Unknown

Dataset Information

0

Structures and reactivity of peroxy radicals and dimeric products revealed by online tandem mass spectrometry.


ABSTRACT: Organic peroxy radicals (RO2) play a pivotal role in the degradation of hydrocarbons. The autoxidation of atmospheric RO2 radicals produces highly oxygenated organic molecules (HOMs), including low-volatility ROOR dimers formed by bimolecular RO2?+?RO2 reactions. HOMs can initiate and greatly contribute to the formation and growth of atmospheric particles. As a result, HOMs have far-reaching health and climate implications. Nevertheless, the structures and formation mechanism of RO2 radicals and HOMs remain elusive. Here, we present the in-situ characterization of RO2 and dimer structure in the gas-phase, using online tandem mass spectrometry analyses. In this study, we constrain the structures and formation pathway of several HOM-RO2 radicals and dimers produced from monoterpene ozonolysis, a prominent atmospheric oxidation process. In addition to providing insights into atmospheric HOM chemistry, this study debuts online tandem MS analyses as a unique approach for the chemical characterization of reactive compounds, e.g., organic radicals.

SUBMITTER: Tomaz S 

PROVIDER: S-EPMC7804243 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

altmetric image

Publications


Organic peroxy radicals (RO<sub>2</sub>) play a pivotal role in the degradation of hydrocarbons. The autoxidation of atmospheric RO<sub>2</sub> radicals produces highly oxygenated organic molecules (HOMs), including low-volatility ROOR dimers formed by bimolecular RO<sub>2</sub> + RO<sub>2</sub> reactions. HOMs can initiate and greatly contribute to the formation and growth of atmospheric particles. As a result, HOMs have far-reaching health and climate implications. Nevertheless, the structures  ...[more]

Similar Datasets

| S-EPMC6727596 | biostudies-literature
| S-EPMC10435581 | biostudies-literature
| S-EPMC5435387 | biostudies-literature
| S-EPMC5071643 | biostudies-literature
| S-EPMC10599409 | biostudies-literature
| S-EPMC6713497 | biostudies-literature
| S-EPMC7391080 | biostudies-literature
| S-EPMC7343235 | biostudies-literature
| S-EPMC5613954 | biostudies-literature
| S-EPMC5729027 | biostudies-literature