{"title":"胸腺嘧啶的光二聚机理","authors":"Marie-José Mantione, Bernard Pullman","doi":"10.1016/0926-6550(64)90068-4","DOIUrl":null,"url":null,"abstract":"<div><p>The study by the molecular orbital method of the electronic structure of the biological pyrimidine bases undergoing photodimerization leads to the conclusion that this reaction involves the triplet state of these molecules. It is shown that in this state the greatest concentration of the lone electrons is generally at C-5 on one of the half-filled orbitals and on C-6 on the other such orbital. When this is the situation, the rate of photodimerization parallels the total concentration of the uncoupled electrons on the C-5–C-6 bond.</p></div>","PeriodicalId":100173,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects","volume":"91 3","pages":"Pages 387-398"},"PeriodicalIF":0.0000,"publicationDate":"1964-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6550(64)90068-4","citationCount":"27","resultStr":"{\"title\":\"Sur le mécanisme de la photodimérisation de la thymine\",\"authors\":\"Marie-José Mantione, Bernard Pullman\",\"doi\":\"10.1016/0926-6550(64)90068-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The study by the molecular orbital method of the electronic structure of the biological pyrimidine bases undergoing photodimerization leads to the conclusion that this reaction involves the triplet state of these molecules. It is shown that in this state the greatest concentration of the lone electrons is generally at C-5 on one of the half-filled orbitals and on C-6 on the other such orbital. When this is the situation, the rate of photodimerization parallels the total concentration of the uncoupled electrons on the C-5–C-6 bond.</p></div>\",\"PeriodicalId\":100173,\"journal\":{\"name\":\"Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects\",\"volume\":\"91 3\",\"pages\":\"Pages 387-398\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1964-11-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0926-6550(64)90068-4\",\"citationCount\":\"27\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0926655064900684\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0926655064900684","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Sur le mécanisme de la photodimérisation de la thymine
The study by the molecular orbital method of the electronic structure of the biological pyrimidine bases undergoing photodimerization leads to the conclusion that this reaction involves the triplet state of these molecules. It is shown that in this state the greatest concentration of the lone electrons is generally at C-5 on one of the half-filled orbitals and on C-6 on the other such orbital. When this is the situation, the rate of photodimerization parallels the total concentration of the uncoupled electrons on the C-5–C-6 bond.
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