Table 1. Quantum yield and excited-state lifetime of modified h-Telo DNA 5 and TERRA 9 GQs and corresponding duplexes in different ionic conditions.
| Sample | λem (nm) | Φa | τ1b (ns) | τ2b (ns) | τavea (ns) |
|---|---|---|---|---|---|
| 1 in water (72) | 446 | 0.19 | 2.38 | – | 2.38 |
| 2 in water (71) | 447 | 0.21 | 2.55 | – | 2.55 |
| 5 in KCl | 435 | 0.11 | 0.74 (0.81) | 4.03 (0.19) | 1.40 |
| 5•8 in KCl | 430 | 0.03 | 0.56 (0.98) | 5.10 (0.02) | 0.64 |
| 5 in NaCl | 430 | 0.25 | 1.89 (0.58) | 4.50 (0.42) | 3.00 |
| 5•8 in NaCl | 430 | 0.03 | 0.57 (0.98) | 5.27 (0.02) | 0.66 |
| 9 in KCl | 440 | 0.19 | 1.53 (0.66) | 5.37 (0.34) | 2.80 |
| 9•8 in KCl | 440 | 0.04 | 0.56 (0.98) | 5.42 (0.02) | 0.65 |
| 9 in NaCl | 440 | 0.18 | 1.67 (0.67) | 5.67 (0.33) | 2.90 |
| 9•8 in NaCl | 440 | 0.04 | 0.58 (0.98) | 5.30 (0.02) | 0.67 |
aStandard deviations for quantum yield (Φ) and average lifetime (τav) are ≤0.001 and ≤0.05 ns, respectively.
bRelative amplitude is given in parenthesis.