weak antiferromagnetic interactions between the metal ions.
使用不对称双齿配体（HLH：2-(2-羟基苯基)-6-羟基-5-(水杨基亚氨基)苯并恶唑，HLBr：2-(2-羟基-5-溴苯基)-6-羟基-5-(5-溴水杨基亚氨基)苯并恶唑）合成了环状三核同金属配合物[{Fe(LBr)py}] () 和[{Mn(LBr)}(py) MeOH] ()，以及异金属配合物[FeMn(LH)(DMF)] ()。 的分子结构以具有三重对称性的三脚架结构为特征，其中一对对映体形成尺寸约为3×1.6×1.6 nm的二聚体胶囊。缺乏三重对称性的配合物 和 表现出与先前报道的具有这些配体的配合物相似的分子结构，但不形成胶囊结构。对 的磁性测量揭示了金属离子之间存在明显较弱的反铁磁相互作用。
