An oxide-bridged Dy-ReV-Dy single-molecule magnet

Kasper Steen Pedersen; Jan Dreiser; Magnus Schau-Magnussen; Christian Aa Thuesen; Høgni Weihe; Jesper Bendix

doi:10.1016/j.poly.2012.08.022

An oxide-bridged Dy-Re^V-Dy single-molecule magnet

Kasper Steen Pedersen, Jan Dreiser, Magnus Schau-Magnussen, Christian Aa Thuesen, Høgni Weihe, Jesper Bendix

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The reaction of diamagnetic trans-[Re^V(O)₂(py)₄]NO₃ with [Ln(hfac)₃(H₂O)₂] (Ln = Dy, Y, Tb: hfac^- = 1,1,1,5,5,5-hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac)₃(H₂O)-Re(O)₂(py)₄-Ln(hfac)₃(NO₃)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ'') signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy³⁺ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.

Original language	English
Journal	Polyhedron
Volume	46
Issue number	1
Pages (from-to)	47-52
ISSN	0277-5387
DOIs	https://doi.org/10.1016/j.poly.2012.08.022
Publication status	Published - 2012
Externally published	Yes

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@article{481efa31fb3c47ddb748662b5f41305d,

title = "An oxide-bridged Dy-ReV-Dy single-molecule magnet",

abstract = "The reaction of diamagnetic trans-[ReV(O)2(py)4]NO3 with [Ln(hfac)3(H2O)2] (Ln = Dy, Y, Tb: hfac- = 1,1,1,5,5,5-hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac)3(H2O)-Re(O)2(py)4-Ln(hfac)3(NO3)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ'') signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy3+ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.",

author = "Pedersen, {Kasper Steen} and Jan Dreiser and Magnus Schau-Magnussen and Thuesen, {Christian Aa} and H{\o}gni Weihe and Jesper Bendix",

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T1 - An oxide-bridged Dy-ReV-Dy single-molecule magnet

AU - Pedersen, Kasper Steen

AU - Dreiser, Jan

AU - Schau-Magnussen, Magnus

AU - Thuesen, Christian Aa

AU - Weihe, Høgni

AU - Bendix, Jesper

PY - 2012

Y1 - 2012

N2 - The reaction of diamagnetic trans-[ReV(O)2(py)4]NO3 with [Ln(hfac)3(H2O)2] (Ln = Dy, Y, Tb: hfac- = 1,1,1,5,5,5-hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac)3(H2O)-Re(O)2(py)4-Ln(hfac)3(NO3)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ'') signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy3+ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.

AB - The reaction of diamagnetic trans-[ReV(O)2(py)4]NO3 with [Ln(hfac)3(H2O)2] (Ln = Dy, Y, Tb: hfac- = 1,1,1,5,5,5-hexafluoroacetylacetonate(1-)) in chloroform yields oxide-bridged, trinuclear [Ln(hfac)3(H2O)-Re(O)2(py)4-Ln(hfac)3(NO3)] (DyReDy, YReY, TbReTb). The series is isostructural to a fluoride-bridged {Dy-Cr-Dy} complex previously reported (Dreiser et al., Chem. Sci. 3 (2012) 1024) but, notably, DyReDy exhibits frequency-dependent out-of-phase ac susceptibility (χ'') signals at higher temperatures than the chromium analogue. Magnetic investigations of a solid solution of Dy3+ in YReY reveal the presence of a small Dy-Dy exchange interaction in DyReDy.

U2 - 10.1016/j.poly.2012.08.022

DO - 10.1016/j.poly.2012.08.022

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SN - 0277-5387

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EP - 52

JO - Polyhedron

JF - Polyhedron

IS - 1