Table 3.
Lifetimes of the solvated electron in all samples at different pH values
| Molecule | pH | Mean lifetime | Lifetimes and pre-exponential factors for triple exponential global fitting | χ2/DoF | R2 | ||
|---|---|---|---|---|---|---|---|
| τ1 (μs) | τ2 (μs) | τ3 (μs) | |||||
| Tryptophan | 0.17 ±0.01 | 1.11 ±0.045 | 2.93 ±0.07 | 1.4126E-6 | 0.99469 | ||
| 〈τ〉(μs) | α1 | α2 | α3 | ||||
| 4.0 | 1.0 | 0.98 ±0.01 | 0.00 ±0.02 | 0.02 ±0.01 | |||
| 7.5 | 1.1 | 0.05 ±0.02 | 0.95 ±0.02 | 0.00 ±0.03 | |||
| 8.5 | 2.3 | 0.00 ±0.01 | 0.61 ±0.02 | 0.39 ±0.02 | |||
| 10.0 | 2.8 | 0.00 ±0.01 | 0.23 ± 0.03 | 0.77 ±0.02 | |||
| τ1 (μs) | τ2 (μs) | τ3 (μs) | |||||
| Lysozyme | 0.13 ±0.01 | 0.716 ±0.04 | 1.61 ±0.14 | 1.565E-6 | 0.97039 | ||
| 〈τ〉(μs) | α1 | α2 | α3 | ||||
| 4.0 | 0.3 | 0.99 ±0.02 | 0.00 ±0.04 | 0.01 ±0.02 | |||
| 7.5 | 0.7 | 0.03 ±0.03 | 0.97 ±0.04 | 0.00 ±0.05 | |||
| 8.5 | 0.8 | 0.00 ±0.03 | 0.97 ±0.04 | 0.03 ±0.05 | |||
| 10.0 | 1.6 | 0.03 ±0.05 | 0.00 ± 0.15 | 0.97 ±0.12 | |||
| τ1 (μs) | τ2 (μs) | τ3 (μs) | |||||
| Cutinase | 0.15 ±0.01 | 0.97 ±0.07 | 2.11 ±0.13 | 1.0213E-6 | 0.97276 | ||
| 〈τ〉(μs) | α1 | α2 | α3 | ||||
| 4.0 | 0.3 | 1.00 ±0.03 | 0.00 ±0.05 | 0.01 ±0.03 | |||
| 8.5 | 1.0 | 0.00 ±0.03 | 1.00 ±0.06 | 0.00 ±0.07 | |||
| 10.0 | 2.1 | 0.00 ±0.03 | 0.00 ±0.11 | 1.00 ±0.09 | |||
The lifetimes, their normalized weights, and the associated errors were obtained from global fits of the decay data for each molecule. The mean lifetime as a function of pH, as well as goodness-of-fit parameters for each dataset, are presented. The dominant lifetime is in bold.