Field-induced slow magnetic relaxation in a six-coordinate mononuclear cobalt(II) complex with a positive anisotropy

Julia Vallejo; Isabel Castro; Rafael Ruiz-García; Joan Cano; Miguel Julve; Francesc Lloret; Giovanni De Munno; Wolfgang Wernsdorfer; Emilio Pardo

doi:10.1021/ja3075314

Field-induced slow magnetic relaxation in a six-coordinate mononuclear cobalt(II) complex with a positive anisotropy

J Am Chem Soc. 2012 Sep 26;134(38):15704-7. doi: 10.1021/ja3075314. Epub 2012 Sep 14.

Authors

Julia Vallejo¹, Isabel Castro, Rafael Ruiz-García, Joan Cano, Miguel Julve, Francesc Lloret, Giovanni De Munno, Wolfgang Wernsdorfer, Emilio Pardo

Affiliation

¹ Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain.

PMID: 22963111
DOI: 10.1021/ja3075314

Abstract

The novel mononuclear Co(II) complex cis-[Co(II)(dmphen)(2)(NCS)(2)]·0.25EtOH (1) (dmphen = 2,9-dimethyl-1,10-phenanthroline) features a highly rhombically distorted octahedral environment that is responsible for the strong positive axial and rhombic magnetic anisotropy of the high-spin Co(II) ion (D = +98 cm(-1) and E = +8.4 cm(-1)). Slow magnetic relaxation effects were observed for 1 in the presence of a dc magnetic field, constituting the first example of field-induced single-molecule magnet behavior in a mononuclear six-coordinate Co(II) complex with a transverse anisotropy energy barrier.