Table 1.
Spectroscopic properties of [Pt(BDIQQ)]Cl
| Solvent | λmax, nm (ε, M−1 cm−1) | λem, nm (Φ)b | τem (μs) |
|---|---|---|---|
| DMSO | 292 (29 000), 342 (60 000), 377 (14 000), 434 (4700), 518 sh (29 000), 546 (49 000) | Presence of O2: 672 (1.1 × 10−3) | Presence of O2: 0.68 |
| Absence of O2: 672 (1.7 × 10−2) | Absence of O2: 6.9 | ||
| Aqueous buffera | 284 (15 000), 338 (19 000), 428 (6100), 541 (12 000), 563 (12 000) | No DNA: 720, 820 (<1 × 10−4) | No DNA: n.d. |
| Excess DNA: 682 (3.8 × 10−3) | Excess DNA: 0.16, 6.1 |
a
pH 7.4, 10 mM Tris, 10 mM NaCl.
b
Measured relative to [Ru(bpy)3]2+ in aerated water (Φ = 0.04).