TY - JOUR
T1 - Detailed Analysis of the Crystal Structures and Magnetic Properties of a Dysprosium(III) Phthalocyaninato Sextuple-Decker Complex
T2 - Weak f–f Interactions Suppress Magnetic Relaxation
AU - Horii, Yoji
AU - Katoh, Keiichi
AU - Sugimoto, Kunihisa
AU - Nakanishi, Ryo
AU - Breedlove, Brian K.
AU - Yamashita, Masahiro
N1 - Funding Information:
This work was supported financially by JSPS KAKENHI Grant Numbers JP20225003, JP15K05467, JP24750119, JP14J02656, Tohoku University Molecule & Material Synthesis Platform in Nanotechnology Platform Project, and CREST, JST (JPMJCR12L3), Japan, and 2015B Budding Researchers Support Proposals (SPring-8: 2015B1707). We thank Dr. Nobuhiro Yasuda (JASRA) for SXRD measurements at SPring-8. M. Yamashita thanks for support from the 111 Project (B18030) from China.
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/2/26
Y1 - 2019/2/26
N2 - In the research field of single-molecule magnets (SMMs), lanthanoid–lanthanoid interactions, so-called f–f interactions, are known to affect the SMM properties, although their magnitudes are small. In this article, an SMM with very weak f–f interactions is reported, and the effects of the interactions on the SMM properties are discussed. X-ray structural analysis of the Dy III -Cd II -phthalocyaninato sextuple-decker complex (Dy 2 Cd 3 ) reveals that the intramolecular Dy−Dy length in Dy 2 Cd 3 is more than 13 Å, which is longer than the intermolecular Dy−Dy length. Even though the two Dy III ions are far apart, intermolecular ferromagnetic dipole–dipole interactions are observed in Dy 2 Cd 3 . From detailed analysis of ac magnetic susceptibilities, quantum tunneling of the magnetization (QTM) in Dy 2 Cd 3 is partially suppressed owing to the existence of very weak Dy−Dy interactions. Our results show that even very weak Dy−Dy interactions act as a dipolar bias, suppressing QTM.
AB - In the research field of single-molecule magnets (SMMs), lanthanoid–lanthanoid interactions, so-called f–f interactions, are known to affect the SMM properties, although their magnitudes are small. In this article, an SMM with very weak f–f interactions is reported, and the effects of the interactions on the SMM properties are discussed. X-ray structural analysis of the Dy III -Cd II -phthalocyaninato sextuple-decker complex (Dy 2 Cd 3 ) reveals that the intramolecular Dy−Dy length in Dy 2 Cd 3 is more than 13 Å, which is longer than the intermolecular Dy−Dy length. Even though the two Dy III ions are far apart, intermolecular ferromagnetic dipole–dipole interactions are observed in Dy 2 Cd 3 . From detailed analysis of ac magnetic susceptibilities, quantum tunneling of the magnetization (QTM) in Dy 2 Cd 3 is partially suppressed owing to the existence of very weak Dy−Dy interactions. Our results show that even very weak Dy−Dy interactions act as a dipolar bias, suppressing QTM.
KW - crystal structures
KW - lanthanoid–lanthanoid interactions
KW - magnetic properties
KW - quantum chemistry
KW - single-molecule magnets
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U2 - 10.1002/chem.201805368
DO - 10.1002/chem.201805368
M3 - Article
C2 - 30600845
AN - SCOPUS:85061025868
VL - 25
SP - 3098
EP - 3104
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 12
ER -