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Fluorescent trifluoromethylated imidazo[1,5-a]pyridines and their application in luminescent down-shifting conversion
- Publication Year :
- 2022
-
Abstract
- In the last few years, imidazo [1,5-a] pyridine derivatives have attracted growing attention due to their unique optical behaviours. Herein, a series of trifluoromethylated substituted imidazo [1,5-a] pyridine derivatives were synthesized and their optical properties investigated. Depending on the position of the trifluoromethylated substituents on the imidazo [1,5-a] pyridine nucleus, we were able to tune the quantum yields (Φ) both in acetonitrile solution (from 13% to 39%) and in the polymeric matrix (10%–58%) with a remarkable large Stokes shift. The investigated fluorophores were dispersed in a transparent polyurethane resin, providing a possible luminescent low-cost material for down-shifting conversion. An analysis based on the chemical structures and spectroscopic data, both in solution and polymeric medium, is reported to address the best strategies to optimize the photophysical properties and prevent aggregation. Finally, optimized polyurethane-based films prepared with compounds 2 and 3 were tested as a luminescent coating on a commercial photodiode, enabling their technological application.
- Subjects :
- Materials science
Luminescence
Down-shifting
Biophysics
engineering.material
Solar conversion
imidazo[1
Biochemistry
law.invention
Large Stokes shift
chemistry.chemical_compound
symbols.namesake
Coating
law
Stokes shift
Pyridine
Acetonitrile
Polyurethane
Solar cell
General Chemistry
5-a]pyridine
Condensed Matter Physics
Combinatorial chemistry
Fluorescence
Atomic and Molecular Physics, and Optics
Photodiode
chemistry
imidazo[1,5-a]pyridine
engineering
symbols
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....87bdde500a24436e0a1270337e2d3407