Tuning the Organogelating and Spectroscopic Properties of a C3‐Symmetric Pyrene‐Based Gelator through Charge Transfer
| Autor: | Marc Sallé, Matthieu Raynal, Flavia Pop, Laurent Bouteiller, Narcis Avarvari, David Canevet, Cristina Oliveras-González, Adrian Gainar, Mathieu Linares, Benjamin Isare, Thanh-Loan Lai |
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| Přispěvatelé: | Institut Parisien de Chimie Moléculaire (IPCM), Chimie Moléculaire de Paris Centre (FR 2769), Institut de Chimie du CNRS (INC)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), MOLTECH-Anjou, Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Linköping University (LIU) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Phase transition
Absorption spectroscopy Dopant 010405 organic chemistry Chemistry Organic Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry General Chemistry Electron 010402 general chemistry 01 natural sciences Acceptor Catalysis 0104 chemical sciences Condensed Matter::Soft Condensed Matter [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Condensed Matter::Materials Science Atomic electron transition Chemical physics Density functional theory Soft matter |
| Zdroj: | Chemistry-A European Journal Chemistry-A European Journal, Wiley-VCH Verlag, 2021, 27 (7), pp.2410-2420. ⟨10.1002/chem.202003914⟩ |
| ISSN: | 0947-6539 1521-3765 |
| DOI: | 10.1002/chem.202003914⟩ |
| Popis: | International audience; Two-component organogels and xerogels based on a C3-symmetric pyrene-containing gelator have been deeply characterized through a wide range of techniques. Based on the formation of charge transfer complexes, the gelation phenomenon proved to be highly dependent on the nature of the electron poor dopant. This parameter significantly influenced the corresponding gelation domains, the critical gelation concentrations of acceptor dopants, the gel-to-sol transition temperatures, the microstructures formed in the xerogel state and their spectroscopic properties. In particular, titrations and variable-temperature UV-visible absorption spectroscopy demonstrated the key role of donor-acceptor interactions with a remarkable correlation between the phase transition temperatures and the disappearance of the characteristic charge transfer bands. The assignment of these electronic transitions was confirmed through time-dependent density functional theory (TD-DFT) calculations. Eventually, it was shown that the luminescent properties of these materials can be tuned with the temperature, either in intensity or emission wavelength. |
| Databáze: | OpenAIRE |
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