Related Experiment Video
Updated: Jun 9, 2025
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Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
2.2K
Energy exchange between Nd3+ and Er3+ centers within molecular complexes
Diamantoula Maniaki1,2, Annika Sickinger3, Leoní A Barrios1,2
1Departament de Química Inorgànica i Orgànica, Universitat de Barcelona Diagonal 645 08028 Barcelona Spain aromi@ub.edu.
Chemical Science
|October 31, 2024
Summary
Researchers developed a new molecular assembly for lanthanide energy transfer (ET). They discovered a unique mutual neodymium-to-erbium and erbium-to-neodymium ET mechanism within the complex.
Area of Science:
- Coordination Chemistry
- Photophysics
- Materials Science
Background:
- Controlled molecular assemblies with lanthanide centers are key for up- and down-conversion processes.
- Efficient in situ segregation of different lanthanide (Ln) metal ions within molecules is challenging.
- Previously developed [LnLn'Ln] heterometallic coordination compounds offer a platform for Ln-to-Ln' energy transfer (ET) studies.
Purpose of the Study:
- To synthesize and characterize a new [ErNdEr] heterometallic coordination compound.
- To investigate the mechanisms of neodymium-to-erbium (Nd-to-Er) energy transfer at the molecular level.
- To assess the photophysical properties and ET dynamics in related [LuNdLu] and [ErLaEr] complexes.
Main Methods:
- One-step synthesis of pure [ErNdEr], [LuNdLu], and [ErLaEr] coordination complexes.
- Photophysical characterization including emission spectra and excited state lifetime measurements.
- Analysis of energy transfer by comparing iso-absorbant solutions and lifetime values with/without lanthanide quenchers.
Main Results:
- Efficient sensitization of both Nd3+ and Er3+ ions via β-diketone ligands was observed.
- Highly resolved emission spectra and long excited state lifetimes facilitated ET assessment.
- A novel mutual Nd-to-Er and Er-to-Nd ET was discovered, with no net increase in brightness.
Conclusions:
- The [ErNdEr] complex enables the study of Nd-to-Er ET mechanisms at the molecular level.
- A unique bidirectional energy transfer phenomenon was identified between Nd3+ and Er3+ ions.
- This finding contributes to the understanding of energy transfer dynamics in complex lanthanide systems.
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