Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster

Apoorva Upadhyay; Navatha Komatireddy; Alberto Ghirri; Floriana Tuna; Stuart K. Langley; Anant K. Srivastava; E. Carolina Sañudo; Boujemaa Moubaraki; Keith S. Murray; Eric J L McInnes; Marco Affronte; Maheswaran Shanmugam

doi:10.1039/c3dt52384e

Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster

Apoorva Upadhyay
, Navatha Komatireddy
, Alberto Ghirri
, Floriana Tuna
, Stuart K. Langley
, Anant K. Srivastava
, E. Carolina Sañudo
, Boujemaa Moubaraki
, Keith S. Murray
, Eric J L McInnes
, Marco Affronte
, Maheswaran Shanmugam

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

Abstract

A linear trimeric cluster of molecular formula [Ni2Gd(L -)6](NO3) (1) (L- = (C 14H12NO2) has been isolated with its structure determined via single crystal X-ray diffraction. Magnetic susceptibility measurements of 1 show that the nickel and gadolinium ions are coupled ferromagnetically, with a ground total spin state (S) of 11/2. Best fit spin Hamiltonian parameters obtained for 1 are J1(Ni-Gd) = +0.54 cm -1, g = 2.01. EPR measurements confirm a low magnetic anisotropy (D = -0.135 cm-1) for 1. Heat capacity determination of the magnetocaloric effect (MCE) parameters for 1 shows that the change in magnetic entropy (-ΔSm) achieves a maximum of 13.74 J kg-1 K-1 at 4.0 K, with the ferromagnetic coupling giving a rapid change in low applied fields, confirming the potential of Gd molecular derivatives as coolants at liquid helium temperature. © 2014 The Royal Society of Chemistry.

Original language	English
Pages (from-to)	259-266
Number of pages	7
Journal	Dalton Transactions
Volume	43
Issue number	1
DOIs	https://doi.org/10.1039/c3dt52384e
Publication status	Published - 7 Jan 2014

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10.1039/c3dt52384e

CCDC 951599: Experimental Crystal Structure Determination
Upadhyay, A. (Contributor), Komatireddy, N. (Contributor), Ghirri, A. (Contributor), Tuna, F. (Contributor), Langley, S. K. (Contributor), Srivastava, A. K. (Contributor), Sañudo, E. C. (Contributor), Moubaraki, B. (Contributor), Murray, K. S. (Contributor), Mcinnes, E. (Contributor), Affronte, M. (Contributor) & Shanmugam, M. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2013
DOI: 10.5517/cc10y6rx, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/cc10y6rx&sid=DataCite
Dataset

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@article{e29bdb9853314d64b4213d1e30600bdc,

title = "Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster",

abstract = "A linear trimeric cluster of molecular formula [Ni2Gd(L -)6](NO3) (1) (L- = (C 14H12NO2) has been isolated with its structure determined via single crystal X-ray diffraction. Magnetic susceptibility measurements of 1 show that the nickel and gadolinium ions are coupled ferromagnetically, with a ground total spin state (S) of 11/2. Best fit spin Hamiltonian parameters obtained for 1 are J1(Ni-Gd) = +0.54 cm -1, g = 2.01. EPR measurements confirm a low magnetic anisotropy (D = -0.135 cm-1) for 1. Heat capacity determination of the magnetocaloric effect (MCE) parameters for 1 shows that the change in magnetic entropy (-ΔSm) achieves a maximum of 13.74 J kg-1 K-1 at 4.0 K, with the ferromagnetic coupling giving a rapid change in low applied fields, confirming the potential of Gd molecular derivatives as coolants at liquid helium temperature. {\textcopyright} 2014 The Royal Society of Chemistry.",

author = "Apoorva Upadhyay and Navatha Komatireddy and Alberto Ghirri and Floriana Tuna and Langley, \{Stuart K.\} and Srivastava, \{Anant K.\} and Sa{\~n}udo, \{E. Carolina\} and Boujemaa Moubaraki and Murray, \{Keith S.\} and McInnes, \{Eric J L\} and Marco Affronte and Maheswaran Shanmugam",

year = "2014",

month = jan,

day = "7",

doi = "10.1039/c3dt52384e",

language = "English",

volume = "43",

pages = "259--266",

journal = "Dalton Transactions",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster

AU - Upadhyay, Apoorva

AU - Komatireddy, Navatha

AU - Ghirri, Alberto

AU - Tuna, Floriana

AU - Langley, Stuart K.

AU - Srivastava, Anant K.

AU - Sañudo, E. Carolina

AU - Moubaraki, Boujemaa

AU - Murray, Keith S.

AU - McInnes, Eric J L

AU - Affronte, Marco

AU - Shanmugam, Maheswaran

PY - 2014/1/7

Y1 - 2014/1/7

N2 - A linear trimeric cluster of molecular formula [Ni2Gd(L -)6](NO3) (1) (L- = (C 14H12NO2) has been isolated with its structure determined via single crystal X-ray diffraction. Magnetic susceptibility measurements of 1 show that the nickel and gadolinium ions are coupled ferromagnetically, with a ground total spin state (S) of 11/2. Best fit spin Hamiltonian parameters obtained for 1 are J1(Ni-Gd) = +0.54 cm -1, g = 2.01. EPR measurements confirm a low magnetic anisotropy (D = -0.135 cm-1) for 1. Heat capacity determination of the magnetocaloric effect (MCE) parameters for 1 shows that the change in magnetic entropy (-ΔSm) achieves a maximum of 13.74 J kg-1 K-1 at 4.0 K, with the ferromagnetic coupling giving a rapid change in low applied fields, confirming the potential of Gd molecular derivatives as coolants at liquid helium temperature. © 2014 The Royal Society of Chemistry.

AB - A linear trimeric cluster of molecular formula [Ni2Gd(L -)6](NO3) (1) (L- = (C 14H12NO2) has been isolated with its structure determined via single crystal X-ray diffraction. Magnetic susceptibility measurements of 1 show that the nickel and gadolinium ions are coupled ferromagnetically, with a ground total spin state (S) of 11/2. Best fit spin Hamiltonian parameters obtained for 1 are J1(Ni-Gd) = +0.54 cm -1, g = 2.01. EPR measurements confirm a low magnetic anisotropy (D = -0.135 cm-1) for 1. Heat capacity determination of the magnetocaloric effect (MCE) parameters for 1 shows that the change in magnetic entropy (-ΔSm) achieves a maximum of 13.74 J kg-1 K-1 at 4.0 K, with the ferromagnetic coupling giving a rapid change in low applied fields, confirming the potential of Gd molecular derivatives as coolants at liquid helium temperature. © 2014 The Royal Society of Chemistry.

U2 - 10.1039/c3dt52384e

DO - 10.1039/c3dt52384e

M3 - Article

SN - 1477-9234

VL - 43

SP - 259

EP - 266

JO - Dalton Transactions

JF - Dalton Transactions

IS - 1

ER -

Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster

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CCDC 951599: Experimental Crystal Structure Determination

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