TABLE 5. Spectral Overlap of the LH2 QX and QY Absorption Bands from Rb. sphaeroides 2.4.1 with Representative S1 (21Ag−) → S0 (11Ag−) and S2 (11Bu+) → S0 (11Ag-) Fluorescence Spectra of the Cars at 293 Ka.
| Car (S1 → S0) and BChl a (QY) |
Car (S2 → S0) and BChla (QX) |
|||
|---|---|---|---|---|
| carotenoid | B800 | B850 | from Figure 13B | from Figure 13C |
| neurosporene | 2.0 | 2.8 | 0.94 | 1.6 |
| spheroidene | 1.1 | 2.2 | 2.0 | 2.8 |
| spheroidenone | 0.78 | 1.8 | 2.9 | 2.5 |
| rhodopin glucoside | 0.56 | 1.3 | 2.3 | 3.1 |
a
The S1 (21Ag−) energies were determined by the S1 (21Ag−) → S2 (11Bu+) transition from NIR transient absorption measurements.