Table 2. Fitting Parameters for the SFG Spectra of 1 mM PFOA in D2O at Various pH*s in SSP Polarization with Gamma Reported in FWHM.
| ωi | 1370 cm–1 | 1412 cm–1 | 1705 cm–1 | (νC=O) | |
| Γi | 30 | 45 | 50 | 40 |
| pH* | AR with ANR= 0.07 and φNR= −0.2 | νC=O ωi (cm–1) | |||
|---|---|---|---|---|---|
| 1.2 | 3.7 ± 0.5 | –5.1 ± 0.3 | –3.1 ± 0.8 | 4.4 ± 1.7 | 1768 ± 2 |
| 1.9 | 2.8 ± 0.5 | –8.9 ± 1.4 | –3.7 ± 0.6 | 4.5 ± 0.7 | 1766 ± 1 |
| 2.8 | 1.6 ± 0.2 | –12.7 ± 2.2 | –4.4 ± 0.2 | 3.9 ± 0.5 | 1762 ± 2 |
| 4.1 | 1.2 ± 0.3 | –14.0 ± 1.2 | –4.6 ± 0.2 | 3.1 ± 0.1 | 1758 ± 2 |
| 5.5 | 2.8 ± 0.9 | –14.4 ± 0.9 | –4.0 ± 0.8 | 0 | 0 |
| 7.4 | 1.2 ± 0.2 | –13.2 ± 0.8 | –3.9 ± 0.1 | 0 | 0 |