Photooxidation of Diglycine in Confined Media. Application of the Microreactor Model for Spin-Correlated Radical Pairs in Reverse Micelles and Water-in-Oil Microemulsions
Time-resolved electron paramagnetic resonance spectra (X-band) of correlated radical pairs created in AOT reverse micelles and microemulsions are presented, simulated, and discussed using the microreactor model. The radicals are formed inside the water pool using photooxidation of diglycine by the e...
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| Veröffentlicht in: | Langmuir 2005-03, Vol.21 (7), p.2721-2727 |
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| creator | White, Ryan C Tarasov, Valery F Forbes, Malcolm D. E |
| description | Time-resolved electron paramagnetic resonance spectra (X-band) of correlated radical pairs created in AOT reverse micelles and microemulsions are presented, simulated, and discussed using the microreactor model. The radicals are formed inside the water pool using photooxidation of diglycine by the excited triplet states of two different anthraquinone sulfonate salts. Water pool size and temperature effects on the spectra are reported, and the simulations allow for extraction of the diffusion coefficient in the interior, which monotonically increases with water pool size. The data directly correlate with the diffusional properties of correlated radical pairs in regular aqueous micelle solutions studied previously by similar methods. Competition between H-atom abstraction and electron transfer is observed with anthraquinone sulfonate, but electron transfer is the only reaction pathway observed when anthraquinone disulfonate triplet state is the sensitizing species. |
| doi_str_mv | 10.1021/la047382x |
| format | Article |
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The data directly correlate with the diffusional properties of correlated radical pairs in regular aqueous micelle solutions studied previously by similar methods. Competition between H-atom abstraction and electron transfer is observed with anthraquinone sulfonate, but electron transfer is the only reaction pathway observed when anthraquinone disulfonate triplet state is the sensitizing species.</description><identifier>ISSN: 0743-7463</identifier><identifier>EISSN: 1520-5827</identifier><identifier>DOI: 10.1021/la047382x</identifier><identifier>PMID: 15779940</identifier><identifier>CODEN: LANGD5</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Anthraquinones - chemistry ; Chemistry ; Colloidal state and disperse state ; Electron Spin Resonance Spectroscopy ; Emulsions - chemistry ; Emulsions. Microemulsions. Foams ; Exact sciences and technology ; Free Radicals - chemistry ; General and physical chemistry ; Glycylglycine - chemistry ; Micelles ; Micelles. 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E</creatorcontrib><title>Photooxidation of Diglycine in Confined Media. Application of the Microreactor Model for Spin-Correlated Radical Pairs in Reverse Micelles and Water-in-Oil Microemulsions</title><title>Langmuir</title><addtitle>Langmuir</addtitle><description>Time-resolved electron paramagnetic resonance spectra (X-band) of correlated radical pairs created in AOT reverse micelles and microemulsions are presented, simulated, and discussed using the microreactor model. The radicals are formed inside the water pool using photooxidation of diglycine by the excited triplet states of two different anthraquinone sulfonate salts. Water pool size and temperature effects on the spectra are reported, and the simulations allow for extraction of the diffusion coefficient in the interior, which monotonically increases with water pool size. The data directly correlate with the diffusional properties of correlated radical pairs in regular aqueous micelle solutions studied previously by similar methods. Competition between H-atom abstraction and electron transfer is observed with anthraquinone sulfonate, but electron transfer is the only reaction pathway observed when anthraquinone disulfonate triplet state is the sensitizing species.</description><subject>Anthraquinones - chemistry</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Electron Spin Resonance Spectroscopy</subject><subject>Emulsions - chemistry</subject><subject>Emulsions. Microemulsions. Foams</subject><subject>Exact sciences and technology</subject><subject>Free Radicals - chemistry</subject><subject>General and physical chemistry</subject><subject>Glycylglycine - chemistry</subject><subject>Micelles</subject><subject>Micelles. Thin films</subject><subject>Models, Chemical</subject><subject>Molecular Structure</subject><subject>Oils - chemistry</subject><subject>Oxidation-Reduction</subject><subject>Photochemistry</subject><subject>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><subject>Sulfur - chemistry</subject><subject>Temperature</subject><subject>Time Factors</subject><subject>Water - chemistry</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkcFuEzEURS0EoqGw4AeQNyCxmGKP7bFnWQUoSIkapUVdWm9mbOrijKf2DEp_ia_EIVGyYeUn-9zrq3cRekvJBSUl_eSBcMlUuX2GZlSUpBCqlM_RjEjOCskrdoZepfRACKkZr1-iMyqkrGtOZujP6j6MIWxdB6MLPQ4Wf3Y__VPreoNdj-eht3ns8NJ0Di7w5TB41x7Z8d7gpWtjiAbaMUS8DJ3x2ObpZnB9MQ8xGg9jNlhDl4Uer8DFtLNem98mpn96471JGPoO32U2Fll57fze2Wwmn_J36TV6YcEn8-ZwnqMfX7_czr8Vi-ur7_PLRQFM0bEA0VFVlzVQoKrhlrG2lJbwRjUNr6ngTSm5LBsDpqMgbb4U1ColWqo4M5ydow973yGGx8mkUW9c2kWE3oQp6UoKJkrKMvhxD-aUKUVj9RDdBuKTpkTvitHHYjL77mA6NRvTnchDExl4fwAg5TXZCH3r0omrqlrJapeu2HMujWZ7fIf4KwdjUujb1Y1eqPruSq3Wen3yhTbphzDFPu_uPwH_AjKrsx4</recordid><startdate>20050329</startdate><enddate>20050329</enddate><creator>White, Ryan C</creator><creator>Tarasov, Valery F</creator><creator>Forbes, Malcolm D. E</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20050329</creationdate><title>Photooxidation of Diglycine in Confined Media. Application of the Microreactor Model for Spin-Correlated Radical Pairs in Reverse Micelles and Water-in-Oil Microemulsions</title><author>White, Ryan C ; Tarasov, Valery F ; Forbes, Malcolm D. E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a381t-a5d18929a1a18b4f33c27f04b8bb49154b27472beaed1a7fb4951f885c1843e43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Anthraquinones - chemistry</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Electron Spin Resonance Spectroscopy</topic><topic>Emulsions - chemistry</topic><topic>Emulsions. Microemulsions. Foams</topic><topic>Exact sciences and technology</topic><topic>Free Radicals - chemistry</topic><topic>General and physical chemistry</topic><topic>Glycylglycine - chemistry</topic><topic>Micelles</topic><topic>Micelles. Thin films</topic><topic>Models, Chemical</topic><topic>Molecular Structure</topic><topic>Oils - chemistry</topic><topic>Oxidation-Reduction</topic><topic>Photochemistry</topic><topic>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</topic><topic>Sulfur - chemistry</topic><topic>Temperature</topic><topic>Time Factors</topic><topic>Water - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>White, Ryan C</creatorcontrib><creatorcontrib>Tarasov, Valery F</creatorcontrib><creatorcontrib>Forbes, Malcolm D. 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Application of the Microreactor Model for Spin-Correlated Radical Pairs in Reverse Micelles and Water-in-Oil Microemulsions</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2005-03-29</date><risdate>2005</risdate><volume>21</volume><issue>7</issue><spage>2721</spage><epage>2727</epage><pages>2721-2727</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>Time-resolved electron paramagnetic resonance spectra (X-band) of correlated radical pairs created in AOT reverse micelles and microemulsions are presented, simulated, and discussed using the microreactor model. The radicals are formed inside the water pool using photooxidation of diglycine by the excited triplet states of two different anthraquinone sulfonate salts. Water pool size and temperature effects on the spectra are reported, and the simulations allow for extraction of the diffusion coefficient in the interior, which monotonically increases with water pool size. The data directly correlate with the diffusional properties of correlated radical pairs in regular aqueous micelle solutions studied previously by similar methods. Competition between H-atom abstraction and electron transfer is observed with anthraquinone sulfonate, but electron transfer is the only reaction pathway observed when anthraquinone disulfonate triplet state is the sensitizing species.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>15779940</pmid><doi>10.1021/la047382x</doi><tpages>7</tpages></addata></record> |
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| subjects | Anthraquinones - chemistry Chemistry Colloidal state and disperse state Electron Spin Resonance Spectroscopy Emulsions - chemistry Emulsions. Microemulsions. Foams Exact sciences and technology Free Radicals - chemistry General and physical chemistry Glycylglycine - chemistry Micelles Micelles. Thin films Models, Chemical Molecular Structure Oils - chemistry Oxidation-Reduction Photochemistry Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Sulfur - chemistry Temperature Time Factors Water - chemistry |
| title | Photooxidation of Diglycine in Confined Media. Application of the Microreactor Model for Spin-Correlated Radical Pairs in Reverse Micelles and Water-in-Oil Microemulsions |
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