Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts
In the last few years, imidazo[1,5-<i>a</i>]pyridine scaffolds and derivatives have attracted growing attention due to their unique chemical structure and optical behaviors. In this work, a series of pyridylimidazo[1,5-<i>a</i>]pyridine derivatives and their corresponding pyr...
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doaj-8cfc9a5c69aa417093bdce9e13a6a6802021-09-25T23:54:01ZengMDPI AGChemistry2624-85492021-07-0135071472710.3390/chemistry3030050Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium SaltsLuca M. Cavinato0Giorgio Volpi1Elisa Fresta2Claudio Garino3Andrea Fin4Claudia Barolo5Chair of Biogenic Functional Materials, Technical University of Munich, Schulgasse 22, 94315 Straubing, GermanyDepartment of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Turin, ItalyChair of Biogenic Functional Materials, Technical University of Munich, Schulgasse 22, 94315 Straubing, GermanyDepartment of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Turin, ItalyDepartment of Drug Science and Technology, University of Turin, Via Pietro Giuria 9, 10125 Turin, ItalyDepartment of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Turin, ItalyIn the last few years, imidazo[1,5-<i>a</i>]pyridine scaffolds and derivatives have attracted growing attention due to their unique chemical structure and optical behaviors. In this work, a series of pyridylimidazo[1,5-<i>a</i>]pyridine derivatives and their corresponding pyridinium salts were synthesized and their optical properties investigated to evaluate the effect of the quaternization on the optical features both in solution and polymeric matrix. A critical analysis based on the spectroscopic data, chemical structures along with density functional theory calculation is reported to address the best strategies to prevent aggregation and optimize the photophysical properties. The obtained results describe the relationship between chemical structure and optical behaviors, highlighting the role of pendant pyridine. Finally, the presence of a positive charge is fundamental to avoid any possible aggregation process in polymeric films.https://www.mdpi.com/2624-8549/3/3/50blue emitterslarge stokes shiftmicrowave synthesisthin filmimidazo[1,5-<i>a</i>]pyridineacceptor small molecules |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luca M. Cavinato Giorgio Volpi Elisa Fresta Claudio Garino Andrea Fin Claudia Barolo |
spellingShingle |
Luca M. Cavinato Giorgio Volpi Elisa Fresta Claudio Garino Andrea Fin Claudia Barolo Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts Chemistry blue emitters large stokes shift microwave synthesis thin film imidazo[1,5-<i>a</i>]pyridine acceptor small molecules |
author_facet |
Luca M. Cavinato Giorgio Volpi Elisa Fresta Claudio Garino Andrea Fin Claudia Barolo |
author_sort |
Luca M. Cavinato |
title |
Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts |
title_short |
Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts |
title_full |
Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts |
title_fullStr |
Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts |
title_full_unstemmed |
Microwave-Assisted Synthesis, Optical and Theoretical Characterization of Novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium Salts |
title_sort |
microwave-assisted synthesis, optical and theoretical characterization of novel 2-(imidazo[1,5-<i>a</i>]pyridine-1-yl)pyridinium salts |
publisher |
MDPI AG |
series |
Chemistry |
issn |
2624-8549 |
publishDate |
2021-07-01 |
description |
In the last few years, imidazo[1,5-<i>a</i>]pyridine scaffolds and derivatives have attracted growing attention due to their unique chemical structure and optical behaviors. In this work, a series of pyridylimidazo[1,5-<i>a</i>]pyridine derivatives and their corresponding pyridinium salts were synthesized and their optical properties investigated to evaluate the effect of the quaternization on the optical features both in solution and polymeric matrix. A critical analysis based on the spectroscopic data, chemical structures along with density functional theory calculation is reported to address the best strategies to prevent aggregation and optimize the photophysical properties. The obtained results describe the relationship between chemical structure and optical behaviors, highlighting the role of pendant pyridine. Finally, the presence of a positive charge is fundamental to avoid any possible aggregation process in polymeric films. |
topic |
blue emitters large stokes shift microwave synthesis thin film imidazo[1,5-<i>a</i>]pyridine acceptor small molecules |
url |
https://www.mdpi.com/2624-8549/3/3/50 |
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