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Lanthanide loading of luminescent multi-tridentate polymers under thermodynamic control
Lucille Babel1, Thi Nhu Y Hoang, Homayoun Nozary
1Department of Inorganic, Analytical and Applied Chemistry, University of Geneva , 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
Inorganic Chemistry
|January 22, 2014
Summary
This study uses statistical mechanics to understand how trivalent lanthanides bind to polymers. Europium and yttrium ions show promise for creating new heterometallic materials with light-downshifting properties.
Area of Science:
- Coordination Chemistry
- Materials Science
- Statistical Mechanics
Background:
- Lanthanide polymers are of interest for advanced materials.
- Controlling lanthanide complexation within polymers is challenging.
- Organized heterometallic f–f′ materials require precise control over lanthanide incorporation.
Purpose of the Study:
- To rationalize the loading of linear multitridentate polymers with trivalent lanthanides (Ln(III)).
- To identify specific lanthanide ions for designing organized heterometallic f–f′ materials.
- To model the formation of lanthanidopolymers using microscopic descriptors.
Main Methods:
- Application of basic statistical mechanics principles.
- Modeling thermodynamically controlled formation of Wolf type-II lanthanidopolymers.
- Utilizing intrinsic affinity (fN3(Ln)) and intermetallic interactions (ΔE1–2(Ln,Ln)) as descriptors.
Main Results:
- Selective complexation of Ln(III) was observed, with Europium (Eu(III)) showing high affinity.
- Anticooperative interactions influenced lanthanide fixation, favoring Eu(III) in semiorganized structures.
- Europium-containing lanthanidopolymers exhibited exploitable light-downshifting properties.
Conclusions:
- Statistical mechanics provides a framework for understanding lanthanide-polymer interactions.
- Europium and yttrium ionic sizes are key for designing heterometallic f–f′ materials.
- The developed model aids in the rational design of functional lanthanidopolymers.
