Dimeric aza-BODIPY and Dichloro-aza-BODIPY: A DFT Study

Year 2022, , 388 - 402, 01.06.2022

Mehmet Emin Çınar

https://doi.org/10.35378/gujs.846075

Cited By: 1

Abstract

Density functional theory (DFT) computations were performed to unveil the electronic structures and the Kohn-Sham Molecular Orbitals (MOs) of the dimeric aza-BODIPY molecule and its chlorinated form. The optimized conformation of dimers is well in alignment with the one provided in the literature. The HOMO LUMO gap of dichloro-derivative is smaller than that of the dimeric aza-BODIPY molecule by 35.0 meV. The predicted HOMO energies of -6.40 and -6.60 eV point out the good stabilities of both compounds. They were reported to demonstrate bathochromic shifts of 40 and 57 nm compared to their monomers substituted by H and Cl, respectively. The intriguing photophysical behaviors of these molecules were investigated by conducting the Tamm-Dancoff density functional theory (TDA-DFT) calculations. The max values emerge from the HOMO-1 -> LUMO+1 (83-86%) transitions, whereas the low energy transitions arise from HOMO -> LUMO (89%). Therefrom predicted ELUMO->HOMO of the dimeric aza-BODIPY and dichloro-derivative are 1.89 and 1.87 eV, respectively, which are matching well with the reported literature values.

Keywords

Dimeric aza-BODIPY, Computation, (TDA)-DFT, NBO Analysis, Optoelectronic property

Thanks

MEC is indebted to Dipl. Chem. R. Breuer for his helps during (TDA)-DFT computations. MEC thanks Prof. Dr. A. Gul at the Istanbul Technical University for his inspiring work. The High-Performance-Computing (HPC) Linux Cluster HorUS of the University of Siegen is gratefully acknowledged for computational resources.

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