Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Summarized photophysical characterization of coumarin-3-carboxamide derivatives in acetonitrile (ACN). a Maximum absorption wavelength; b Molar extinction coefficient at λmax; c fluorescence quantum yield.
| Compound | λabs (nm) | λem (nm) | ε b (cm−1M−1) | Φ c (×10−4) |
|---|---|---|---|---|
| 3a | 285 a, 310 | 408 | 10,908 | 1.62 |
| 3b | 285 a, 315 | 403 | 7501 | 2.05 |
| 3c | 280 a, 320 | 400 | 7973 | 0.361 |
| 3d | 285 a, 315 | 405 | 10,414 | 3.51 |
