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COSMO-RI-ADC(2) excitation energies and excited state gradients.
- Source :
-
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2018 Jun 20; Vol. 20 (24), pp. 16354-16363. - Publication Year :
- 2018
-
Abstract
- We present an implementation of analytic gradients for electronically excited states for the algebraic-diagrammatic construction through second order, ADC(2), in combination with the conductor-like screening model (COSMO) as an implicit solvent model. The implementation uses a post-SCF reaction field scheme for the coupling between the environment and the quantum system which retains the computational efficiency of the gas-phase RI-ADC(2) calculations. Applying this approach, we computed solvatochromic shifts for UV absorption and fluorescence transitions of 4-(N,N-dimethylamino)benzonitrile using equilibrium geometries for the ground and the first excited states optimized in the presence of acetonitrile as solvent. Furthermore, we investigated the excited state energies and geometries of the 2-iodobenzimidazolium·triflate ion pair in aqueous solution as an example where solvent effects have a large influence on the structure and the UV spectrum.
Details
- Language :
- English
- ISSN :
- 1463-9084
- Volume :
- 20
- Issue :
- 24
- Database :
- MEDLINE
- Journal :
- Physical chemistry chemical physics : PCCP
- Publication Type :
- Academic Journal
- Accession number :
- 29707719
- Full Text :
- https://doi.org/10.1039/c8cp00643a