Functional and Basis Set Dependence for Time‐Dependent Density Functional Theory Trajectory Surface Hopping Molecular Dynamics: Cis ‐Azobenzene Photoisomerization

2019 ◽  
Vol 41 (7) ◽  
pp. 635-645 ◽  
Author(s):  
Linfeng Ye ◽  
Chao Xu ◽  
Feng Long Gu ◽  
Chaoyuan Zhu
Keyword(s):  
Molecular Dynamics ◽  
Density Functional Theory ◽  
Density Functional ◽  
Time Dependent ◽  
Basis Set ◽  
Functional Theory ◽  
Surface Hopping ◽  
Dependent Density

Benchmark of Simplified Time-Dependent Density Functional Theory for UV-Vis Spectral Properties of Porphyrinoids

2019 ◽  
Author(s):  
Kamal Batra ◽  
Stefan Zahn ◽  
Thomas Heine
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Large Scale ◽  
Absolute Error ◽  
Time Dependent ◽  
Basis Set ◽  
Basis Sets ◽  
Functional Theory ◽  
Framework Materials ◽  
Dependent Density

<p>We thoroughly benchmark time-dependent density- functional theory for the predictive calculation of UV/Vis spectra of porphyrin derivatives. With the aim to provide an approach that is computationally feasible for large-scale applications such as biological systems or molecular framework materials, albeit performing with high accuracy for the Q-bands, we compare the results given by various computational protocols, including basis sets, density-functionals (including gradient corrected local functionals, hybrids, double hybrids and range-separated functionals), and various variants of time-dependent density-functional theory, including the simplified Tamm-Dancoff approximation. An excellent choice for these calculations is the range-separated functional CAM-B3LYP in combination with the simplified Tamm-Dancoff approximation and a basis set of double-ζ quality def2-SVP (mean absolute error [MAE] of ~0.05 eV). This is not surpassed by more expensive approaches, not even by double hybrid functionals, and solely systematic excitation energy scaling slightly improves the results (MAE ~0.04 eV). </p>

Excitation Spectra in the Time-Dependent Density-Functional Theory with Gradient Correction

1999 ◽  
Vol 579 ◽  
Author(s):  
Naoto Uimezawa ◽  
Susumu Saito
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Local Density ◽  
Oscillator Strengths ◽  
Time Dependent ◽  
Basis Set ◽  
Excitation Spectra ◽  
Functional Theory ◽  
Gradient Correction ◽  
Dependent Density

ABSTRACTWe study tile optical absorption spectra of Na clusters using the time-dependent density-functional theory with gradient correction. A jellium-sphere background model, which is free from basis-set incompleteness error and is suitable for the comparison of various theoretical methods, is adopted. For energies of surface-plasinon excitations governing profiles of photoabsorption spectra with huge oscillator strengths., the gradient correction by van Leeiiwen and Baerends with correct asymptotic behavior of the effective potential is found to show considerable improvement over the time-dependent local-density approximation.

Mixed time-dependent density-functional theory/classical trajectory surface hopping study of oxirane photochemistry

2008 ◽  
Vol 129 (12) ◽  
pp. 124108 ◽  
Author(s):  
Enrico Tapavicza ◽  
Ivano Tavernelli ◽  
Ursula Rothlisberger ◽  
Claudia Filippi ◽  
Mark E. Casida
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Classical Trajectory ◽  
Time Dependent ◽  
Functional Theory ◽  
Surface Hopping ◽  
Dependent Density

Time-Dependent Density Functional Theory Molecular Dynamics Simulations of Liquid Water Radiolysis

ChemPhysChem ◽  
2008 ◽  
Vol 9 (14) ◽  
pp. 2099-2103 ◽  
Author(s):  
Ivano Tavernelli ◽  
Marie-Pierre Gaigeot ◽  
Rodolphe Vuilleumier ◽  
Carlos Stia ◽  
Marie-Anne Hervé du Penhoat ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Density Functional Theory ◽  
Molecular Dynamics Simulations ◽  
Liquid Water ◽  
Density Functional ◽  
Time Dependent ◽  
Water Radiolysis ◽  
Functional Theory ◽  
Dynamics Simulations ◽  
Dependent Density
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