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Magnetochemistry
Volume 5
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10.3390/magnetochemistry5020030
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Article

Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation †

by
Ryuta Ishikawa
1,*,
Shoichi Michiwaki
1,
Takeshi Noda
1,
Keiichi Katoh
2,
Masahiro Yamashita
2,3,4 and
Satoshi Kawata
1
1
Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
2
Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
3
Advanced Institute for Materials Research (AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
4
School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
*
Author to whom correspondence should be addressed.
†
This manuscript is dedicated to Professor Masahiro Yamashita on the occasion of his 65th birthday for his contributions to the multifunctional nanosciences of advanced coordination compounds.
Magnetochemistry 2019, 5(2), 30; https://doi.org/10.3390/magnetochemistry5020030
Submission received: 26 March 2019 / Revised: 11 April 2019 / Accepted: 18 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue A Themed Issue of Functional Molecule-based Magnets: Dedicated to Professor Masahiro Yamashita on the Occasion of his 65th Birthday)
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Abstract

A series of chloralilate-bridged dinuclear lanthanide complexes of formula [{LnIII(Tp)2}2(μ-Cl2An)]·2CH2Cl2, where Cl2An2− and Tp− represent the chloranilate and hydrotris (pyrazolyl)borate ligands, respectively, and Ln = Gd (1), Tb (2), Ho (3), Er (4), and Yb (5) was synthesized. All five complexes were characterized by an elemental analysis, infrared spectroscopy, single crystal X-ray diffraction, and SQUID measurements. The complexes 1–5 in the series were all isostructural. A comparison of the temperature dependence of the dc magnetic susceptibility data of these complexes revealed clear differences depending on the lanthanide center. Ac magnetic susceptibility measurements revealed that none of the five complexes exhibited a slow magnetic relaxation under a zero applied dc field. On the other hand, the Kramers systems (complexes 4 and 5) clearly displayed a slow magnetic relaxation under applied dc fields, suggesting field-induced single-molecule magnets that occur through Orbach and Raman relaxation processes.
Keywords: lanthanide ions; slow magnetic relaxation; single-molecule magnets lanthanide ions; slow magnetic relaxation; single-molecule magnets
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MDPI and ACS Style

Ishikawa, R.; Michiwaki, S.; Noda, T.; Katoh, K.; Yamashita, M.; Kawata, S. Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation. Magnetochemistry 2019, 5, 30. https://doi.org/10.3390/magnetochemistry5020030

AMA Style

Ishikawa R, Michiwaki S, Noda T, Katoh K, Yamashita M, Kawata S. Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation. Magnetochemistry. 2019; 5(2):30. https://doi.org/10.3390/magnetochemistry5020030

Chicago/Turabian Style

Ishikawa, Ryuta, Shoichi Michiwaki, Takeshi Noda, Keiichi Katoh, Masahiro Yamashita, and Satoshi Kawata. 2019. "Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation" Magnetochemistry 5, no. 2: 30. https://doi.org/10.3390/magnetochemistry5020030

APA Style

Ishikawa, R., Michiwaki, S., Noda, T., Katoh, K., Yamashita, M., & Kawata, S. (2019). Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation. Magnetochemistry, 5(2), 30. https://doi.org/10.3390/magnetochemistry5020030

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