EHDTA: a green approach to efficient Ln³⁺-chelators

Area of Science:

• Coordination Chemistry
• Green Chemistry
• Lanthanoid Chemistry

Background:

• Lanthanoid ions (Ln³⁺) possess rich coordination chemistry vital for numerous applications.
• Current Ln³⁺ chelators like DOTA and DTPA rely on fossil-based resources.
• Development of sustainable chelating agents is crucial for green lanthanoid applications.

Purpose of the Study:

• To report a green and efficient synthesis of a novel chelating agent, EHDTA.
• To investigate the coordination chemistry of Ln³⁺-EHDTA complexes.
• To explore EHDTA as a sustainable ligand for lanthanoid chelation.

Main Methods:

• Synthesis of EHDTA from furfurylamine.
• Characterization of Ln³⁺-EHDTA complexes using NMR, relaxometry, potentiometry, and spectrophotometry.
• Evaluation of chelating affinity towards Ln³⁺ ions.

Main Results:

• Successful synthesis of a stereochemically defined, rigid, heptadentate chelator (EHDTA).
• EHDTA demonstrates good affinity for Ln³⁺ ions.
• Detailed insights into the coordination behavior of Ln³⁺-EHDTA complexes were obtained.

Conclusions:

• EHDTA represents a promising, sustainably derived ligand for lanthanoid ion chelation.
• The study highlights a green synthetic route to advanced chelating agents.
• Ln³⁺-EHDTA complexes exhibit interesting coordination properties with potential applications.