Synthesis and structural and magnetic characterization of cobalt(II) phosphonate cage compounds

Stuart Langley; Madeleine Helliwell; Roberta Sessoli; Simon J. Teat; Richard E P Winpenny

doi:10.1021/ic700984r

Synthesis and structural and magnetic characterization of cobalt(II) phosphonate cage compounds

Stuart Langley, Madeleine Helliwell, Roberta Sessoli, Simon J. Teat, Richard E P Winpenny

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

Abstract

Reaction of cobalt salts with phosphonic acids in the presence of 6-chloro-2-hydroxypyridine as a co-ligand, normally in its deprotonated form, leads to a series of new polymetallic cobalt cages. The most common structural type is a {Co14} cage which resembles a fragment of cobalt hydroxide. Variation of the phosphonate present and the cobalt salt leads to {Co 6}, {Co8}, {Co10}, {Co11}, {Co 12}, {Co13}, and {Co20} cages, all of which have been characterized by X-ray crystallography. Magnetic studies of these cages show a general decline in the product χmT with T, but for {Co6}, {Co8}, and {Co12} there are maxima at low temperature, which suggests nondiamagnetic ground states. Investigation of the dynamic behavior of the magnetization of these complexes shows that the octanuclear cage displays slow relaxation of magnetization. © 2008 American Chemical Society.

Original language	English
Pages (from-to)	497-507
Number of pages	10
Journal	Inorganic Chemistry: including bioinorganic chemistry
Volume	47
Issue number	2
DOIs	https://doi.org/10.1021/ic700984r
Publication status	Published - 21 Jan 2008

Keywords

SINGLE-MOLECULE MAGNETS
GROUND-STATE
CARBOXYLATE CLUSTERS
CHAIN
MAGNET
NI-II
COMPLEXES
LIGANDS
SPIN
MN
BISTABILITY

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10.1021/ic700984r

CCDC 682078: Experimental Crystal Structure Determination
Langley, S. K. (Contributor), Helliwell, M. (Contributor), Sessoli, R. (Contributor), Teat, S. J. (Contributor) & Winpenny, R. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2008
DOI: 10.5517/ccqwrjv, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccqwrjv&sid=DataCite
Dataset
CCDC 682081: Experimental Crystal Structure Determination
Langley, S. K. (Contributor), Helliwell, M. (Contributor), Sessoli, R. (Contributor), Teat, S. J. (Contributor) & Winpenny, R. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2008
DOI: 10.5517/ccqwrmy, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccqwrmy&sid=DataCite
Dataset
CCDC 682074: Experimental Crystal Structure Determination
Langley, S. K. (Contributor), Helliwell, M. (Contributor), Sessoli, R. (Contributor), Teat, S. J. (Contributor) & Winpenny, R. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2008
DOI: 10.5517/ccqwrdq, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccqwrdq&sid=DataCite
Dataset

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@article{da8404857f9849918492b8e315549fda,

title = "Synthesis and structural and magnetic characterization of cobalt(II) phosphonate cage compounds",

abstract = "Reaction of cobalt salts with phosphonic acids in the presence of 6-chloro-2-hydroxypyridine as a co-ligand, normally in its deprotonated form, leads to a series of new polymetallic cobalt cages. The most common structural type is a {Co14} cage which resembles a fragment of cobalt hydroxide. Variation of the phosphonate present and the cobalt salt leads to {Co 6}, {Co8}, {Co10}, {Co11}, {Co 12}, {Co13}, and {Co20} cages, all of which have been characterized by X-ray crystallography. Magnetic studies of these cages show a general decline in the product χmT with T, but for {Co6}, {Co8}, and {Co12} there are maxima at low temperature, which suggests nondiamagnetic ground states. Investigation of the dynamic behavior of the magnetization of these complexes shows that the octanuclear cage displays slow relaxation of magnetization. {\textcopyright} 2008 American Chemical Society.",

keywords = "SINGLE-MOLECULE MAGNETS, GROUND-STATE, CARBOXYLATE CLUSTERS, CHAIN, MAGNET, NI-II, COMPLEXES, LIGANDS, SPIN, MN, BISTABILITY",

author = "Stuart Langley and Madeleine Helliwell and Roberta Sessoli and Teat, {Simon J.} and Winpenny, {Richard E P}",

note = "Langley, Stuart Helliwell, Madeleine Sessoli, Roberta Teat, Simon J. Winpenny, Richard E. P. 53 AMER CHEMICAL SOC WASHINGTON 250RC",

year = "2008",

month = jan,

day = "21",

doi = "10.1021/ic700984r",

language = "English",

volume = "47",

pages = "497--507",

journal = "Inorganic Chemistry: including bioinorganic chemistry ",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "2",

}

TY - JOUR

T1 - Synthesis and structural and magnetic characterization of cobalt(II) phosphonate cage compounds

AU - Langley, Stuart

AU - Helliwell, Madeleine

AU - Sessoli, Roberta

AU - Teat, Simon J.

AU - Winpenny, Richard E P

N1 - Langley, Stuart Helliwell, Madeleine Sessoli, Roberta Teat, Simon J. Winpenny, Richard E. P. 53 AMER CHEMICAL SOC WASHINGTON 250RC

PY - 2008/1/21

Y1 - 2008/1/21

N2 - Reaction of cobalt salts with phosphonic acids in the presence of 6-chloro-2-hydroxypyridine as a co-ligand, normally in its deprotonated form, leads to a series of new polymetallic cobalt cages. The most common structural type is a {Co14} cage which resembles a fragment of cobalt hydroxide. Variation of the phosphonate present and the cobalt salt leads to {Co 6}, {Co8}, {Co10}, {Co11}, {Co 12}, {Co13}, and {Co20} cages, all of which have been characterized by X-ray crystallography. Magnetic studies of these cages show a general decline in the product χmT with T, but for {Co6}, {Co8}, and {Co12} there are maxima at low temperature, which suggests nondiamagnetic ground states. Investigation of the dynamic behavior of the magnetization of these complexes shows that the octanuclear cage displays slow relaxation of magnetization. © 2008 American Chemical Society.

AB - Reaction of cobalt salts with phosphonic acids in the presence of 6-chloro-2-hydroxypyridine as a co-ligand, normally in its deprotonated form, leads to a series of new polymetallic cobalt cages. The most common structural type is a {Co14} cage which resembles a fragment of cobalt hydroxide. Variation of the phosphonate present and the cobalt salt leads to {Co 6}, {Co8}, {Co10}, {Co11}, {Co 12}, {Co13}, and {Co20} cages, all of which have been characterized by X-ray crystallography. Magnetic studies of these cages show a general decline in the product χmT with T, but for {Co6}, {Co8}, and {Co12} there are maxima at low temperature, which suggests nondiamagnetic ground states. Investigation of the dynamic behavior of the magnetization of these complexes shows that the octanuclear cage displays slow relaxation of magnetization. © 2008 American Chemical Society.

KW - SINGLE-MOLECULE MAGNETS

KW - GROUND-STATE

KW - CARBOXYLATE CLUSTERS

KW - CHAIN

KW - MAGNET

KW - NI-II

KW - COMPLEXES

KW - LIGANDS

KW - SPIN

KW - MN

KW - BISTABILITY

U2 - 10.1021/ic700984r

DO - 10.1021/ic700984r

M3 - Article

SN - 0020-1669

VL - 47

SP - 497

EP - 507

JO - Inorganic Chemistry: including bioinorganic chemistry

JF - Inorganic Chemistry: including bioinorganic chemistry

IS - 2

ER -

Synthesis and structural and magnetic characterization of cobalt(II) phosphonate cage compounds

Abstract

Keywords

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Datasets

CCDC 682078: Experimental Crystal Structure Determination

CCDC 682081: Experimental Crystal Structure Determination

CCDC 682074: Experimental Crystal Structure Determination

Cite this