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Related Experiment Video

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Lanthanide-Based Organic Salts: Synthesis, Characterization, and Cytotoxicity Studies.

Andreia Forte1,2, Sandra Gago1, Celso Alves3

  • 1Associated Laboratory for Green Chemistry (LAQV) of the Network of Chemistry and Technology (REQUIMTE), Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal.

Molecules (Basel, Switzerland)
|October 28, 2023
PubMed
Summary

New magnetic ionic liquids (MILs) using Gadolinium(III) and Terbium(III) anions were synthesized. These lanthanide-based salts exhibit tunable magnetic moments and low toxicity, showing promise for various applications.

Keywords:
MRI contrast agentscytotoxicitygadolinium saltsmagnetic organic saltsterbium salts

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Supramolecular Chemistry

Background:

  • Magnetic ionic liquids (MILs) offer unique properties by combining ionic liquid characteristics with magnetic behavior.
  • Lanthanide ions, particularly Gadolinium(III) and Terbium(III), possess distinct magnetic properties valuable for advanced materials.

Purpose of the Study:

  • To synthesize and characterize novel lanthanide-based magnetic ionic liquids using various cation families.
  • To investigate the magnetic properties of these MILs and correlate them with their structural features.
  • To evaluate the cytotoxicity of the synthesized lanthanide-based salts.

Main Methods:

  • Synthesis of choline-family-based and other organic salts incorporating Gadolinium(III) and Terbium(III) anions.
  • Characterization of the synthesized salts, including determination of melting temperatures.
  • Measurement of magnetic moments for Gd(III) and Tb(III) containing salts.
  • Cytotoxicity assays using cell lines (3T3, 293T, Caco2, HepG2).

Main Results:

  • Successfully synthesized solid organic salts with melting points above 100 °C.
  • Observed magnetic moments for Gd(III) salts ranged from 6.55-7.30 Bohr magnetons (MB), while Tb(III) salts ranged from 8.22-9.34 MB.
  • Established a correlation between lanthanide magnetic moments and the cation's structural characteristics.
  • Demonstrated that most prepared lanthanide-based salts exhibit low toxicity across tested cell lines.

Conclusions:

  • Novel lanthanide-based magnetic ionic liquids were successfully prepared with tunable magnetic properties.
  • The structural features of the cation significantly influence the magnetic moments of the lanthanide anions.
  • The synthesized MILs show a favorable safety profile, indicating potential for applications where low toxicity is crucial.