Multireference electron correlation methods: Journeys along potential energy surfaces

JW Park, R Al-Saadon, MK MacLeod… - Chemical …, 2020 - ACS Publications
Multireference electron correlation methods describe static and dynamical electron
correlation in a balanced way and, therefore, can yield accurate and predictive results even …

QUESTDB: A database of highly accurate excitation energies for the electronic structure community

M Véril, A Scemama, M Caffarel… - Wiley …, 2021 - Wiley Online Library
We describe our efforts of the past few years to create a large set of more than 500 highly
accurate vertical excitation energies of various natures (π→ π*, n→ π*, double excitation …

A mountaineering strategy to excited states: Highly accurate reference energies and benchmarks

PF Loos, A Scemama, A Blondel… - Journal of chemical …, 2018 - ACS Publications
Striving to define very accurate vertical transition energies, we perform both high-level
coupled cluster (CC) calculations (up to CCSDTQP) and selected configuration interaction …

A mountaineering strategy to excited states: Highly accurate energies and benchmarks for medium sized molecules

PF Loos, F Lipparini, M Boggio-Pasqua… - Journal of Chemical …, 2020 - ACS Publications
Following our previous work focusing on compounds containing up to 3 non-hydrogen
atoms [J. Chem. Theory Comput. 2018, 14, 4360–4379], we present here highly accurate …

Assessing the performances of CASPT2 and NEVPT2 for vertical excitation energies

R Sarkar, PF Loos, M Boggio-Pasqua… - Journal of Chemical …, 2022 - ACS Publications
Methods able to simultaneously account for both static and dynamic electron correlations
have often been employed, not only to model photochemical events but also to provide …

The quest for highly accurate excitation energies: A computational perspective

PF Loos, A Scemama, D Jacquemin - The journal of physical …, 2020 - ACS Publications
We provide an overview of the successive steps that made it possible to obtain increasingly
accurate excitation energies with computational chemistry tools, eventually leading to …

Reference energies for double excitations

PF Loos, M Boggio-Pasqua, A Scemama… - Journal of chemical …, 2019 - ACS Publications
Excited states exhibiting double-excitation character are notoriously difficult to model using
conventional single-reference methods, such as adiabatic time-dependent density functional …

How accurate are TD‐DFT excited‐state geometries compared to DFT ground‐state geometries?

J Wang, B Durbeej - Journal of Computational Chemistry, 2020 - Wiley Online Library
In this work, we take a different angle to the benchmarking of time‐dependent density
functional theory (TD‐DFT) for the calculation of excited‐state geometries by extensively …

Mountaineering strategy to excited states: Highly accurate energies and benchmarks for exotic molecules and radicals

PF Loos, A Scemama, M Boggio-Pasqua… - Journal of chemical …, 2020 - ACS Publications
Aiming at completing the sets of FCI-quality transition energies that we recently developed
(J. Chem. Theory Comput. 2018, 14, 4360–4379, ibid. 2019, 15, 1939–1956, and ibid. 2020 …

Cross-comparisons between experiment, TD-DFT, CC, and ADC for transition energies

C Suellen, RG Freitas, PF Loos… - Journal of Chemical …, 2019 - ACS Publications
Considering 41 electronic transitions in small-and medium-sized organic molecules, we
benchmark the performances of 36 hybrid functionals within time-dependent density …