Ozonolysis and photolysis of alkene-terminated self-assembled monolayers on quartz nanoparticles : implications for photochemical aging of organic aerosol particles
Photolysis of alkene-terminated self assembled monolayers (SAM) deposited on Degussa SiO(2) nanoparticles is studied following oxidation of SAM with a gaseous ozone/oxygen mixture. Infrared cavity ring-down spectroscopy is used to observe gas-phase products generated during ozonolysis and subsequent...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2006-01, Vol.8 (21), p.2506-2512 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | PARK, Jiho GOMEZ, Anthony L WALSER, Maggie L AO LIN NIZKORODOV, Sergey A |
| description | Photolysis of alkene-terminated self assembled monolayers (SAM) deposited on Degussa SiO(2) nanoparticles is studied following oxidation of SAM with a gaseous ozone/oxygen mixture. Infrared cavity ring-down spectroscopy is used to observe gas-phase products generated during ozonolysis and subsequent photolysis of SAM in real time. Reactions taking place during ozonolysis transform alkene-terminated SAM into a photochemically active state capable of photolysis in the tropospheric actinic window (lambda > 295 nm). Formaldehyde and formic acid are the observed photolysis products. Photodissociation action spectra of oxidized SAM and the observed pattern of gas-phase products are consistent with the well-established Criegee mechanism of ozonolysis of terminal alkenes. There is strong evidence for the presence of secondary ozonides (1,3,4-trioxalones) and other peroxides on the oxidized SAM surface. The data imply that photolysis plays a role in atmospheric aging of primary and secondary organic aerosol particles. |
| doi_str_mv | 10.1039/b602704k |
| format | Article |
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Infrared cavity ring-down spectroscopy is used to observe gas-phase products generated during ozonolysis and subsequent photolysis of SAM in real time. Reactions taking place during ozonolysis transform alkene-terminated SAM into a photochemically active state capable of photolysis in the tropospheric actinic window (lambda > 295 nm). Formaldehyde and formic acid are the observed photolysis products. Photodissociation action spectra of oxidized SAM and the observed pattern of gas-phase products are consistent with the well-established Criegee mechanism of ozonolysis of terminal alkenes. There is strong evidence for the presence of secondary ozonides (1,3,4-trioxalones) and other peroxides on the oxidized SAM surface. The data imply that photolysis plays a role in atmospheric aging of primary and secondary organic aerosol particles.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/b602704k</identifier><identifier>PMID: 16721435</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Chemistry ; Colloidal state and disperse state ; Exact sciences and technology ; General and physical chemistry ; Photochemistry ; Physical and chemical studies. Granulometry. 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Infrared cavity ring-down spectroscopy is used to observe gas-phase products generated during ozonolysis and subsequent photolysis of SAM in real time. Reactions taking place during ozonolysis transform alkene-terminated SAM into a photochemically active state capable of photolysis in the tropospheric actinic window (lambda > 295 nm). Formaldehyde and formic acid are the observed photolysis products. Photodissociation action spectra of oxidized SAM and the observed pattern of gas-phase products are consistent with the well-established Criegee mechanism of ozonolysis of terminal alkenes. There is strong evidence for the presence of secondary ozonides (1,3,4-trioxalones) and other peroxides on the oxidized SAM surface. The data imply that photolysis plays a role in atmospheric aging of primary and secondary organic aerosol particles.</description><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Photochemistry</subject><subject>Physical and chemical studies. Granulometry. 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Granulometry. Electrokinetic phenomena</topic><topic>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>PARK, Jiho</creatorcontrib><creatorcontrib>GOMEZ, Anthony L</creatorcontrib><creatorcontrib>WALSER, Maggie L</creatorcontrib><creatorcontrib>AO LIN</creatorcontrib><creatorcontrib>NIZKORODOV, Sergey A</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>PARK, Jiho</au><au>GOMEZ, Anthony L</au><au>WALSER, Maggie L</au><au>AO LIN</au><au>NIZKORODOV, Sergey A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ozonolysis and photolysis of alkene-terminated self-assembled monolayers on quartz nanoparticles : implications for photochemical aging of organic aerosol particles</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2006-01-01</date><risdate>2006</risdate><volume>8</volume><issue>21</issue><spage>2506</spage><epage>2512</epage><pages>2506-2512</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>Photolysis of alkene-terminated self assembled monolayers (SAM) deposited on Degussa SiO(2) nanoparticles is studied following oxidation of SAM with a gaseous ozone/oxygen mixture. Infrared cavity ring-down spectroscopy is used to observe gas-phase products generated during ozonolysis and subsequent photolysis of SAM in real time. Reactions taking place during ozonolysis transform alkene-terminated SAM into a photochemically active state capable of photolysis in the tropospheric actinic window (lambda > 295 nm). Formaldehyde and formic acid are the observed photolysis products. Photodissociation action spectra of oxidized SAM and the observed pattern of gas-phase products are consistent with the well-established Criegee mechanism of ozonolysis of terminal alkenes. There is strong evidence for the presence of secondary ozonides (1,3,4-trioxalones) and other peroxides on the oxidized SAM surface. The data imply that photolysis plays a role in atmospheric aging of primary and secondary organic aerosol particles.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><pmid>16721435</pmid><doi>10.1039/b602704k</doi><tpages>7</tpages></addata></record> |
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| source | Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals; Alma/SFX Local Collection |
| subjects | Chemistry Colloidal state and disperse state Exact sciences and technology General and physical chemistry Photochemistry Physical and chemical studies. Granulometry. Electrokinetic phenomena Physical chemistry of induced reactions (with radiations, particles and ultrasonics) |
| title | Ozonolysis and photolysis of alkene-terminated self-assembled monolayers on quartz nanoparticles : implications for photochemical aging of organic aerosol particles |
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