1
|
de Thieulloy L, Mongin C, Leray I, Guerrin C, Buntinx G, Aloïse S, Perrier A. In silico strategy to design an efficient organic photoswitch based on excited-state cation transfer. Phys Chem Chem Phys 2024; 26:1904-1916. [PMID: 38115702 DOI: 10.1039/d3cp04988d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
A new class of photoswitches and the corresponding elementary photoinduced reaction, the so-called Excited-State Cation Transfer (ESCT), are investigated. This reaction relies on an intramolecular photo-release/photo-complexation of cation: after irradiation, the cation is translocated from a complexation site 1 to a site 2 during the excited state lifetime. Our purpose is thus to develop a computational strategy based on Density Functional theory (DFT) and its time-dependent counterpart (TD-DFT) to improve the different properties of the ESCT photoswitches, namely (i) the ground state complexation constant K, (ii) the excited state complexation constant K*, (iii) the photoejection properties and (iv) the population of the triplet states from a singlet state via intersystem crossing to increase the lifetime of the excited state. In this work, we are interested in optimizing the ESCT properties of a betaine pyridinium chromophore substituted by a 15-aza-5-crown, that was previously shown to efficiently photoeject a Ca2+ cation from the site 1 but no photo-recapture was observed in the site 2 [Aloïse et al., Phys. Chem. Chem. Phys., 2016, 22, 15384]. To this purpose, we have investigated the impact of the modification of the site 1 on the ESCT properties by introducing different substituents (EDG groups, halogen atoms) at different positions. So far, promising systems have been identified but a simultaneous improvement of all the ESCT photoswitches properties has yet not been achieved.
Collapse
Affiliation(s)
- Laure de Thieulloy
- Chimie ParisTech, CNRS, Institute of Chemistry for Life and Health Sciences (i-CLeHS), PSL Research University, F-75005 Paris, France
| | - Cédric Mongin
- ENS Paris-Saclay, CNRS, PPSM, Université Paris-Saclay, 91190, Gif-sur-Yvette, France
| | - Isabelle Leray
- ENS Paris-Saclay, CNRS, PPSM, Université Paris-Saclay, 91190, Gif-sur-Yvette, France
| | - Clément Guerrin
- CNRS, UMR 8516 - LASIRE - LAboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, Univ. Lille, F-59000 Lille, France
| | - Guy Buntinx
- CNRS, UMR 8516 - LASIRE - LAboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, Univ. Lille, F-59000 Lille, France
| | - Stéphane Aloïse
- CNRS, UMR 8516 - LASIRE - LAboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, Univ. Lille, F-59000 Lille, France
| | - Aurélie Perrier
- Chimie ParisTech, CNRS, Institute of Chemistry for Life and Health Sciences (i-CLeHS), PSL Research University, F-75005 Paris, France
- Université Paris Cité, F-75206 Paris, France.
| |
Collapse
|
2
|
Is it possible to ”simply” predict the photoejection of a cation? Example of azacrown-substituted [(bpy)Re(CO)3L]+ complexes. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|