Inspiration from old molecules: field-induced slow magnetic relaxation in three air-stable tetrahedral cobalt(II) compounds.
نویسندگان
چکیده
We have investigated the dynamics of the magnetization of three four-coordinate mononuclear cobalt(II) compounds, which are synthesized conveniently and are air stable. Slow magnetic relaxation effects were observed for the compounds in the presence of a dc magnetic field.
منابع مشابه
Field-induced slow magnetic relaxation in cobalt(II) compounds with pentagonal bipyramid geometry.
Field-induced slow magnetic relaxation was observed for air-stable mononuclear cobalt(II) compounds with pentagonal bipyramid geometry. These are the first examples of such behavior observed in the seven-coordinated mononuclear 3d metal compounds.
متن کاملSyntheses, crystal structures and magnetic properties of three novel cobalt(II) complexes containing imidazole derivative groups.
Three Co(II) complexes with the formulas: {[Co2(Bib)3Cl2]Cl(CH3COO)}.CH3OH.H2O (1), [Co2(Bib)3Cl2]Cl2.(CH3OH)2.H2O, (2) and [Co3K1(Tib)2(CH3COO)6]PF6 (3), were obtained by self-assembly of a cobalt(II) salt with Bib and Tib (Bib = 1,3-bis(4,5-dihydro-1H-imidazol-2-yl)benzene; Tib = 1,3,5-tris(4,5-dihydro-1H-imidazol-2-yl)benzene) and were structurally and magnetically characterized. X-Ray singl...
متن کاملField-induced slow relaxation of magnetization in a tetrahedral Co(II) complex with easy plane anisotropy.
The mononuclear Co(II) complex CoBr (dmph = 2,9-dimethyl-1,10-phenanthroline) was obtained and X-ray structurally characterized as a distorted tetrahedron environment that is responsible for the moderately strong positive anisotropy of high spin Co(II). In combination with variable-field magnetic susceptibility data at low temperature, high-field electron paramagnetic resonance (HF-EPR) spectro...
متن کاملSlow magnetic relaxation in a pseudotetrahedral cobalt(II) complex with easy-plane anisotropy.
A pseudotetrahedral cobalt(II) complex with a positive axial zero-field splitting parameter of D = 12.7 cm(-1), as determined by high-field EPR spectroscopy, is shown to exhibit slow magnetic relaxation under an applied dc field.
متن کاملSlow Paramagnetic Relaxation of Some Pseudo-tetrahedral Ferrous Compounds in Zero Field
Slow (zero field)paramagnetic relaxation is reported for undiluted tetrahedral ferrous monomers for the first time. The Mossbauer spectra of Fe(2,9 di-CH3-phenanthroline)(NCS)2 and Fe(2,9 di-CH3 4,7 di-(j>-phenanthroline) (NCS)2 exhibit magnetic hyperfine splitting in the range 20 K to 1.6 K while the corresponding chlorides are rapidly relaxing paramagnets at all temperatures in zero field. Lo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemical communications
دوره 49 46 شماره
صفحات -
تاریخ انتشار 2013