Strategies to increase the quantum yield: Luminescent methoxylated imidazo[1,5-a]pyridines
| Autor: | Marco Giordano, Giorgio Volpi, Enrico Casamassa, Claudio Garino, Guido Viscardi, Elisa Fresta, Claudia Barolo |
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| Rok vydání: | 2021 |
| Předmět: |
Luminescence
General Chemical Engineering Chemical structure Quantum yield 02 engineering and technology 010402 general chemistry 01 natural sciences Fluorescence Large Stokes shift symbols.namesake chemistry.chemical_compound Computational chemistry Stokes shift Pyridine Molecular orbital Imidazo[1 Process Chemistry and Technology 5-a]pyridine 021001 nanoscience & nanotechnology 0104 chemical sciences 3. Good health Down shifting Imidazo[1 5-a]pyridine Methoxylated chemistry symbols Density functional theory 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 192:109455 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2021.109455 |
| Popis: | A series of methoxylated imidazo[1,5-a]pyridines is presented and their optical and electrochemical properties investigated and interpreted on the basis of density functional theory calculations. The photophysical properties are discussed in relation to the chemical structure. The key role of the 1,3 substitutions on the imidazo[1,5-a]pyridine nucleus on rotational barriers and on frontier molecular orbitals is discussed in relation to the experimental hyperchromic effect, photoemission quantum yield and electrochemical properties. Depending on the position of the introduced methoxy substituents on the imidazo[1,5-a]pyridine nucleus, we are able to tune the Stokes shift and to increase the emission quantum yield from 22% to 50%. |
| Databáze: | OpenAIRE |
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