Table 1.
Experimental data determined by UV-Vis absorption spectroscopy and by global analysis of the transient absorption spectra.
| Compound | UV-Vis spectroscopy | Transient absorption spectroscopy | |||||
|---|---|---|---|---|---|---|---|
| S0 → Sn (λmain) [nm] |
ΔE (S0 → Sn) [cm−1] |
S0 → S2/3 (λweak) [nm] |
τ1 [ps] | τ2 [ps] | τ3 (Ar) [μs] | τ3 (O2) [ns] | |
| Tr*[4] | 268 | 1987 | 368 | 1.4 | 117.2 | 6.0 | 87.1 |
| Tr*[6] | 310 | 1989 | 443 | 1.8 | 429.9 | 7.9 | 45.8 |
| Tr*[8] | 347 | 1957 | 495 | 2.2 | 487.1 | 4.3 | 59.4 |
| Tr*[10] | 376 | 1894 | 508 | 2.3 | 751.8 | 7.7 | 54.3 |
| Glu[4] | 242 | 1968 | 347 | n.d. | n.d. | n.d. | n.d. |
| Glu[6] | 292 | 1985 | 430 | 8.8 | 307.3 | n.d. | n.d. |
| Glu[8] | 334 | 1907 | 487 | 4.4 | 391.8 | n.d. | n.d. |
| Glu[10] | 367 | 1822 | 523 | 3.2 | 469.6 | n.d. | n.d. |
| Glu[12] | 393 | 1803 | 564 | 2.7 | 1106.4 | n.d. | n.d. |
Data determined for Tr*[n] with n = 4–10 (in hexane) and Glu[n] with n = 4–12 (in DCM), as well as the time constants τ1 (Sn → S1), τ2 (S1 → T1), and τ3 (T1 → S0) obtained by global analysis of the transient absorption data using a convolution of the instrument response function and three exponential functions (n.d. not determined). Source data are provided in the Source Data file.