{"title":"Recent Advances in Ozone Photochemistry: A Lambda Doublet Propensity and Spin-Forbidden Channels.","authors":"Megan N Aardema, Simon W North","doi":"10.1146/annurev-physchem-082423-124349","DOIUrl":null,"url":null,"abstract":"<p><p>Recent studies on ozone photodissociation in the Hartley and Huggins bands have provided new insights into the dissociation dynamics and product state distributions. A Λ-doublet propensity in the photodissociation has been identified through experiment and theory as the origin of the oscillatory O<sub>2</sub>(a1Δ<sub>g</sub>) rotational distributions and provides a promising diagnostic for determining the relative contributions of 3<i>A</i>' and 3<i>A</i>″ states in Huggins band spin-forbidden processes. Recent experiments on spin-forbidden dissociation have provided detailed information about the vibrational and rotational distributions of the O<sub>2</sub> products and the branching ratios between the O<sub>2</sub> electronic states, serving as a motivation for high-level theory.</p>","PeriodicalId":7967,"journal":{"name":"Annual review of physical chemistry","volume":" ","pages":""},"PeriodicalIF":11.7000,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annual review of physical chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1146/annurev-physchem-082423-124349","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
Recent studies on ozone photodissociation in the Hartley and Huggins bands have provided new insights into the dissociation dynamics and product state distributions. A Λ-doublet propensity in the photodissociation has been identified through experiment and theory as the origin of the oscillatory O2(a1Δg) rotational distributions and provides a promising diagnostic for determining the relative contributions of 3A' and 3A″ states in Huggins band spin-forbidden processes. Recent experiments on spin-forbidden dissociation have provided detailed information about the vibrational and rotational distributions of the O2 products and the branching ratios between the O2 electronic states, serving as a motivation for high-level theory.
期刊介绍：
The Annual Review of Physical Chemistry has been published since 1950 and is a comprehensive resource for significant advancements in the field. It encompasses various sub-disciplines such as biophysical chemistry, chemical kinetics, colloids, electrochemistry, geochemistry and cosmochemistry, chemistry of the atmosphere and climate, laser chemistry and ultrafast processes, the liquid state, magnetic resonance, physical organic chemistry, polymers and macromolecules, and others.
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