| Autor: |
Masayori Hagimori, Ho-Hsiang Wei, Chen-Kuen Tai, Tzenge-Lien Shih, Shinich Kawashima, Keisuke Kawashima, Naoko Mizuyama, Kenichirou Yokota, Bo-Cheng Wang, Zhi-Shuan Huang, Shih-Chun Tseng, Jian-Wei Lu, Yoshinori Tominaga, Kuen-Da Wu, Mika Suzuta, Yasuhisa Nishimura, San-Lang Wang, Chieh-Yu Chen |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Dyes and Pigments. 92:1069-1074 |
| ISSN: |
0143-7208 |
| Popis: |
One-pot synthesis of a new 2-pyrone dye ( 3a ) by the reaction of 4-diethylamino-acetophenone ( 1 ) with methyl 2-cyano-3,3-bis(methylsulfanyl)acrylate ( 2 ) in the presence of sodium hydroxide as the base was carried out in DMSO. Compound 4a was synthesized by the replacement of methylsulfanyl group of 3a with dimethylamine at 4-position of pyrone ring. Similarly, compound 5a was prepared via the reaction of 3a with diethyl malonate. Compounds 3a–5a exhibited the following fluorescence in the solid state: red ( 3a ), green ( 4a ), and orange ( 5a ). In addition, it was revealed that 2-pyrone dyes exhibit fluorescence in various solvents and show positive solvatochromism. Compounds 3a and 5a exhibited intense fluorescence in chloroform and dichloromethane (fluorescence quantum yield Φ : 0.94–0.95). In contrast, compound 4a exhibited intense fluorescence in polar solvents (methanol: Φ = 0.92). These 2-pyrone dyes have the potential for applications in various fields. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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