The TDDFT Excitation Energies of the BODIPYs; The DFT and TDDFT Challenge Continues

Adrien Schlachter (1) , Alexandre Fleury (1) , Kevin Tanner (1) , Armand Soldera (1) , Benoit Habermeyer (2, 3) , Roger Guilard (2, 3) , Pierre D Harvey (1)

1 UdeS - Université de Sherbrooke
2 PorphyChem SAS - Porphychem Company
3 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

The derivatives of 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) are pivotal ingredients for a large number of functional, stimuli-responsive materials and therapeutic molecules based on their photophysical properties, and there is a urgent need to understand and predict their optical traits prior to investing a large amount of resources in preparing them. Density functional theory (DFT) and time-dependent DFT (TDDFT) computations were performed to calculate the excitation energies of the lowest-energy singlet excited state of a large series of common BODIPY derivatives employing various functional aiming at the best possible combination providing the least deviations from the experimental values. Using the common “fudge” correction, a series of combinations was investigated, and a methodology is proposed offering equal or better performances than what is reported in the literature.

Mots clés: BODIPY; DFT; TDDFT

Domaines: Chimie organique; Chimie théorique et/ou physique

Adrien Schlachter, Alexandre Fleury, Kevin Tanner, Armand Soldera, Benoit Habermeyer, et al.. The TDDFT Excitation Energies of the BODIPYs; The DFT and TDDFT Challenge Continues. Molecules, 2021, 26 (6), pp.1780. ⟨10.3390/molecules26061780⟩. ⟨hal-03829579⟩