{"title":"丙酮光化学中添加剂的自由基清除和激发态猝灭效率","authors":"G. Lendvay, T. Bérces","doi":"10.1016/0047-2670(87)87042-9","DOIUrl":null,"url":null,"abstract":"<div><p>The effect of hydrogen sulphide, ethanethiol, diethyl sulphide and diethylhydroxylamine on the gas phase photolysis of acetone has been studied. Diethylhydroxylamine was found to be much more reactive than thiols and thioethers towards the nπ<sup>*</sup> triplet state of acetone. However, H<sub>2</sub>S and C<sub>2</sub>H<sub>5</sub>SH proved to be more effective methyl-radical trapping agents than diethylhydroxylamine. The following kinetic data were determined for hydrogen-atom abstractions by CH<sub>3</sub> from C<sub>2</sub>H<sub>5</sub>SH and (C<sub>2</sub>H<sub>5</sub>)<sub>2</sub>NOH respectively: <figure><img></figure> These data were used to characterize the radical scavenging efficiencies of the thiol and hydroxylamine compounds, while quenching data indicated the triplet quenching efficiencies of the substrates studied.</p></div>","PeriodicalId":16771,"journal":{"name":"Journal of Photochemistry","volume":"40 1","pages":"Pages 31-45"},"PeriodicalIF":0.0000,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0047-2670(87)87042-9","citationCount":"3","resultStr":"{\"title\":\"Radical scavenging and excited state quenching efficiency of additives in the photochemistry of acetone\",\"authors\":\"G. Lendvay, T. Bérces\",\"doi\":\"10.1016/0047-2670(87)87042-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effect of hydrogen sulphide, ethanethiol, diethyl sulphide and diethylhydroxylamine on the gas phase photolysis of acetone has been studied. Diethylhydroxylamine was found to be much more reactive than thiols and thioethers towards the nπ<sup>*</sup> triplet state of acetone. However, H<sub>2</sub>S and C<sub>2</sub>H<sub>5</sub>SH proved to be more effective methyl-radical trapping agents than diethylhydroxylamine. The following kinetic data were determined for hydrogen-atom abstractions by CH<sub>3</sub> from C<sub>2</sub>H<sub>5</sub>SH and (C<sub>2</sub>H<sub>5</sub>)<sub>2</sub>NOH respectively: <figure><img></figure> These data were used to characterize the radical scavenging efficiencies of the thiol and hydroxylamine compounds, while quenching data indicated the triplet quenching efficiencies of the substrates studied.</p></div>\",\"PeriodicalId\":16771,\"journal\":{\"name\":\"Journal of Photochemistry\",\"volume\":\"40 1\",\"pages\":\"Pages 31-45\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1987-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0047-2670(87)87042-9\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Photochemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0047267087870429\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Photochemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0047267087870429","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Radical scavenging and excited state quenching efficiency of additives in the photochemistry of acetone
The effect of hydrogen sulphide, ethanethiol, diethyl sulphide and diethylhydroxylamine on the gas phase photolysis of acetone has been studied. Diethylhydroxylamine was found to be much more reactive than thiols and thioethers towards the nπ* triplet state of acetone. However, H2S and C2H5SH proved to be more effective methyl-radical trapping agents than diethylhydroxylamine. The following kinetic data were determined for hydrogen-atom abstractions by CH3 from C2H5SH and (C2H5)2NOH respectively: These data were used to characterize the radical scavenging efficiencies of the thiol and hydroxylamine compounds, while quenching data indicated the triplet quenching efficiencies of the substrates studied.
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