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Tunable Emission in Samarium(III) Complexes for Display Applications: Synthesis, Structural Features and
Sonia Redhu1, Devender Singh2, Swati Dalal1
1Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, Haryana, India.
Journal of Fluorescence
|July 16, 2026
Summary
Novel luminescent samarium(III) complexes were synthesized, showing tunable red and pink emissions. Ligand design effectively controlled photophysical properties for potential optoelectronic applications.
Area of Science:
- Coordination Chemistry
- Materials Science
- Photophysics
Background:
- Samarium(III) complexes are explored for luminescent applications.
- Tuning photophysical properties requires understanding structure-property relationships.
- Ligand design is crucial for controlling emission characteristics.
Purpose of the Study:
- To synthesize and characterize novel luminescent samarium(III) complexes.
- To investigate the influence of ancillary ligands on photophysical and electronic properties.
- To explore their potential in optoelectronic and semiconducting applications.
Main Methods:
- Synthesis of four Sm(III) complexes with β-diketonate and phenanthroline ligands.
- Characterization using elemental analysis, FTIR, 1H NMR, and TGA.
- Photophysical measurements including emission spectra and CIE chromaticity coordinates.
Main Results:
- Successful synthesis of [Sm(TFPD)3Z] complexes with good thermal stability.
- Exhibited semiconducting behavior with optical band gaps from 2.89 to 3.39 eV.
- Intense orange-red emission (~648 nm) observed, tunable across red, reddish-orange, and pink regions via ligand engineering.
Conclusions:
- Ancillary ligand design is pivotal for controlling energy transfer and Sm(III) emission.
- These Sm(III) complexes show promise for advanced display and solid-state lighting.
- Demonstrated effective color modulation through systematic ligand modification.
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