Negative thermal expansion in LnCo(CN)6 (Ln=La, Pr, Sm, Ho, Lu, Y): Mechanisms and compositional trends

Samuel G. Duyker; Vanessa K. Peterson; Gordon J. Kearley; Anibal J. Ramirez-Cuesta; Cameron J. Kepert

doi:10.1002/anie.201300619

Negative thermal expansion in LnCo(CN)₆ (Ln=La, Pr, Sm, Ho, Lu, Y): Mechanisms and compositional trends

Samuel G. Duyker
, Vanessa K. Peterson
, Gordon J. Kearley
, Anibal J. Ramirez-Cuesta
, Cameron J. Kepert

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

101 Scopus citations

Abstract

RUM with a twist: The magnitude of negative thermal expansion (NTE) in the LnCo(CN)₆ coordination frameworks increases with Ln ion radius r _Ln. The framework structure contains an unusual locally unstable trigonal prismatic LnN₆ unit that participates in an NTE-contributing vibrational mode by twisting about its axis at low energies. This contrasts with the rigid unit modes (RUMs) prevalent in other systems.

Original language	English
Pages (from-to)	5266-5270
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	52
Issue number	20
DOIs	https://doi.org/10.1002/anie.201300619
State	Published - May 10 2013
Externally published	Yes

Keywords

coordination frameworks
inelastic neutron scattering
lanthanoids
metal cyanides
rigid unit mode

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10.1002/anie.201300619

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title = "Negative thermal expansion in LnCo(CN)6 (Ln=La, Pr, Sm, Ho, Lu, Y): Mechanisms and compositional trends",

abstract = "RUM with a twist: The magnitude of negative thermal expansion (NTE) in the LnCo(CN)6 coordination frameworks increases with Ln ion radius r Ln. The framework structure contains an unusual locally unstable trigonal prismatic LnN6 unit that participates in an NTE-contributing vibrational mode by twisting about its axis at low energies. This contrasts with the rigid unit modes (RUMs) prevalent in other systems.",

keywords = "coordination frameworks, inelastic neutron scattering, lanthanoids, metal cyanides, rigid unit mode",

author = "Duyker, \{Samuel G.\} and Peterson, \{Vanessa K.\} and Kearley, \{Gordon J.\} and Ramirez-Cuesta, \{Anibal J.\} and Kepert, \{Cameron J.\}",

year = "2013",

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T1 - Negative thermal expansion in LnCo(CN)6 (Ln=La, Pr, Sm, Ho, Lu, Y)

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AU - Duyker, Samuel G.

AU - Peterson, Vanessa K.

AU - Kearley, Gordon J.

AU - Ramirez-Cuesta, Anibal J.

AU - Kepert, Cameron J.

PY - 2013/5/10

Y1 - 2013/5/10

N2 - RUM with a twist: The magnitude of negative thermal expansion (NTE) in the LnCo(CN)6 coordination frameworks increases with Ln ion radius r Ln. The framework structure contains an unusual locally unstable trigonal prismatic LnN6 unit that participates in an NTE-contributing vibrational mode by twisting about its axis at low energies. This contrasts with the rigid unit modes (RUMs) prevalent in other systems.

AB - RUM with a twist: The magnitude of negative thermal expansion (NTE) in the LnCo(CN)6 coordination frameworks increases with Ln ion radius r Ln. The framework structure contains an unusual locally unstable trigonal prismatic LnN6 unit that participates in an NTE-contributing vibrational mode by twisting about its axis at low energies. This contrasts with the rigid unit modes (RUMs) prevalent in other systems.

KW - coordination frameworks

KW - inelastic neutron scattering

KW - lanthanoids

KW - metal cyanides

KW - rigid unit mode

UR - https://www.scopus.com/pages/publications/84877299103

U2 - 10.1002/anie.201300619

DO - 10.1002/anie.201300619

M3 - Article

AN - SCOPUS:84877299103

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JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 20

ER -

Negative thermal expansion in LnCo(CN)₆ (Ln=La, Pr, Sm, Ho, Lu, Y): Mechanisms and compositional trends

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Keywords

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