Journal
INORGANIC CHEMISTRY
Volume 60, Issue 24, Pages 18990-19000Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c02828
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21201061]
- Open Research Fund Project of Beijing National Laboratory for Molecular Science [BNLMS201820]
- Open Research Fund Project of Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functiona l Molecules [KLSAOFM1914]
- Innovation Group Project of the Natural Science Foundation of Hubei Province [2017CFA006]
- Science and Technology Research Project of Education Commission of Hubei Province [D20211003]
Ask authors/readers for more resources
This study introduces a series of 3d-4f ion-pair compounds composed of Ln(III) cations and transition metallocyanate anions, which offer an opportunity to investigate the effects of 3d-4f and 4f-4f magnetic interactions on the behavior of site-resolved 4f SMMs.
Single-molecule magnets (SMMs) are expected to be promising candidates for the applications of high-density information storage materials and quantum information processing. Lanthanide SMMs have attracted considerable interest in recent years due to their excellent performance. It has always been interesting but not straightforward to study the relaxation and blocking mechanisms by embedding 3d ions into 4f SMMs. Here we report a family of air-stable 3d-4f ion-pair compounds, YFe (1), DyCr (2), DyFe (3), DyCo (4), and Dy0.04Y0.96Fe (5), composed of pentagonal bipyramidal (D-5h) Ln(III) cations and transition metallocyanate anions. The ion-pair nature makes the dipole-dipole interactions almost the only component of the magnetic interactions that can be clarified and analytically resolved under proper approximation. Therefore, this family provides an intuitive opportunity to investigate the effects of 3d-4f and 4f-4f magnetic interactions on the behavior of site-resolved 4f SMMs. Dynamic magnetic measurements of 1 under a 4 kOe external field reveal slow magnetic relaxation originating from the isolated [Fe-III](LS) (S = 1/2) ions. Under zero dc field, compounds 2-5 show similar magnetic relaxation processes coming from the separated pentagonal bipyramidal (D-5h) Dy-III ions with high Orbach barriers of 592(5), 596(4), 595(3), and 606(4) K, respectively. Comparatively, both compounds 3 and 5 exhibit two distinct relaxation processes, respectively from the [Fe-III](LS) and Dy-III [U-eff = 596(4) K for 3 and 610(7) K for 5] ions, under a 4 kOe dc field. The dipolar interactions between the neighboring TMIII (TM = transition metal, Cr-III or [Fe-III](LS)) and Dy-III ions were revealed to have little effect on the thermal relaxation in compounds 2, 3, and 5, or the coexistence of the two separate relaxation processes in compounds 3 and 5 under a 4 kOe dc field, but they significantly affect the quantum tunneling of magnetization and the magnetic hysteresis behavior of 2 and 3 at low temperatures compared to those of 4.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available