Magnetic circular dichroism spectroscopy on the Cr-8 antiferromagnetic   ring

Joris van Slageren; Stergios Piligkos; Frank Neese

doi:10.1039/b925028j

Magnetic circular dichroism spectroscopy on the Cr-8 antiferromagnetic ring

Joris van Slageren, Stergios Piligkos, Frank Neese

Department of Chemistry

16 Citations (Scopus)

Abstract

A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr₈F₈Piv₁₆] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be d_Cr = -0.33 ± 0.02 cm^-1, e _Cr = 0.11 ± 0.01 cm^-1. Analysis of the MCD intensity as a function of field and temperature revealed the influence of spin mixing effects and yielded independent estimates of the single ion anisotropies (d_Cr = -0.19 cm^-1, e_Cr = 4.3 × 10 ^-4 cm^-1), as well as yielding the isotropic exchange interaction strength (J = -6.00 cm^-1). Thus it is shown that MCD is a powerful method to unravel the relation between single-ion and cluster anisotropy, furthering the design of molecular magnets with desired properties.

Original language	English
Journal	Dalton Transactions (Print Edition)
Volume	39
Issue number	20
Pages (from-to)	4999-5004
ISSN	1477-9226
DOIs	https://doi.org/10.1039/b925028j
Publication status	Published - 2010

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@article{775856a0828a11df928f000ea68e967b,

title = "Magnetic circular dichroism spectroscopy on the Cr-8 antiferromagnetic ring",

abstract = "A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr8F8Piv16] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be dCr = -0.33 ± 0.02 cm-1, e Cr = 0.11 ± 0.01 cm-1. Analysis of the MCD intensity as a function of field and temperature revealed the influence of spin mixing effects and yielded independent estimates of the single ion anisotropies (dCr = -0.19 cm-1, eCr = 4.3 × 10 -4 cm-1), as well as yielding the isotropic exchange interaction strength (J = -6.00 cm-1). Thus it is shown that MCD is a powerful method to unravel the relation between single-ion and cluster anisotropy, furthering the design of molecular magnets with desired properties.",

author = "{van Slageren}, Joris and Stergios Piligkos and Frank Neese",

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doi = "10.1039/b925028j",

language = "English",

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TY - JOUR

T1 - Magnetic circular dichroism spectroscopy on the Cr-8 antiferromagnetic ring

AU - van Slageren, Joris

AU - Piligkos, Stergios

AU - Neese, Frank

PY - 2010

Y1 - 2010

N2 - A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr8F8Piv16] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be dCr = -0.33 ± 0.02 cm-1, e Cr = 0.11 ± 0.01 cm-1. Analysis of the MCD intensity as a function of field and temperature revealed the influence of spin mixing effects and yielded independent estimates of the single ion anisotropies (dCr = -0.19 cm-1, eCr = 4.3 × 10 -4 cm-1), as well as yielding the isotropic exchange interaction strength (J = -6.00 cm-1). Thus it is shown that MCD is a powerful method to unravel the relation between single-ion and cluster anisotropy, furthering the design of molecular magnets with desired properties.

AB - A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr8F8Piv16] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be dCr = -0.33 ± 0.02 cm-1, e Cr = 0.11 ± 0.01 cm-1. Analysis of the MCD intensity as a function of field and temperature revealed the influence of spin mixing effects and yielded independent estimates of the single ion anisotropies (dCr = -0.19 cm-1, eCr = 4.3 × 10 -4 cm-1), as well as yielding the isotropic exchange interaction strength (J = -6.00 cm-1). Thus it is shown that MCD is a powerful method to unravel the relation between single-ion and cluster anisotropy, furthering the design of molecular magnets with desired properties.

U2 - 10.1039/b925028j

DO - 10.1039/b925028j

M3 - Journal article

SN - 1477-9226

VL - 39

SP - 4999

EP - 5004

JO - Dalton Transactions (Print Edition)

JF - Dalton Transactions (Print Edition)

IS - 20

ER -

Magnetic circular dichroism spectroscopy on the Cr-8 antiferromagnetic ring

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