{"title":"基于双显色模型体系和聚合物构象分析的聚(n -乙烯基咔唑)光物理性质的解释","authors":"J. Vandendriessche, F.C. De Schryver","doi":"10.1016/0144-2880(86)90051-5","DOIUrl":null,"url":null,"abstract":"<div><p>The photophysical properties of poly(N-vinylcarbazole) are interpreted, based on the photophysical properties of the diastereomers of 2,4-di(N-carbazolyl)pentane and a theoretical study of the conformational distribution in the dyads of poly(N-vinylcarbazole). From the conformational distribution in the polymer it is derived that more than 95% of the excitation will occur on a chromophore belonging to an excimer site. Since excimer formation at these excimer sites is very rapid (>10<sup>10</sup> s<sup>−1</sup>), it is concluded that, if energy migration is to be important, the rate constant of energy migration from one chromophore to another should be ⪢10<sup>10</sup> s<sup>−1</sup>.</p></div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-2880(86)90051-5","citationCount":"13","resultStr":"{\"title\":\"An interpretation of the photophysical properties of poly(N-vinylcarbazole) based on bichromophoric model systems and the conformational analysis of the polymer\",\"authors\":\"J. Vandendriessche, F.C. De Schryver\",\"doi\":\"10.1016/0144-2880(86)90051-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The photophysical properties of poly(N-vinylcarbazole) are interpreted, based on the photophysical properties of the diastereomers of 2,4-di(N-carbazolyl)pentane and a theoretical study of the conformational distribution in the dyads of poly(N-vinylcarbazole). From the conformational distribution in the polymer it is derived that more than 95% of the excitation will occur on a chromophore belonging to an excimer site. Since excimer formation at these excimer sites is very rapid (>10<sup>10</sup> s<sup>−1</sup>), it is concluded that, if energy migration is to be important, the rate constant of energy migration from one chromophore to another should be ⪢10<sup>10</sup> s<sup>−1</sup>.</p></div>\",\"PeriodicalId\":101036,\"journal\":{\"name\":\"Polymer Photochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1986-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0144-2880(86)90051-5\",\"citationCount\":\"13\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Photochemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0144288086900515\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Photochemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0144288086900515","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An interpretation of the photophysical properties of poly(N-vinylcarbazole) based on bichromophoric model systems and the conformational analysis of the polymer
The photophysical properties of poly(N-vinylcarbazole) are interpreted, based on the photophysical properties of the diastereomers of 2,4-di(N-carbazolyl)pentane and a theoretical study of the conformational distribution in the dyads of poly(N-vinylcarbazole). From the conformational distribution in the polymer it is derived that more than 95% of the excitation will occur on a chromophore belonging to an excimer site. Since excimer formation at these excimer sites is very rapid (>1010 s−1), it is concluded that, if energy migration is to be important, the rate constant of energy migration from one chromophore to another should be ⪢1010 s−1.
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