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Studies on the synthesis and fluorescent properties of long-chained 2-(5-alkyl-1, 3, 4-oxadiazol-2-yl)-3H-benzo(f)chromen-3-ones
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rajesha Naik, Halehatti S. Bhojya Kumar, H. C. Kiran Hosamani, Kallappa M. Mahadevan, Kittappa M. |
| Copyright Year | 2008 |
| Abstract | The synthesis and fluorescent properties of some new benzocoumaryl heterocyclic molecules are presented. Condensation of 2-hydroxy-1-naphthaldehyde with diethyl malonate in the presence of catalytic amount of piperidine in ethanol affords benzocoumarin-3-ethyl carboxylate 2 in fairly good yield (90%). Further the compound 2 on treatment with hydrazine hydrate afforded compound 3 with excellent yield (95%). Thus compounds 4a-e have been obtained by direct cyclization of 3 with various fatty acids in the presence of POCl3. The structures of all newly synthesized compounds were confirmed by IR, 1 H NMR, 13 C NMR and UPLC-Mass spectral data. Fluorescent experimental results revealed remarkable photoluminescence properties. Luminescent properties of all newly synthesized compounds were determined and observed that they exhibited strong blue-green fluorescent properties. The fluorescence spectral properties of compounds 4a-e are similar to each other and the Stoke's shift ranges from 54 to 59 nm. Both the absorption and fluorescence maxima of the benzocoumarin-oxadiazole compounds showed good bathochromic shift. |
| File Format | PDF HTM / HTML |
| DOI | 10.3998/ark.5550190.0010.202 |
| Volume Number | 2009 |
| Alternate Webpage(s) | http://www.arkat-usa.org/get-file/27285/ |
| Alternate Webpage(s) | https://doi.org/10.3998/ark.5550190.0010.202 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
