Molecular-Capsule Assemblies and Systematic Control of Molecular-based Magnets Composed of Trinuclear Macrocyclic Complexes

以2-（水杨基氨基）苯酚为基料，通过三价金属源与修饰的五齿酸配体反应，得到了具有独特大环结构的新型三核金属配合物。这些配合物的整个分子结构被认为是具有3重旋转轴的三角锥体几何结构。在这些配合物的晶体填料中，两个手性对松散地聚集形成具有大腔（8 x 4 x 4 a）的荚膜构象。获得了两种新的包膜构象配合物，包括单核八面体金属配合物。这些配合物的磁测量表明，非常弱的反铁磁相互作用占主导地位。为了改善磁相互作用，制备了更简单的三角齿配体。得到的三核锰配合物具有三角锥体结构，具有较强的铁磁相互作用。认为所得的三核配合物可作为新型磁性材料加以应用。

New trinuclear metal complexes with unique macrocyclic structures have been obtained by the reaction of trivalent metal sources and modified pentadentate ligands based on 2-(salicylideneamino)phenol. The entire molecular structure of these complexes is regarded as a trigonal-pyramidal geometry with 3-fold rotation axis. In the crystal packing of these complexes, two chiral pairs are loosely aggregated to form capsular conformation with a large cavity (8 x 4 x 4 A).Two new complexes with capsular conformation including mononuclear octahedral metal complexes have been obtained. Magnetic measurements of these complexes indicate that very weak antiferromagnetic interactions are dominant. To improve the magnetic interactions, more simple terdentate ligands have been prepared. The obtained trinuclear Mn complexes with trigonal-pyramidal structure show strong ferromagnetic interactions. It is suggested the obtained trinuclear complexes can be applied as new magnetic materials.