Table 1. Computed Total Energies (au) for the Ground State and Excitation Energies (eV)a.
|
S0 (au) |
S1 |
S1 |
||||||
|---|---|---|---|---|---|---|---|---|
| moleculeb | MSDFT | ΔEKS | MSDFT | TDDFT | expc | MSDFT | TDDFT | expc |
| naphthalene | –385.76533 | 0.00000 | 4.75 | 4.78 | 4.7 | 4.81 | 4.89 | 3.97 |
| pentacene | –846.54223 | 0.00000 | 2.25 | 2.32 | 2.3 | 3.29 | 3.47 | |
| PCA | –845.54485 | –0.00007 | 5.25 | 5.29 | 5.08 | 5.83 | 5.83 | 6.41 |
| TCNE | –447.41678 | 0.00000 | 4.75 | 4.85 | 4.75, 4.84 | 5.21 | 5.06 | 5.67 |
| t-DME | –307.51100 | –0.00015 | 6.71 | 6.71 | 6.2 | 7.08 | 6.91 | |
| c-DME | –307.50997 | –0.00028 | 6.39 | 6.42 | 6.16 | 6.82 | 6.73 | |
| MVE | –193.03249 | –0.00043 | 7.06 | 7.19 | 6.48 | 7.44 | 7.42 | 9.6 |
| Me2C=O | –193.07551 | –0.00055 | 4.47 | 4.20 | 4.38 | 7.90 | 8.27 | 6.35 |
| Me2C=O (S1) | –193.04394 | –0.00197 | 2.94 | 2.90 | 3.06 | 6.27 | 6.75 | |
| pentacene (S1) | –846.53459 | 0.00000 | 1.85 | 1.89 | 2.91 | 3.33 | ||
The Minnesota M06-2X density functional is used both in NOSI and TDDFT calculations. Relative energy given in electron volts (eV) between results from MSDFT-NOSI and KS-DFT, ΔEKS = ENOSI – EKSDFT. This is a reasonable indicator of possible double counting of electron correlation for single-reference molecules.
PCA: para-chloromethyl anisole, TCNE: tetracyanoethylene, MVE: methyl vinyl ether, DME: 1,2-dimethoxyethene.