{"title":"丙酮在里德伯激发下的光异构化","authors":"Monoj Samanta, Indrani Bhattacharya, Piyali Chatterjee, Koushik Mondal, Tapas Chakraborty","doi":"10.1007/s12039-023-02155-4","DOIUrl":null,"url":null,"abstract":"<div><p>Acetone photochemistry upon excitation by vacuum ultraviolet (VUV) radiation of photon energy 7.75 eV has been investigated under a cryogenic condition of an argon matrix (8 K) and also by shining the molecule seeded in an effusive beam of argon prior to matrix deposition on a pre-cooled KBr window, where the photo-products get trapped in the argon matrix. Product analysis by infrared spectroscopy reveals appearance of the characteristic enolic O-H stretching fundamental at 3622 cm<sup>-1</sup> and other bands in the infrared fingerprint region, including C=C stretching only in the gas phase. The findings reveal the opening of a new isomerization reaction channel of acetone over the popular Norrish type-I α-CC bond cleavage upon VUV excitation to high-lying Rydberg states.</p><h3>Graphical abstract:</h3><p>SYNOPSIS Photochemical transformation of acetone upon excitation by vacuum ultraviolet radiation of photon energy 7.75 eV is reported under a cryogenic condition of an argon matrix (8 K). Infrared spectroscopic analysis of the products reveals that acetone isomerizes to the enolic form, 1-propene-2-ol, upon excitation to the high-lying Rydberg states.\n</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":50242,"journal":{"name":"Journal of Chemical Sciences","volume":"135 2","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2023-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photoisomerization of acetone via Rydberg excitation\",\"authors\":\"Monoj Samanta, Indrani Bhattacharya, Piyali Chatterjee, Koushik Mondal, Tapas Chakraborty\",\"doi\":\"10.1007/s12039-023-02155-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Acetone photochemistry upon excitation by vacuum ultraviolet (VUV) radiation of photon energy 7.75 eV has been investigated under a cryogenic condition of an argon matrix (8 K) and also by shining the molecule seeded in an effusive beam of argon prior to matrix deposition on a pre-cooled KBr window, where the photo-products get trapped in the argon matrix. Product analysis by infrared spectroscopy reveals appearance of the characteristic enolic O-H stretching fundamental at 3622 cm<sup>-1</sup> and other bands in the infrared fingerprint region, including C=C stretching only in the gas phase. The findings reveal the opening of a new isomerization reaction channel of acetone over the popular Norrish type-I α-CC bond cleavage upon VUV excitation to high-lying Rydberg states.</p><h3>Graphical abstract:</h3><p>SYNOPSIS Photochemical transformation of acetone upon excitation by vacuum ultraviolet radiation of photon energy 7.75 eV is reported under a cryogenic condition of an argon matrix (8 K). Infrared spectroscopic analysis of the products reveals that acetone isomerizes to the enolic form, 1-propene-2-ol, upon excitation to the high-lying Rydberg states.\\n</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>\",\"PeriodicalId\":50242,\"journal\":{\"name\":\"Journal of Chemical Sciences\",\"volume\":\"135 2\",\"pages\":\"\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2023-05-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Chemical Sciences\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12039-023-02155-4\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Chemistry\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Sciences","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12039-023-02155-4","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Chemistry","Score":null,"Total":0}
Photoisomerization of acetone via Rydberg excitation
Acetone photochemistry upon excitation by vacuum ultraviolet (VUV) radiation of photon energy 7.75 eV has been investigated under a cryogenic condition of an argon matrix (8 K) and also by shining the molecule seeded in an effusive beam of argon prior to matrix deposition on a pre-cooled KBr window, where the photo-products get trapped in the argon matrix. Product analysis by infrared spectroscopy reveals appearance of the characteristic enolic O-H stretching fundamental at 3622 cm-1 and other bands in the infrared fingerprint region, including C=C stretching only in the gas phase. The findings reveal the opening of a new isomerization reaction channel of acetone over the popular Norrish type-I α-CC bond cleavage upon VUV excitation to high-lying Rydberg states.
Graphical abstract:
SYNOPSIS Photochemical transformation of acetone upon excitation by vacuum ultraviolet radiation of photon energy 7.75 eV is reported under a cryogenic condition of an argon matrix (8 K). Infrared spectroscopic analysis of the products reveals that acetone isomerizes to the enolic form, 1-propene-2-ol, upon excitation to the high-lying Rydberg states.
期刊介绍：
Journal of Chemical Sciences is a monthly journal published by the Indian Academy of Sciences. It formed part of the original Proceedings of the Indian Academy of Sciences – Part A, started by the Nobel Laureate Prof C V Raman in 1934, that was split in 1978 into three separate journals. It was renamed as Journal of Chemical Sciences in 2004. The journal publishes original research articles and rapid communications, covering all areas of chemical sciences. A significant feature of the journal is its special issues, brought out from time to time, devoted to conference symposia/proceedings in frontier areas of the subject, held not only in India but also in other countries.
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