Single-molecule magnets featuring a single magnetic center can show large spin reversal barriers due to large magnetic anisotropy. Through the use of high symmetry and weak ligand fields, mononuclear transition metal complexes can show significantly larger magnetic anisotropy than their multinuclear counterparts. In 2013 a linear iron(I) species was shown to have the largest spin reversal barrier for any transition metal single-molecule magnet. Additionally, the linear coordination environment led to the rare case where a transition metal complex was shown to have unquenched orbital angular momentum. In this presentation we will present results of our work on new two-coordinate transition metal complexes, with an emphasis on iron(I) and cobalt(II) complexes. As was seen for the original iron(I) species, these two-coordinate complexes exhibit very large magnetic anisotropy. We will show, however, that despite having a similarly large spin reversal barrier, secondary interactions lead to faster magnetic relaxation at low temperatures.

Magnetism of two-coordinate transition metal complexes

251st National Meeting (2016)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.