Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Dynamical Behavior and Second Harmonic Generation Responses in Acido-Triggered Molecular Switches

Abstract : Second-order nonlinear optical molecular switches are systems displaying marked variations of their second harmonic generation (SHG) responses upon external stimulation. In this article, we combine a multiscale computational method and experimental characterizations to provide a full description of the SHG responses of molecular switches built from the association of the indolino-oxazolidine unit to a bithiophene donor. In chloroform solutions, the addition of trifluoroacetic acid triggers the switching from a neutral closed form to a protonated open form, making an ion pair with the trifluoroacetate counterion and induces a strong enhancement of the SHG responses. The numerical simulations (i) evidence how the large and rapid thermally induced geometrical fluctuations lead to broadening the SHG responses distributions, making even difficult the determination of their sign, (ii) rationalize the variations of these responses as a function of the closure/opening of the oxazolidine ring and of the nature of its chemical substitution, and (iii) call into question common assumptions employed when analyzing the experimental SHG responses.
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées

https://hal.univ-angers.fr/hal-02564573
Contributeur : Okina Université d'Angers <>
Soumis le : mardi 5 mai 2020 - 22:14:19
Dernière modification le : jeudi 10 septembre 2020 - 10:44:05

Lien texte intégral

Identifiants

Citation

Kornelia Pielak, Claire Tonnelé, Lionel Sanguinet, Elena Cariati, Stefania Righetto, et al.. Dynamical Behavior and Second Harmonic Generation Responses in Acido-Triggered Molecular Switches. Journal of Physical Chemistry C, American Chemical Society, 2018, 122 (45), pp.26160-26168. ⟨10.1021/acs.jpcc.8b08697⟩. ⟨hal-02564573⟩

Partager

Métriques

Consultations de la notice

20