Exchange coupling and its chemical trend studied by high-frequency epr on heterometallic [Ln2Ni] complexes

Atsushi Okazawa; Takashi Shimada; Norimichi Kojima; Shunsuke Yoshii; Hiroyuki Nojiri; Takayuki Ishida

doi:10.1021/ic402417h

Exchange coupling and its chemical trend studied by high-frequency epr on heterometallic [Ln₂Ni] complexes

Atsushi Okazawa, Takashi Shimada, Norimichi Kojima, Shunsuke Yoshii, Hiroyuki Nojiri, Takayuki Ishida^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We applied high-frequency electron paramagnetic resonance to trinuclear 4f-3d heterometallic complexes, [{Ln(hfac)₃}₂{Ni(dpk) ₂(py)₂}] (Ln = Y, Gd, Tb, and Ho; hfac = hexafluoroacetylacetonate, dpk = di-2-pyridyl ketoximate, and py = pyridine), and determined the exchange parameter J_Ln-Ni as well as nickel(II) zero-field splitting parameters. In contrast to the antiferromagnetic Dy analogue, ferromagnetic couplings were precisely characterized as J _Gd-Ni/k_B = +0.301(4) K, J_Tb-Ni/k_B = +0.216(12) K, and J_Ho-Ni/k_B = +0.110(3) K (defined as -J_Ln-NiΣJ_Ln^zS_Ni).

Original language	English
Pages (from-to)	13351-13355
Number of pages	5
Journal	Inorganic Chemistry
Volume	52
Issue number	23
DOIs	https://doi.org/10.1021/ic402417h
Publication status	Published - 2013 Dec 2
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "Exchange coupling and its chemical trend studied by high-frequency epr on heterometallic [Ln2Ni] complexes",

abstract = "We applied high-frequency electron paramagnetic resonance to trinuclear 4f-3d heterometallic complexes, [{Ln(hfac)3}2{Ni(dpk) 2(py)2}] (Ln = Y, Gd, Tb, and Ho; hfac = hexafluoroacetylacetonate, dpk = di-2-pyridyl ketoximate, and py = pyridine), and determined the exchange parameter JLn-Ni as well as nickel(II) zero-field splitting parameters. In contrast to the antiferromagnetic Dy analogue, ferromagnetic couplings were precisely characterized as J Gd-Ni/kB = +0.301(4) K, JTb-Ni/kB = +0.216(12) K, and JHo-Ni/kB = +0.110(3) K (defined as -JLn-NiΣJLnzSNi).",

author = "Atsushi Okazawa and Takashi Shimada and Norimichi Kojima and Shunsuke Yoshii and Hiroyuki Nojiri and Takayuki Ishida",

year = "2013",

month = dec,

day = "2",

doi = "10.1021/ic402417h",

language = "English",

volume = "52",

pages = "13351--13355",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "23",

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TY - JOUR

T1 - Exchange coupling and its chemical trend studied by high-frequency epr on heterometallic [Ln2Ni] complexes

AU - Okazawa, Atsushi

AU - Shimada, Takashi

AU - Kojima, Norimichi

AU - Yoshii, Shunsuke

AU - Nojiri, Hiroyuki

AU - Ishida, Takayuki

PY - 2013/12/2

Y1 - 2013/12/2

N2 - We applied high-frequency electron paramagnetic resonance to trinuclear 4f-3d heterometallic complexes, [{Ln(hfac)3}2{Ni(dpk) 2(py)2}] (Ln = Y, Gd, Tb, and Ho; hfac = hexafluoroacetylacetonate, dpk = di-2-pyridyl ketoximate, and py = pyridine), and determined the exchange parameter JLn-Ni as well as nickel(II) zero-field splitting parameters. In contrast to the antiferromagnetic Dy analogue, ferromagnetic couplings were precisely characterized as J Gd-Ni/kB = +0.301(4) K, JTb-Ni/kB = +0.216(12) K, and JHo-Ni/kB = +0.110(3) K (defined as -JLn-NiΣJLnzSNi).

AB - We applied high-frequency electron paramagnetic resonance to trinuclear 4f-3d heterometallic complexes, [{Ln(hfac)3}2{Ni(dpk) 2(py)2}] (Ln = Y, Gd, Tb, and Ho; hfac = hexafluoroacetylacetonate, dpk = di-2-pyridyl ketoximate, and py = pyridine), and determined the exchange parameter JLn-Ni as well as nickel(II) zero-field splitting parameters. In contrast to the antiferromagnetic Dy analogue, ferromagnetic couplings were precisely characterized as J Gd-Ni/kB = +0.301(4) K, JTb-Ni/kB = +0.216(12) K, and JHo-Ni/kB = +0.110(3) K (defined as -JLn-NiΣJLnzSNi).

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U2 - 10.1021/ic402417h

DO - 10.1021/ic402417h

M3 - Article

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VL - 52

SP - 13351

EP - 13355

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 23

ER -

Exchange coupling and its chemical trend studied by high-frequency epr on heterometallic [Ln₂Ni] complexes

Abstract

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