Citation: Yadan SUN, Xinfeng LI, Qiang LIU, Oshio Hiroki, Yinshan MENG. Structures and magnetism of dinuclear Co complexes based on imine derivatives[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(11): 2212-2220. doi: 10.11862/CJIC.20240131 shu

Structures and magnetism of dinuclear Co complexes based on imine derivatives

Yadan SUN ^{1, #} ,
Xinfeng LI ^{1, #} ,
Qiang LIU ² ,
Oshio Hiroki ¹ ,
Yinshan MENG ^1,,

1.
State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian, Liaoning 116024, China
2.
Instrumental Analysis Center, Dalian University of Technology, Dalian, Liaoning 116024, China

Corresponding author: Yinshan MENG, mengys@dlut.edu.cn

Received Date: 13 April 2024
Revised Date: 10 September 2024

Figures(5)

This study presents the synthesis of three dinuclear cobalt complexes based on three imine derivatives: bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether (L₁), bis-[4-(2-pyridylmethyleneamino)-phenyl]ether (L₂), and bis-[4-(2-pyridylmethyleneamino)-phenyl]methane (L₃). Single-crystal X-ray diffraction analysis reveals that the complexes [Co₂(L₁)₃](ClO₄)₄·2CH₃CN (1), [Co₂(L₂)₃](ClO₄)₄·2CH₃OH (2), and [Co₂(L₃)₃](ClO₄)₄·2CH₃OH (3) all exhibit a dinuclear structure. Magnetic test results show that complex 3 exhibited irreversible SCO behavior induced by loss of solvent at 300 K, with the average Co—N bond length increasing from 0.213 9(3) to 0.215 3(3) nm. Meanwhile, the desolvated complex 3 exhibited paramagnetic behavior similar to that of complexes 1 and 2. Variable-temperature UV-Vis spectroscopic studies also indicate that complex 3 undergoes a solvent-loss-induced spin-state transition.
- spin crossover,
- dinuclear cobalt complex,
- imine derivatives
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