Projets par an
Résumé
Fluorescent proteins (FPs) are biotags of choice for second-harmonic imaging microscopy (SHIM). Because of their large size, computing their second-harmonic generation (SHG) response represents a great challenge for quantum chemistry. In this contribution, we propose a new all-atom quantum mechanics methodology to compute SHG of large systems. This is now possible because of two recent implementations: the tight-binding GFN2-xTB method to optimize geometries and a related version of the simplified time-dependent density functional theory (sTD-DFT-xTB) to evaluate quadratic response functions. In addition, a new dual-threshold configuration selection scheme is introduced to reduce the computational costs while retaining overall similar accuracy. This methodology was tested to evaluate the SHG of the proteins iLOV and bacteriorhodopsin (bR). In the case of bR, quantitative agreement with respect to experiment was reached for the out-of-resonance low-energy part of the βHRS frequency dispersion. This work paves the way toward an accurate prediction of the SHG of large structures-a requirement for the design of new and improved SHIM biotags.
langue originale | Anglais |
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Pages (de - à) | 9684-9690 |
Nombre de pages | 7 |
journal | The Journal of Physical Chemistry Letters |
Volume | 12 |
Numéro de publication | 39 |
Les DOIs | |
Etat de la publication | Publié - 7 oct. 2021 |
Empreinte digitale
Examiner les sujets de recherche de « All-Atom Quantum Mechanical Calculation of the Second-Harmonic Generation of Fluorescent Proteins ». Ensemble, ils forment une empreinte digitale unique.Projets
- 2 Terminé
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CÉCI – Consortium des Équipements de Calcul Intensif
Champagne, B., Lazzaroni, R., Geuzaine , C., Chatelain, P. & Knaepen, B.
1/01/18 → 31/12/22
Projet: Recherche
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Dynamical nonlinear optical systems: a multiscale theoretical chemistry investigation
1/09/15 → 1/09/21
Projet: Projet de thèse
Équipement
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Plateforme Technologique Calcul Intensif
Benoît Champagne (!!Manager)
Plateforme technologique Calcul intensifEquipement/installations: Plateforme technolgique
Activités
- 2 Présentation orale
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All-Atom Quantum Mechanical Calculation of the Second Harmonic Generation of Fluorescent Proteins
Pierre Beaujean (Orateur)
29 août 2022Activité: Discours ou présentation › Présentation orale
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All-Atom Quantum Mechanical Calculation of the Second-Harmonic Generation of Fluorescent Proteins
Pierre Beaujean (Orateur)
19 nov. 2021Activité: Discours ou présentation › Présentation orale
Thèses de l'étudiant
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Quantum Chemistry Investigations on Nonlinear Optical Materials: from Reference to Complex Systems
Auteur: Beaujean, P., 7 oct. 2021Superviseur: CHAMPAGNE, B. (Promoteur), DEPARIS, O. (Président), DE WERGIFOSSE, M. (Jury), Liegeois, V. (Jury), Vercauteren, D. (Jury), Castet, F. (Personne externe) (Jury) & Sanguinet, L. (Personne externe) (Jury)
Student thesis: Doc types › Docteur en Sciences
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