title: Magnetic study on a two-dimensional coordination polymer with mixed bridging ligands.
abstract: A two-dimensional coordination polymer, [Co(mu(1,3)-SCN)(2)(mu(1,6)-dmpzdo)](n)() (where dmpzdo = 2,5-dimethylpyrazine-1,4-dioxide), has been synthesized and its crystal structure determined by X-ray crystallography. In the complex, the adjacent Co(II) ions are coordinated by mu(1,3)-SCN(-) bridging ligands which forms a one-dimensional chain along the a axis; the one-dimensional chains are further connected by mu(1,6)-dmpzdo bridging ligands which leads to the formation of a two-dimensional layer on the ac plane. The theoretical calculations reveal that a ferromagnetic coupling exists between the mu(1,3)-SCN(-) bridging Co(II) ions and an anti-ferromagnetic interaction between the mu(1,6)-dmpzdo bridging Co(II) ions, and the anti-ferromagnetic interaction is stronger than the ferromagnetic interaction. The fitting of the variable-temperature (34-300 K) magnetic susceptibilities reveals that there is an anti-ferromagnetic coupling between the bridging Co(II) ions with the magnetic coupling constant J = -3.52 cm(-1).
authors.affiliation: Department of Chemistry, Shandong Normal University, Jinan 250014, People's Republic of China. shijingmin@beelink.com
authors.forename: Jing-Min
authors.initials: JM
authors.lastname: Shi
authors.forename: You-Min
authors.initials: YM
authors.lastname: Sun
authors.forename: Xia
authors.initials: X
authors.lastname: Zhang
authors.forename: Long
authors.initials: L
authors.lastname: Yi
authors.forename: Peng
authors.initials: P
authors.lastname: Cheng
authors.forename: Lian-Dong
authors.initials: LD
authors.lastname: Liu