Antiferromagnetic interactions in melamine-bridged trinuclear cobalt complex

The hydrothermal assembly of Co(OAc)2 · 4H2O with isophthalatic acid (H2ip) and melamine (ma) yielded a novel 3D coordination polymeric complex, {[Co3(ma)(ip)3] · 2H2O}n (1), which presents an unusual non-interpenetrated pseudo-primitive cubic (pcu) topology constructed from a 6-connected trinuclear Co(II) SBU. The study of magnetic properties indicates that antiferromagnetic coupling interactions exist both between the adjacent Co(II) sites and between the adjacent trimers. So the melamine molecule participates in transferring magnetic interactions for the first time.

A new cobalt trimer complex, [Co3(ma)(ip)3] · 2H2O, has been synthesized hydrothermally and structurally characterized, which exhibits an interesting non-interpenetrated pseudo-pcu metal-organic 3D architecture constructed from a 6-connected SBU. The study of magnetic properties indicated that dominant antiferromagnetic coupling interactions exist between the adjacent Co(II) sites and between the adjacent trimers. And melamine molecule participates in transferring magnetic interactions for the first time.Figure optionsDownload as PowerPoint slide