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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
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Exceptionally slow magnetic relaxation in a mononuclear hexacoordinate Ni(ii) complex.
Ján Titiš1, Veronika Chrenková1, Cyril Rajnák1
1Department of Chemistry, Faculty of Natural Sciences, University of SS Cyril and Methodius, 91701 Trnava, Slovakia. roman.boca@ucm.sk.
Dalton Transactions (Cambridge, England : 2003)
|July 19, 2019
Summary
This study introduces a nickel complex exhibiting slow magnetic relaxation, a key property for potential data storage applications. The relaxation behavior is significantly influenced by an external magnetic field.
Area of Science:
- Coordination Chemistry
- Magnetism
- Materials Science
Background:
- Single-molecule magnets (SMMs) are crucial for advancing high-density data storage and quantum computing.
- Developing new SMMs with controllable magnetic properties remains a significant challenge in materials science.
Purpose of the Study:
- To synthesize and characterize a novel hexacoordinate mononuclear nickel complex, [Ni(pydm)2](dnbz)2.
- To investigate the magnetic relaxation properties of the synthesized complex, particularly its response to an external magnetic field.
Main Methods:
- Synthesis and structural characterization of the nickel complex.
- Magnetic susceptibility measurements (DC and AC).
- Analysis of field-induced slow magnetic relaxation using various magnetic field strengths and temperatures.
Main Results:
- The hexacoordinate mononuclear [Ni(pydm)2](dnbz)2 complex was successfully synthesized.
- Field-induced slow magnetic relaxation was observed, indicating potential SMM behavior.
- Two to three distinct relaxation channels were identified, strongly supported by an external magnetic field.
- At 0.8 T and 1.9 K, a low-frequency relaxation time of 1.3 s was recorded with a mole fraction of 0.47.
Conclusions:
- The [Ni(pydm)2](dnbz)2 complex demonstrates promising slow magnetic relaxation properties.
- The observed relaxation behavior is highly dependent on external magnetic fields, suggesting tunability.
- This nickel complex represents a potential candidate for applications in molecular magnetism and data storage.
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