The ferromagnetic [Ln2Co6] heterometallic complexes
Xiao-Qing Zhao1, Jin Wang2, Dong-Xu Bao2
1College of Science, Sichuan Agricultural University, Ya'an 625014, China. zhaoxiaoqing@sicau.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
Dalton Transactions (Cambridge, England : 2003)
|January 28, 2017
Summary
New 3d-4f heterometallic complexes containing lanthanide and cobalt ions were synthesized. These magnetic materials exhibit ferromagnetic coupling and slow relaxation of magnetization, indicating potential for advanced magnetic applications.
Area of Science:
- Coordination Chemistry
- Materials Science
- Magnetochemistry
Background:
- Heterometallic complexes incorporating 3d and 4f metal ions are of significant interest for their unique magnetic properties.
- Lanthanide-cobalt clusters offer tunable electronic structures and magnetic behaviors.
Purpose of the Study:
- To synthesize and characterize novel 3d-4f heterometallic complexes.
- To investigate the structural and magnetic properties of these complexes, focusing on lanthanide-cobalt interactions.
Main Methods:
- Synthesis of four heterometallic complexes using 6-chloro-2-pyridinol and pivalic acid ligands.
- Single-crystal X-ray diffraction for structural determination.
- Magnetic susceptibility measurements to probe magnetic interactions.
Main Results:
- Four complexes with the formula {[Ln2Co6(OH)4(L1)6(L2)8(CH3CN)2]·nCH2Cl2} were successfully synthesized (Ln = Dy, Ho, Gd, Y).
- Structural analysis revealed a [Ln2Co6] core with a unique edge-sharing double-trigonal-bipyramid configuration.
- Magnetic studies indicated ferromagnetic coupling in Dy-Co and Ho-Co complexes, with Dy-Co complex showing slow relaxation of magnetization.
Conclusions:
- The synthesized heterometallic complexes possess intriguing structural and magnetic properties.
- The observed ferromagnetic coupling and slow magnetic relaxation in specific complexes highlight their potential for developing single-molecule magnets or other magnetic materials.
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