Synthesis, structures, and magnetic properties of a series of new heterometallic hexanuclear Co2Ln4 (Ln = Eu, Gd, Tb and Dy) clusters

Chong Bin Tian; Da Qiang Yuan; Yun Hu Han; Zhi Hua Li; Ping Lin; Shao Wu Du

doi:10.1039/c4qi00116h

Synthesis, structures, and magnetic properties of a series of new heterometallic hexanuclear Co₂Ln₄ (Ln = Eu, Gd, Tb and Dy) clusters

Chong Bin Tian
, Da Qiang Yuan
, Yun Hu Han
, Zhi Hua Li
, Ping Lin
, Shao Wu Du

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

38 Scopus citations

Abstract

A series of new Co-Ln heterometallic clusters formulated as [Co₂Ln₄(μ₃-OH)₂(piv)₄(hmmp)₄(ae)₂]·(NO₃)₂·2H₂O (Ln = Eu (1), Gd (2), Tb (3), Dy (4), H₂hmmp = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol, Hae = 2-aminoethanol, Hpiv = pivalic acid) were synthesized and characterized. X-ray crystallography reveals that each of them contains a heterometallic {Ln₄Co₂} core, which is supported by two μ₃-hydroxide, four piv^-, four hmmp^2- and two ae^- ligands. The magnetic investigation indicates that 2 exhibits weak antiferromagnetic interactions between Gd^III ions, and a large MCE value of 24.9 J kg^-1 K^-1, while 4 shows a fast relaxation of magnetization. The TGA and VT-PXRD measurements suggest that all the compounds show good thermal stability and can be stable up to about 220 °C. In addition, to address the influence of the Gd-O-Gd angles on the magnetic properties, compound 2 was compared with a series of compounds involving different bridges between Gd^III ions. The comparison reveals that the tiny difference in the Gd-O-Gd angles favors different magnetic coupling.

Original language	English
Pages (from-to)	695-704
Number of pages	10
Journal	Inorganic Chemistry Frontiers
Volume	1
Issue number	9
DOIs	https://doi.org/10.1039/c4qi00116h
State	Published - Nov 2014
Externally published	Yes

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@article{78dcbc2886b546acb53bb08536d67ce4,

title = "Synthesis, structures, and magnetic properties of a series of new heterometallic hexanuclear Co2Ln4 (Ln = Eu, Gd, Tb and Dy) clusters",

abstract = "A series of new Co-Ln heterometallic clusters formulated as [Co2Ln4(μ3-OH)2(piv)4(hmmp)4(ae)2]·(NO3)2·2H2O (Ln = Eu (1), Gd (2), Tb (3), Dy (4), H2hmmp = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol, Hae = 2-aminoethanol, Hpiv = pivalic acid) were synthesized and characterized. X-ray crystallography reveals that each of them contains a heterometallic \{Ln4Co2\} core, which is supported by two μ3-hydroxide, four piv-, four hmmp2- and two ae- ligands. The magnetic investigation indicates that 2 exhibits weak antiferromagnetic interactions between GdIII ions, and a large MCE value of 24.9 J kg-1 K-1, while 4 shows a fast relaxation of magnetization. The TGA and VT-PXRD measurements suggest that all the compounds show good thermal stability and can be stable up to about 220 °C. In addition, to address the influence of the Gd-O-Gd angles on the magnetic properties, compound 2 was compared with a series of compounds involving different bridges between GdIII ions. The comparison reveals that the tiny difference in the Gd-O-Gd angles favors different magnetic coupling.",

author = "Tian, \{Chong Bin\} and Yuan, \{Da Qiang\} and Han, \{Yun Hu\} and Li, \{Zhi Hua\} and Ping Lin and Du, \{Shao Wu\}",

note = "Publisher Copyright: {\textcopyright} the Partner Organisations 2014.",

year = "2014",

month = nov,

doi = "10.1039/c4qi00116h",

language = "英语",

volume = "1",

pages = "695--704",

journal = "Inorganic Chemistry Frontiers",

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TY - JOUR

T1 - Synthesis, structures, and magnetic properties of a series of new heterometallic hexanuclear Co2Ln4 (Ln = Eu, Gd, Tb and Dy) clusters

AU - Tian, Chong Bin

AU - Yuan, Da Qiang

AU - Han, Yun Hu

AU - Li, Zhi Hua

AU - Lin, Ping

AU - Du, Shao Wu

PY - 2014/11

Y1 - 2014/11

N2 - A series of new Co-Ln heterometallic clusters formulated as [Co2Ln4(μ3-OH)2(piv)4(hmmp)4(ae)2]·(NO3)2·2H2O (Ln = Eu (1), Gd (2), Tb (3), Dy (4), H2hmmp = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol, Hae = 2-aminoethanol, Hpiv = pivalic acid) were synthesized and characterized. X-ray crystallography reveals that each of them contains a heterometallic {Ln4Co2} core, which is supported by two μ3-hydroxide, four piv-, four hmmp2- and two ae- ligands. The magnetic investigation indicates that 2 exhibits weak antiferromagnetic interactions between GdIII ions, and a large MCE value of 24.9 J kg-1 K-1, while 4 shows a fast relaxation of magnetization. The TGA and VT-PXRD measurements suggest that all the compounds show good thermal stability and can be stable up to about 220 °C. In addition, to address the influence of the Gd-O-Gd angles on the magnetic properties, compound 2 was compared with a series of compounds involving different bridges between GdIII ions. The comparison reveals that the tiny difference in the Gd-O-Gd angles favors different magnetic coupling.

AB - A series of new Co-Ln heterometallic clusters formulated as [Co2Ln4(μ3-OH)2(piv)4(hmmp)4(ae)2]·(NO3)2·2H2O (Ln = Eu (1), Gd (2), Tb (3), Dy (4), H2hmmp = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol, Hae = 2-aminoethanol, Hpiv = pivalic acid) were synthesized and characterized. X-ray crystallography reveals that each of them contains a heterometallic {Ln4Co2} core, which is supported by two μ3-hydroxide, four piv-, four hmmp2- and two ae- ligands. The magnetic investigation indicates that 2 exhibits weak antiferromagnetic interactions between GdIII ions, and a large MCE value of 24.9 J kg-1 K-1, while 4 shows a fast relaxation of magnetization. The TGA and VT-PXRD measurements suggest that all the compounds show good thermal stability and can be stable up to about 220 °C. In addition, to address the influence of the Gd-O-Gd angles on the magnetic properties, compound 2 was compared with a series of compounds involving different bridges between GdIII ions. The comparison reveals that the tiny difference in the Gd-O-Gd angles favors different magnetic coupling.

UR - https://www.scopus.com/pages/publications/84942420396

U2 - 10.1039/c4qi00116h

DO - 10.1039/c4qi00116h

M3 - 文章

AN - SCOPUS:84942420396

SN - 2052-1553

VL - 1

SP - 695

EP - 704

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 9

ER -

Synthesis, structures, and magnetic properties of a series of new heterometallic hexanuclear Co₂Ln₄ (Ln = Eu, Gd, Tb and Dy) clusters

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