Table 1 The λ max and molar absorptivities of different classes of compounds
S.N | Matrix classes | Structure | λmax (nm) | єa | Log є |
|---|---|---|---|---|---|
| Â | Class (I) Benzimidazole derivatives |
| Â | Â | Â |
1. | 4-(1H-Benzimidazol-2-yl)phenol |
| 299 | 19041 | 4.3 |
2. | 5-(1H-Benzimidazol-2-yl)-2-ethoxyphenol hydrate |
| 229 | 16437 | 4.2 |
3. | 2-(3-Chlorophenyl)-1H-benzimidazole |
| 298 | 10987 | 4.0 |
4. | 2-(1-Naphthyl)-1H-benzimidazole |
| 230 | 13705 | 4.1 |
5. | 2-(3,4-Dimethoxyphenyl)-1-phenyl-1H- benzimidazole |
| 223 | 24942 | 4.4 |
6. | 2-(1H-Benzimidazol-2-yl)-5-hydroperoxyphenol |
| 315 | 20238 | 4.3 |
7. | 2-(4-Isopropylphenyl)-1H-benzimidazole |
| 298 | 19812 | 4.3 |
8. | 3-(1H-Benzimidazol-2-yl) phenol |
| 213 | 7143 | 3.8 |
9. | 2-(1H-Benzimidazol-2-yl)-4-chlorophenol |
| 214 | 9313 | 4.0 |
10. | 2-(4-Ethoxyphenyl)-1H-benzimidazole |
| 298 | 14002 | 4.1 |
11. | N, N-Dimethyl-4-(1-phenyl-1H-benzimidazol-2-yl) aniline |
| 325 | 28295 | 4.4 |
12. | 2-(3,4-Dimethoxyphenyl)-1H-benzimidazole |
| 298 | 15107 | 4.2 |
13. | 2-(3,4-Dichlorophenyl)-1H-benzimidazole |
| 309 | 17452 | 4.2 |
14. | 2-(1H-Benzimidazol-2-yl)-1,4-benzenediol |
| 213 | 13545 | 4.1 |
| Â | Class-11 (Coumarin derivative) |
| Â | Â | Â |
15. | 3-[(5-Methyl-2-furyl)methylidene]-2H-chromene-2,4-dione |
| 213 | 16009 | 4.2 |
16. | 3-[(2-Bromophenyl)methyl idene]-2H-chromene-2,4-dione |
| 213 | 10209 | 4.0 |
17. | 3-[(2-Nitrophenyl)methyl idene]-2H-chromene-2,4-dione |
| 214 | 16985 | 4.2 |
18. | 3-[(2,4-Dihydroxy phenyl)methylidene]-2H-chromene-2,4-dione |
| 212 | 15120 | 4.2 |
19. | 3-[2-Furylmethylidene]-2H-chromene-2,4-dione |
| 214 | 16067 | 4.2 |
20. | 3-[(2,3,4-Trihydroxyphenyl) methyl idene]-2H-chromene-2,4-dione |
| 213 | 16720 | 4.2 |
21. | 3-[(2-Ethoxyphenyl)methyl idene]-2H-chromene-2,4-dione |
| 213 | 23618 | 4.4 |
22. | 3-[(2-Hydroxy-3-methoxy phenyl)methylidene]-2H-chromene-2,4-dione |
| 214 | 11682 | 4.1 |
23. | 3-[(2-Fluorophenyl) methylidene]-2H-chromene-2,4-dione |
| 213 | 13596 | 4.1 |
24. | 3-[(3-Fluorophenyl) methylidene]-2H-chromene-2,4-dione |
| 279 | 21981 | 4.3 |
25. | 3-[(4-Hydroxyphenyl)methyl idene]-2H-chromene-2,4-dione |
| 298 | 16720 | 4.2 |
26. | 4-Methyl-2H-chromen-2-one |
| 324 | 5779 | 3.8 |
| Â | Class-III (Flavones) |
| Â | Â | Â |
27. | 7-Hydroxy-2-phenyl-4H-chromen-4-one |
| 306 | 17642 | 4.2 |
28. | 5-Methyl-2-phenyl-4H-chromen-4-one |
| 261 | 15211 | 4.2 |
29. | 5,7-Dihydroxy-2-phenyl-4H-chromen-4-one |
| 268 | 22629 | 4.4 |
30. | 2-(3,4-Dimethoxyphenyl)-4H-chromen-4-one |
| 334 | 17175 | 4.2 |
31. | 2-(3,4-Dimethoxyphenyl)-7-methyl-4H-chromen-4-one |
| 334 | 14432 | 4.1 |
