Five mononuclear pentacoordinate Co(II) complexes with field-induced slow magnetic relaxation. (18th April 2017)

• Record Type: Journal Article
• Authors: Rajnák, Cyril; Titiš, Ján; Miklovič, Jozef; Kostakis, George E.; Fuhr, Olaf; Ruben, Mario; Boča, Roman
• Is Part Of: Polyhedron. Volume 126(2017)
• Page Start: 174
• Page End: 183
• Publication Date: 2017-04-18
• Subjects: Crystal structure -- Magnetic data -- Co(II) complexes -- Field-induced slow magnetic relaxation -- Pentacoordination; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2017.01.028
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Five related mononuclear pentacoordinate complexes of the formula [CoL 3 Cl2 ] show slow magnetic relaxation under small applied DC field; L 3 – a tridentate N-donor ligand based upon dipyrazolpyridine with an alkyl tail. All of them exhibit a supramolecular assembly, either forming dimers or chains via π–π stacking. Moreover, they display two relaxation branches, one being typical for single molecule magnets of this class, τ ∼ 10 −6 s, and the second one as slow as τ ∼ 0.5 s at T = 1.9 K. Abstract: Five related mononuclear pentacoordinate complexes of the formula [CoL 3 Cl2 ] show slow magnetic relaxation under small applied DC field; L 3 – a tridentate N-donor ligand based upon dipyrazolpyridine with an alkyl tail. All of them exhibit a supramolecular assembly, either forming dimers or chains via π–π stacking. Moreover, they display two relaxation branches, one being typical for single molecule magnets of this class, τ ∼ 10 −6 s, and the second one as slow as τ ∼ 0.5 s at T = 1.9 K.