Lemes Maykon A, Magnan François, Gabidullin Bulat, Brusso Jaclyn
Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
Dalton Trans. 2018 Mar 26;47(13):4678-4684. doi: 10.1039/c8dt00324f.
A hexaazatrinaphtylene-based transition metal complex that exhibits single molecule magnet (SMM) behaviour is reported herein. Both monometallic (1) and bimetallic (2) CoII complexes with distorted octahedral geometries could be obtained through a straightforward change in synthetic conditions. Field induced SMM behaviour was exhibited by 1, with a D value of -60 cm-1 and Ueff = 17 K originating from the unquenched orbital angular momentum of the octahedral CoII (d7) centre. On the other hand, 2 exhibits weak antiferromagnetic interactions with a positive D value, thus preventing the observation of SMM behaviour. This investigation reveals the influence of both nuclearity and topology on the magnetic properties of HATN based complexes.
本文报道了一种基于六氮杂三亚苯的过渡金属配合物，其表现出单分子磁体（SMM）行为。通过合成条件的直接改变，可以得到具有扭曲八面体几何结构的单金属（1）和双金属（2）钴（II）配合物。1表现出场诱导的SMM行为，其D值为-60 cm-1，Ueff = 17 K，源于八面体钴（II）（d7）中心未淬灭的轨道角动量。另一方面，2表现出具有正D值的弱反铁磁相互作用，从而无法观察到SMM行为。该研究揭示了核数和拓扑结构对基于六氮杂三亚苯的配合物磁性能的影响。
