Photophysical properties of monoadducts 2a–d, biadducts 3a–c, and polymeric materials Ac-His-6-MBHA-1d and Ac-His-6-MBHA-1e.
| |||||
|---|---|---|---|---|---|
| Compd | Solutiona | Solidb | |||
| λ ab (nm) | λ em c (nm) | PLQY (%) | λ em (nm)d | PLQY (%) | |
| 2a | 266, 320 | 423 | 0.7 | 428 | 15 |
| 2b | 263, 315 | 404 | 4.4 | 454 | 15 |
| 2c | 264, 318 | 406 | 0.3 | 438 | 11 |
| 2de | 260, 318 | 430 | 1.1 | 465 | 23 |
| 3a | 270, 325 | 437 | 0.8 | 465 | 12 |
| 3b | 260, 318 | 420 | 1.1 | 490 | 10 |
| 3c | 265, 320 | 420 | 1.0 | 520 | 12 |
| Ac-His-6-MBHA-1d | 265, 319 | 425 | 1.5 | 570f | 3 |
| Ac-His-6-MBHA-1e | 260, 329 | 470 | 0.2 | 570f | 7 |
a
Methanol.
b
Powders.
c
λ exc = 320 nm.
d
λ exc = 340 nm.
e
Compound 2d was synthesized as a model compound from 2b as described in the Experimental section.
f
λ exc = 460 nm.