Table 3 UV spectroscopic results of derivatives (5a-5j):
Sr. No. | Code | λmax. nm | ἐ | λmax. nm | ἐ | λmax. nm | ἐ | Band gap |
|---|---|---|---|---|---|---|---|---|
1 | 5a | 214 | 0.119 | 281 | 0.709 | - | - | 3.93 |
2 | 4b | 259 | 0.304 | 318 | 0.197 | 416 | 0.339 | 2.87 |
3 | 5c | 259 | 0.305 | 320 | 0.199 | 422 | 0.339 | 1.68 |
4 | 5d | 241 | 0.315 | 289 | 0.271 | 399 | 0.251 | 5.86 |
5 | 5e | 210 | 0.332 | 242 | 0.368 | 346 | 0.678 | 3.18 |
6 | 5f | 211 | 0.305 | 244 | 0.491 | 347 | 0.769 | 2.26 |
7 | 5 g | 210 | 0.642 | 242 | 0.668 | 346 | 0.685 | 3.15 |
8 | 5 h | 211 | 0.288 | 244 | 0.486 | 347 | 0.767 | 3.19 |
9 | 5i | - | - | 244 | 0.325 | 364 | 0.558 | 2.89 |
10 | 5j | - | - | 242 | 0.015 | 331 | 0.224 | 5.34 |