Table 1.
15N chemical shifts of the photo-CIDNP signals in comparison with published chemical shift data
| Assignment |
Solution data |
PS1 |
PS2 |
|
|---|---|---|---|---|
| Cofactor | Atom | σliq* | σsolid† | σsolid† |
| Chl a | N-I | 186.0 | 186.2 (e) | |
| 190.9 (a) | ||||
| N-II | 206.5 | 206.1 (a) | 211.5 (e) | |
| 211.5 (e) | ||||
| N-III | 189.4 | 193.2 (a) | 195.3 (e) | |
| N-IV | 247.0 | 233.3 (a) | 247.6 (e) | |
| 250.3 (e) | ||||
| 254.9 (e) | ||||
| Phe a | N-I | 125.5 | — | |
| N-II | 241.5 | — | ||
| N-III | 133.9 | — | 138.3 (e) | |
| N-IV | 295.8 | — | 295.0 (e) | |
All chemical shifts are referenced to liquid ammonia with use of an external standard of solid 15NH4NO3 (δ = 23.5). a, absorptive (positive); e, emissive (negative).
*Chemical shift in ppm. Measured in CDCl3. Source: ref. 19.
†Chemical shift in ppm. Source: this work.