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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
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Luminance and Brightness: Application to Lanthanide-Based Coordination Polymers.
Chloé Blais1, Guillaume Calvez1, Yan Suffren1
1Université de Rennes, INSA Rennes, CNRS UMR 6226 "Institut des Sciences Chimiques de Rennes", 35708Rennes, France.
Inorganic Chemistry
|November 17, 2022
Summary
Luminescence intensity in lanthanide coordination polymers cannot be determined by quantum yield alone. Luminance measurements are essential for accurate quantification, especially for comparing different emission colors.
Area of Science:
- Materials Science
- Photochemistry
- Solid-State Chemistry
Background:
- Lanthanide-based coordination polymers are crucial for technological applications requiring luminescence.
- Accurate measurement of luminescence intensity is vital for material selection and development.
- Existing metrics like quantum yield can be misleading for solid-state luminescence intensity.
Purpose of the Study:
- To evaluate the reliability of quantum yield for assessing luminescence intensity in solid-state lanthanide coordination polymers.
- To establish luminance measurement as a mandatory quantitative method for luminescence intensity.
- To introduce a home-made setup for reproducible luminance measurements.
Main Methods:
- Comparison of luminescence intensity using quantum yield, calculated brightness, and direct luminance measurements.
- Development and detailed description of a home-made setup for reproducible luminance measurements.
- Measurement of luminance for lanthanide-based coordination polymers with benzene-poly-carboxylate ligands.
Main Results:
- Quantum yield does not correlate with luminescence intensity in solid-state compounds; high quantum yield can indicate poor luminescence.
- Calculated brightness is suitable for infrared luminescence but requires similar colorimetric coordinates for visible light comparison.
- Luminance measurement is the most effective method for comparing luminescence intensities across different emission colors.
Conclusions:
- Luminance measurement is indispensable for quantitative assessment of luminescence intensity in lanthanide coordination polymers.
- A novel, reproducible setup for luminance measurement is presented.
- The study suggests a standard for calibration in luminance measurements of these materials.
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