Substituent Effects on the Electronic Spectroscopy of Four-Carbon Criegee Intermediates
Substituent Effects on the Electronic Spectroscopy of Four-Carbon Criegee Intermediates
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DOI：
10.1021/acs.jpca.2c05502
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发表时间：
2022-09-15
影响因子：
2.9
通讯作者：
Lester, Marsha I.
中科院分区：
文献类型：
--
作者：
Liu, Tianlin;Zou, Meijun;Lester, Marsha I.
大气臭氧分解的生物和人为烯烃产生两性离子羰基氧中间体（R1 R2 C =O+O-），被称为Criegee中间体，具有不同的结构基序和构象。本研究报告了一个系统的实验室研究取代基的电子光谱的四碳Criegee中间体（CI）与甲基乙基（MECI）和异丙基（IPCI）的基团，这是在臭氧分解的不对称支链烯烃的异构体。四碳CI通过替代合成路线分别产生，并在强π * 上进行光谱表征。
Atmospheric ozonolysis of biogenic and anthropogenic alkenes generates zwitterionic carbonyl oxide intermediates (R1R2C=O+O-), known as Criegee intermediates, with different structural motifs and conformations. This study reports a systematic laboratory study of substituent effects on the electronic spectroscopy of four-carbon Criegee intermediates (CIs) with methyl-ethyl (MECI) and isopropyl (IPCI) groups, which are isomers produced in ozonolysis of asymmetric branched alkenes. The four-carbon CIs are separately generated by an alternative synthetic route, and spectroscopically characterized on the strong pi*