Table 2 Predicted excited States of PFOA molecule by TDDFT calculation.

From: Enhanced electrooxidation of per and polyfluoroalkyl substances on Boron doped diamond anode in the presence of vacuum ultraviolet irradiation

S

Excitation energy (nm)

Fa

Transition

1

216.25

0.00090

HOMO-1→LUMO

(48.4%)

HOMO→LUMO

(27.8%)

HOMO-1→LUMO + 2

(12.2%)

HOMO→LUMO + 2

(5.5%)

2

213.33

0.03080

HOMO→LUMO

(51.7%)

HOMO-1→LUMO

(25.6%)

HOMO→LUMO + 2

(9.7%)

HOMO-1→LUMO + 2

(6.6%)

3

183.79

0.01210

HOMO→LUMO + 1

(68.9%)

HOMO-2→LUMO

(13.1%)

HOMO→LUMO + 2

(6.0%)

HOMO→LUMO

(5.4%)

4

176.56

0.02380

HOMO-1→LUMO + 1

(44.2%)

HOMO-2→LUMO

(32.4%)

HOMO→LUMO + 1

(10.5%)

HOMO-1→LUMO + 2

(5.1%)

5

176.31

0.03500

HOMO-2→LUMO

(50.1%)

HOMO-1→LUMO + 1

(36.5%)

HOMO-1→LUMO

(5.4%)

6

169.95

0.03280

HOMO→LUMO + 2

(65.4%)

HOMO→LUMO

(11.3%)

HOMO→LUMO + 1

(11.0%)

7

167.58

0.00940

HOMO-2→LUMO + 1

(78.0%)

HOMO-1→LUMO + 2

(9.9%)

8

166.70

0.01680

HOMO-2→LUMO + 1

(85.5%)

HOMO-1→LUMO + 2

(8.7%)

9

152.89

0.05430

HOMO-2→LUMO + 2

(78.0%)

HOMO→LUMO + 3

(9.9%)

10

147.99

0.02900

HOMO→LUMO + 3

(63.7%)

HOMO-2→LUMO + 2

(8.0%)

HOMO-1→LUMO + 3

(7.8%)

11

144.96

0.01080

HOMO-1→LUMO + 3

(80.4%)

HOMO→LUMO + 3

(6.8%)

12

143.04

0.15260

HOMO-3→LUMO

(77.7%)

HOMO→LUMO + 6

(6.6%)

HOMO→LUMO + 4

(6.3%)

13

150.98

0.01880

HOMO-1→LUMO + 6

(25.6%)

HOMO-1→LUMO + 4

(23.1%)

HOMO-2→LUMO + 3

(14.7%)

HOMO→LUMO + 5

(8.6%)

HOMO→LUMO + 6

(7.6%)

HOMO→LUMO + 4

(5.5%)

14

140.09

0.03220

HOMO→LUMO + 4

(30.2%)

HOMO→LUMO + 6

(26.5%)

HOMO-3→LUMO

(14.5%)

HOMO-1→LUMO + 4

(9.4%)

HOMO-1→LUMO + 6

(9.3%)

15

138.50

0.01600

HOMO-2→LUMO + 3

(51.1%)

HOMO-2→LUMO + 6

(12.6%)

HOMO-3→LUMO + 1

(10.6%)

HOMO→LUMO + 5

(8.6%)

16

137.74

0.03010

HOMO-3→LUMO + 1

(82.1%)

17

136.56

0.00140

HOMO→LUMO + 5

(34.5%)

HOMO-2→LUMO + 6

(25.0%)

HOMO-2→LUMO + 4

(20.7%)

HOMO-2→LUMO + 5

(6.8%)

  1. aThe oscillator strength (F) is a unitless quantity proportional to the molar absorptivity.