Cis -trans isomerism modulates the magnetic relaxation of dysprosium single-molecule magnets

Chemical Science
Jianfeng WuBoris Le Guennic

Abstract

Geometry and magnetic relaxation modulations in a series of mononuclear dysprosium complexes, [DyLz2(o-vanilin)2]·X·solvent (Lz = 6-pyridin-2-yl-[1,3,5]triazine-2,4-diamine; X = Br- (1), NO3- (2), CF3SO3- (3)), were realized by changing the nature of the counter-anion. The DyIII ions in all complexes are eight-coordinate and in approximate D4d symmetry environments. The magnetic relaxation and anisotropy of these complexes were systematically investigated, both experimentally and from ab initio calculations. All complexes exhibit excellent single-molecule magnetic behavior. Remarkably, magneto-structural studies show that the rotation of the coordinating plane of the square-antiprismatic environment in complex 2 induces a magnetic relaxation path through higher excited states, yielding a high anisotropy barrier of 615 K (696 K for a diluted sample). Additionally, obvious opening of the hysteresis loop is observed up to 7 K, which is the highest blocking temperature ever reported for dysprosium single-molecule magnets.

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Citations

Jan 23, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kun ZhangYao-Yu Wang
Apr 13, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kun ZhangYao-Yu Wang
May 3, 2019·Chemical Communications : Chem Comm·Angelos B CanajMark Murrie
Aug 2, 2019·Chemical Communications : Chem Comm·Sukhen BalaMing-Liang Tong
Oct 22, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Haipeng WuShengli Gao
Nov 2, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Shui YuFupei Liang
Nov 28, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jedrzej KobylarczykRobert Podgajny
Jan 11, 2020·Chemical Communications : Chem Comm·Angelos B CanajMark Murrie
Sep 10, 2020·Chemical Communications : Chem Comm·Angelos B CanajMark Murrie
Feb 28, 2017·Chemical Communications : Chem Comm·Xiao-Lei LiJinkui Tang
Mar 14, 2017·Chemical Communications : Chem Comm·Y KishiL Ouahab
Nov 25, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Yu HuoMing-Liang Tong
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Sep 7, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jingjing LuJinkui Tang
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Sep 2, 2017·Chemistry, an Asian Journal·Jingjing LuJinkui Tang
Dec 3, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Kun ZhangYao-Yu Wang
Oct 12, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Jian-Qiang HeWen Dong
Mar 7, 2020·Chemical Communications : Chem Comm·Jianfeng WuFranc Meyer
Oct 18, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Amit ChakrabortyVadapalli Chandrasekhar
Oct 21, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Ming KongYou Song
Dec 22, 2020·Chemical Communications : Chem Comm·Lewis R Thomas-HargreavesStephen T Liddle
Feb 9, 2021·Chemistry : a European Journal·Vijay S ParmarRichard E P Winpenny
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Jul 4, 2018·Inorganic Chemistry·Kun ZhangYao-Yu Wang
May 5, 2020·ACS Omega·Amit ChakrabortyVadapalli Chandrasekhar
Mar 22, 2018·Inorganic Chemistry·Mei-Jiao LiuHui-Zhong Kou

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Methods Mentioned

BETA
X-ray

Software Mentioned

SHELXTL
SO
97
RASSI
MOLCAS
ANISO

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