A tetracoordinate Co(II) single molecule magnet based on triphenylphosphine and isothiocyanato group. (28th May 2016)

• Record Type: Journal Article
• Authors: Rajnák, Cyril; Packová, Alena; Titiš, Ján; Miklovič, Jozef; Moncol', Ján; Boča, Roman
• Is Part Of: Polyhedron. Volume 110(2016)
• Page Start: 85
• Page End: 92
• Publication Date: 2016-05-28
• Subjects: Crystal structure -- Single molecule magnet -- AC susceptibility -- Cobalt(II) complex -- Zero-field splitting; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2016.02.026
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Mononuclear complex [Co(PPh3 )2 (NCS)2 ] possesses a sizable zero-field splitting D / hc = −9.4 cm −1 . It exhibits a slow magnetic relaxation with two relaxation branches: the low-frequency at f = 1–10 Hz and the high-frequency branch above f > 200 Hz. The characteristics of this field-induced single molecule magnet strongly depend upon the applied external field B DC = 0.2–0.4 T. Abstract: A simple Co(II) mononuclear complex [Co(PPh3 )2 (NCS)2 ] has been studied in details. Its crystal and molecular structure is reported along with its IR a UV–Vis spectra. The DC magnetization studies confirm a sizable zero-field splitting D / hc = −9.4 cm −1 that is also confirmed by quantum-chemical calculations. The AC susceptibility data shows that there is a slow magnetic relaxation with two relaxation branches. The low-frequency branch occurs at about f = 1–10 Hz and it tends to disappear progressively on heating. The high-frequency branch exists at the frequency ranges above f > 200 Hz and this is shifted above the hardware limit (1500 Hz) on heating. The characteristics of this field-induced single molecule magnet strongly depend upon the applied DC field (0.2–0.4 T).