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Calculations of n→π* Transition Energies
Title Calculations of n→π* Transition Energies Subtitle comparisons between TD-DFT, ADC, CC, CASPT2, and BSE/GW descriptions Author info Cloé Azarias ... [et al.] Author Azarias Cloe (20%)
Co-authors Habert Chloé (16%)
Budzák Šimon 1982- (16%) UMBFP08 - Katedra chémie
Blase Xavier (16%)
Duchemin Ivan (16%)
Jacquemin Denis (16%)
Source document The Journal of Physical Chemistry A. Vol. 121, no. 32 (2017), pp. 6122-6134. - Washington : The American Chemical Society, 2017 Keywords transition energies prechodové energie TDDFT BSE/GW Language English Country United States of America Annotation Using a large panel of theoretical approaches, namely, CC2, CCSD, CCSDR(3), CC3, ADC(2), ADC(3), CASPT2, time-dependent density functional theory (TD-DFT), and BSE/evGW, the two latter combined with different exchange-correlation functionals, we investigate the lowest singlet transition in 23 n ->pi* compounds based on the nitroso, thiocarbonyl, carbonyl, and diazo chromophores. First, for 16 small derivatives we compare the transition energies provided by the different wave function approaches to define theoretical best estimates. For this set, it surprisingly turned out that ADC(2) offers a better match with CC3 than ADC(3). Next, we use 10 functionals belonging to the "LYP" and "M06" families and compare the TD-DFT and the BSE/evGW descriptions. The BSE/evGW results are less sensitive than their TD-DFT counterparts to the selected functional, especially in the M06 series. Nevertheless, BSE/evGW delivers larger errors than TD-CAM-B3LYP, which provides extremely accurate results in th Public work category ADC No. of Archival Copy 41298 Repercussion category ZIAEI, Vafa - BREDOW, Thomas. Simple many-body based screening mixing ansatz for improvement of GW/Bethe-Salpeter equation excitation energies of molecular systems. In Physical review B. ISSN 2469-9950, 2017, vol. 96, no. 19.
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