Composed in the f-block: solution structure and function of kinetically inert lanthanide(iii) complexes

Area of Science:

• Coordination Chemistry
• Supramolecular Chemistry
• Lanthanide Chemistry

Background:

• Over 15 years since the last comprehensive report on solution structures of lanthanide complexes with cyclen-derived polydentate ligands.
• Significant advancements in tools and techniques are poised to revolutionize the field.
• Need for consistent communication of results for broader accessibility.

Purpose of the Study:

• To outline fundamental tools for designing and investigating kinetically inert lanthanide complexes in solution.
• To establish a foundational understanding of these complexes.
• To bridge the gap between complex design, structural investigation, and spectroscopic characterization.

Main Methods:

• Detailed discussion of fundamental tools for lanthanide complex design and investigation.
• Analysis of 1H NMR spectra to understand conformational dynamics.
• Luminescence spectroscopy, including ligand- and metal-centered emission and time-resolved decay lifetimes.

Main Results:

• Established a link between conformations of cyclen-derived lanthanide complexes, their exchange rates, and their 1H NMR and luminescence spectra.
• Demonstrated that ligand- and metal-centered emission spectra provide rich structural information.
• Showed direct correlation between time-resolved luminescence decay lifetimes and solution structure.

Conclusions:

• The study provides essential information for researchers in lanthanide coordination chemistry.
• Highlights the utility of NMR and luminescence spectroscopy for elucidating solution structures.
• Aims to foster excitement and further research in the field of lanthanide coordination chemistry.