Table 1.
Physical properties of TRIP derivatives.
| Compound | 15N chemical shift (ppm)b | Epc (V vs SCE) | λ, nm (ε, M−1cm−1) | λ, nm (Φ, %) |
τ (μs) | τN2d (μs) |
|---|---|---|---|---|---|---|
| TRIP-1a | 223.7 | −1.25 | 230 (39900 ± 2000), 261 (44800 ± 2200), 282 (33800 ± 1600), 306 (21000 ± 900), 369 (2000 ± 100)c | 505 (3.1 ± 0.3)c | 1.1c | 3.5 |
| TRIP-2a | 222.3 | −1.18 | 270 (46600 ± 1200), 301 (16200 ± 300), 364 (3000 ± 100) | 512 (5.3 ± 0.4) | 1.8 | 10.9 |
| TRIP-3a | 225.8 | −1.18 | 244 (31000 ± 700), 260 (39100 ± 1800), 306 (17200 ± 700), 317 (16500 ± 1400), 332 (6100 ± 400) | 523 (6.3 ± 0.2) | 0.7 | 1.0 |
| TRIP-4a | 217.6 | −1.30 | 244 (34400 ± 700), 261 (43200 ± 900), 303 (18600 ± 400), 314 (18400 ± 400), 333 (6800 ± 200) | 516 (6.7 ± 0.1) | 0.8 | 1.3 |
| TRIP-5a | 201.8 | −1.33 | 223 (33900 ± 2100), 260 (41200 ± 2500), 303 (14100 ± 800), 332 (6600 ± 400) | 525 (3.9 ± 0.3) | 0.4 | 0.7 |
| TRIP-6a | 236.8 | −0.75 | 260 (35600 ± 1700), 297 (17800 ± 600), 324 (11900 ± 700), 365 (3800 ± 100) | 584 (0.8 ± 0.1) | 0.1 | 0.1 |
| TRIP-7a | n.d. | −1.30 | 260 (44200 ± 1200), 304 (19800 ± 100), 315 (18800 ± 900), 334 (7300 ± 100) | 518 (7.7 ± 0.2) | 0.7 | 1.6 |
| TRIP-1b | n.d. | −1.28 | 259 (39100 ± 1600), 283 (31200 ± 1200), 305 (19400 ± 900), 370 (2000 ± 300) | 503 (2.7 ± 0.3) | 1.2 | 6.8 |
| TRIP-1c | n.d. | −1.27 | 261 (36100 ± 800), 283 (29600 ± 500), 305 (18900 ± 800), 367 (2500 ± 60) | 504 (1.6 ± 0.1) | 1.1 | 5.3 |
| TRIP-1d | n.d. | −1.26 | 268 (58200 ± 1700), 283 (46700 ± 1700), 306 (27900 ± 900), 2369 (600 ± 300) | 506 (2.8 ± 0.3) | 1.0 | 4.0 |
| TRIP-1e | n.d. | −1.29 | 264 (44400 ± 2300), 284 (34600 ± 1700), 305 (21400 ± 1200), 369 (2000 ± 30) | 501 (2.3 ± 0.1) | 1.3 | 5.6 |
a
n.d. = not determined.
b
Referenced to the internal standard acetonitrile at 240 ppm vs. liquid NH3 at 0 ppm.
c
Reported in reference 69.
d
Luminescence lifetime measured in nitrogen-saturated PBS (pH 7.4).