Field-Induced Slow Magnetic Relaxation of a Six-Coordinate Mononuclear Manganese(II) and Cobalt(II) Oxamate Complexes
Tamyris T. da Cunha, Vitor M. M. Barbosa, Willian X. C. Oliveira, Emerson F. Pedroso, Diana M. A. García, Wallace C. Nunes, Cynthia L. M. Pereira
Abstract
Two air-stable, isostructural, mononuclear six-coordinate manganese(II) and cobalt(II) oxamate complexes, [M(4-HOpa)2(H2O)2] [4-HOpa = N-4-hydroxyphenyloxamate; M= Mn2+ (1) or Co2+ (2)], exhibit field-induced slow magnetic relaxation. A bottleneck process is observed throughout the temperature range of 2–20 K for 1, while for 2, it dominates only at low temperatures (2–4 K). Additionally, the Raman process [n = 6.9(2)] is responsible for an increase in the relaxation time at higher temperatures to 2.
Topics & Concepts
ChemistryManganeseCobaltIsostructuralMagnetic relaxationRaman spectroscopyRelaxation (psychology)CrystallographyMagnetic fieldAnalytical Chemistry (journal)Inorganic chemistryMagnetizationCrystal structureOpticsOrganic chemistryPhysicsSocial psychologyPsychologyQuantum mechanicsMagnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms