Slow magnetic relaxation in a carboxylate-bridged CoII complex

Shuang Liu; Lei Lei Li; Wen Zhen Wang; Tian Han; Hong Ling Gao; Jian Zhong Cui

doi:10.1016/j.molstruc.2017.08.110

Slow magnetic relaxation in a carboxylate-bridged Co^II complex

Shuang Liu
, Lei Lei Li
, Wen Zhen Wang
, Tian Han
, Hong Ling Gao
, Jian Zhong Cui

School of Chemistry

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

8 Scopus citations

Abstract

A new Co(II) complex, {[Co(MPA)(4,4′-bpy)(H₂O)]·2H₂O}_n (1) (H₂MPA = 4-methylphthalic acid, 4,4′-bpy = 4,4′-bipyridine), has been prepared under solvothermal condition and fully characterized. The X-ray crystallography test demonstrates that 1 exhibits two-dimensional (2D) layer structure in which the helical Co(II) chains linked by syn-anti carboxylate bridges are connected by 4,4′-bpy ligands. Weak ferromagnetism was observed on direct-current (dc) susceptibility due to the collective effects of the helical chain structure and antiferromagnetic couplings between Co(II) ions transmitted by μ₂-1,3-carboxylate groups. Interestingly, slow magnetic relaxation was observed in 1 at liquid helium temperatures without an external dc field.

Original language	English
Pages (from-to)	293-298
Number of pages	6
Journal	Journal of Molecular Structure
Volume	1150
DOIs	https://doi.org/10.1016/j.molstruc.2017.08.110
State	Published - 15 Dec 2017

Keywords

4,4-bipyridine
4-methylphtalic acid
Cobalt complex
Helical chain
Slow magnetic relaxation

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10.1016/j.molstruc.2017.08.110

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@article{7e661176337e410faabe99c596a7ac29,

title = "Slow magnetic relaxation in a carboxylate-bridged CoII complex",

abstract = "A new Co(II) complex, \{[Co(MPA)(4,4′-bpy)(H2O)]·2H2O\}n (1) (H2MPA = 4-methylphthalic acid, 4,4′-bpy = 4,4′-bipyridine), has been prepared under solvothermal condition and fully characterized. The X-ray crystallography test demonstrates that 1 exhibits two-dimensional (2D) layer structure in which the helical Co(II) chains linked by syn-anti carboxylate bridges are connected by 4,4′-bpy ligands. Weak ferromagnetism was observed on direct-current (dc) susceptibility due to the collective effects of the helical chain structure and antiferromagnetic couplings between Co(II) ions transmitted by μ2-1,3-carboxylate groups. Interestingly, slow magnetic relaxation was observed in 1 at liquid helium temperatures without an external dc field.",

keywords = "4,4-bipyridine, 4-methylphtalic acid, Cobalt complex, Helical chain, Slow magnetic relaxation",

author = "Shuang Liu and Li, \{Lei Lei\} and Wang, \{Wen Zhen\} and Tian Han and Gao, \{Hong Ling\} and Cui, \{Jian Zhong\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = dec,

day = "15",

doi = "10.1016/j.molstruc.2017.08.110",

language = "英语",

volume = "1150",

pages = "293--298",

journal = "Journal of Molecular Structure",

issn = "0022-2860",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Slow magnetic relaxation in a carboxylate-bridged CoII complex

AU - Liu, Shuang

AU - Li, Lei Lei

AU - Wang, Wen Zhen

AU - Han, Tian

AU - Gao, Hong Ling

AU - Cui, Jian Zhong

PY - 2017/12/15

Y1 - 2017/12/15

N2 - A new Co(II) complex, {[Co(MPA)(4,4′-bpy)(H2O)]·2H2O}n (1) (H2MPA = 4-methylphthalic acid, 4,4′-bpy = 4,4′-bipyridine), has been prepared under solvothermal condition and fully characterized. The X-ray crystallography test demonstrates that 1 exhibits two-dimensional (2D) layer structure in which the helical Co(II) chains linked by syn-anti carboxylate bridges are connected by 4,4′-bpy ligands. Weak ferromagnetism was observed on direct-current (dc) susceptibility due to the collective effects of the helical chain structure and antiferromagnetic couplings between Co(II) ions transmitted by μ2-1,3-carboxylate groups. Interestingly, slow magnetic relaxation was observed in 1 at liquid helium temperatures without an external dc field.

AB - A new Co(II) complex, {[Co(MPA)(4,4′-bpy)(H2O)]·2H2O}n (1) (H2MPA = 4-methylphthalic acid, 4,4′-bpy = 4,4′-bipyridine), has been prepared under solvothermal condition and fully characterized. The X-ray crystallography test demonstrates that 1 exhibits two-dimensional (2D) layer structure in which the helical Co(II) chains linked by syn-anti carboxylate bridges are connected by 4,4′-bpy ligands. Weak ferromagnetism was observed on direct-current (dc) susceptibility due to the collective effects of the helical chain structure and antiferromagnetic couplings between Co(II) ions transmitted by μ2-1,3-carboxylate groups. Interestingly, slow magnetic relaxation was observed in 1 at liquid helium temperatures without an external dc field.

KW - 4,4-bipyridine

KW - 4-methylphtalic acid

KW - Cobalt complex

KW - Helical chain

KW - Slow magnetic relaxation

UR - https://www.scopus.com/pages/publications/85028696244

U2 - 10.1016/j.molstruc.2017.08.110

DO - 10.1016/j.molstruc.2017.08.110

M3 - 文章

AN - SCOPUS:85028696244

SN - 0022-2860

VL - 1150

SP - 293

EP - 298

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

ER -

Slow magnetic relaxation in a carboxylate-bridged Co^II complex

Abstract

Keywords

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