Journal
NANO RESEARCH
Volume -, Issue -, Pages -Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-5206-5
Keywords
1,4-bis(imidazole-1-yl)benzene; antiferromagnetic; cobalt; chain structure; oxalate
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Funding
- National Natural Science Foundation of China [22101091, 21901078]
- State Key Laboratory of Solidification Processing in NWPU [SKLSP202016]
- Innovation and Talent Recruitment Base of New Energy Chemistry and Device [B210003]
- Knowledge Innovation Program of Wuhan-Basic Research
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A new one-dimensional antiferromagnet Co(ox)(bib)center dot H2O has been successfully synthesized and characterized. The magnetic susceptibility and heat capacity results indicate that this material exhibits good one-dimensional magnetism.
A new one-dimensional (1D) chain antiferromagnet Co(ox)(bib)center dot H2O (ox = oxalate; bib = 1,4-bis(imidazole-1-yl)benzene) has been successfully synthesized under hydrothermal condition and characterized by single crystal X-ray crystallography, powder X-ray diffraction, thermogravimetric analysis, Fourier transform infrared (FTIR) spectroscopy, magnetic susceptibility, and heat capacity measurements. The Co-II ion is connected by oxalate ions in trans-configuration to form 1D Co-II-ox-Co-II spin chains, which are further separated by the long organic molecule bib. The magnetic susceptibility curve shows that 1 exhibits a feature of broad maximum around 29 K, indicating strong antiferromagnetic interactions with short spin-spin correlations along the spin chains. However, no long-range order is observed due to the negligible interchain interactions through bib ligand and weak hydrogen bonds, which is further confirmed by the heat capacity data. The intrachain interaction J of -8.4 K is estimated. Both magnetic susceptibility and heat capacity results indicate that 1 exhibits a good 1D magnetism.
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