Table 5 Fluorescence data for 2-aryl imidazo[1,2-a]pyridines 3
From: Fluorescent property of 3-hydroxymethyl imidazo[1,2-a]pyridine and pyrimidine derivatives
R | UV / Vis | Fluorescence | |||
|---|---|---|---|---|---|
Compound | Aryl | Absλ max(nm) | λ ex (nm) | λ em (nm) | I* |
1 | --- | 318 | 320 | 376.0 | 101-9 |
3a | C6H5 | 237 | 240 | 375.6 | 367.8 |
3b | 4’Cl-C6H4 | 245 | 245 | 375.2 | 310.92 |
3c | 4’F-C6H4 | 300 | 300 | 374 | 470.34 |
3e | 4’MeO-C6H4 | 315 | 315 | 381.6 | 407.83 |
3f | 3’,4’diMeO- C6H3 | 228 | 230 | 385.6 | 178.19 |