We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Tuning Magnetic Anisotropy in a Class of Co(II) Bis(hexafluoroacetylacetonate) Complexes.
- Authors
Huang, Xing‐Cai; Li, Jia‐Xin; Chen, Yong‐Zhi; Wang, Wen‐Yan; Xu, Rui; Tao, Jin‐Xia; Shao, Dong; Zhang, Yi‐Quan
- Abstract
Tuning the magnetic anisotropy of metal ions remains highly interesting in the design of improved single‐molecule magnets (SMMs). We herein report synthetic, structural, magnetic, and computational studies of four mononuclear CoII complexes, namely [Co(hfac)2(MeCN)2] (1), [Co(hfac)2(Spy)2] (2), [Co(hfac)2(MBIm)2] (3), and [Co(hfac)2(DMF)2] (4) (MeCN=acetonitrile, hfac=hexafluoroacetylacetone, Spy=4‐styrylpyridine, MbIm=5,6‐dimethylbenzimidazole, DMF=N,N‐dimethylformamide), with distorted octahedral geometry constructed from hexafluoroacetylacetone (hfac) and various axial ligands. By a building block approach, complexes 2–4 were synthesized by recrystallization of the starting material of 1 from various ligands containing solution. Magnetic and theoretical studies reveal that 1–4 possess large positive D values and relative small E parameters, indicating easy‐plane magnetic anisotropy with significant rhombic anisotropy in 1–4. Dynamic alternative current (ac) magnetic susceptibility measurements indicate that these complexes exhibit slow magnetic relaxation under external fields, suggesting field‐induced single‐ion magnets (SIMs) of 1–4. These results provide a promising platform to achieve fine tuning of magnetic anisotropy through varying the axial ligands based on Co(II) bis(hexafluoroacetylacetonate) complexes.
- Subjects
MAGNETIC anisotropy; MAGNETIC measurements; MAGNETIC susceptibility; MAGNETIC relaxation; DIMETHYLFORMAMIDE; METAL ions; ANISOTROPY
- Publication
Chemistry - An Asian Journal, 2020, Vol 15, Issue 9, p1469
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.201901625