Electron spin resonance studies of superoxide ions produced by radiolysis in alcoholic media
Air or oxygen saturated alcohols or aqueous alcohols gave O/sub 2//sup -/ on exposure to /sup 60/Co ..gamma.. rays at 77/sup 0/K. These radicals were characterized by low-field parallel ESR features whose g values were solvent dependent. The shift of g/sub parallel/ from 2.0023 was least for aqueous...
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| Veröffentlicht in: | J. Phys. Chem.; (United States) 1977-07, Vol.81 (15), p.1502-1504 |
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| creator | Eastland, George W Symons, Martyn C. R |
| description | Air or oxygen saturated alcohols or aqueous alcohols gave O/sub 2//sup -/ on exposure to /sup 60/Co ..gamma.. rays at 77/sup 0/K. These radicals were characterized by low-field parallel ESR features whose g values were solvent dependent. The shift of g/sub parallel/ from 2.0023 was least for aqueous methanol and greatest for cyclohexanol. In some cases slight annealing above 77/sup 0/K gave an increase in yield and a small shift in g/sub parallel/ toward 2.0023. Dissolution of NaO/sub 2/ in these solvents gave well-defined spectra of O/sub 2//sup -/ with g/sub parallel/ values identical with the limiting values obtained by radiolysis. On annealing the irradiated glasses the g/sub parallel/ features for O/sub 2//sup -/ decayed simultaneously with the growth of features assigned to HO/sub 2/ (or DO/sub 2/). In some cases RO/sub 2/ radicals were also detected. Since the magnitude of g/sub parallel/ is controlled by the strength and direction of the hydrogen bonds, and since the parent dioxygen molecules are not hydrogen bonded, we conclude that solvation is almost completely developed at 77/sup 0/K in these media within |
| doi_str_mv | 10.1021/j100530a017 |
| format | Article |
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R</creator><creatorcontrib>Eastland, George W ; Symons, Martyn C. R ; Univ. of Leicester, Eng</creatorcontrib><description>Air or oxygen saturated alcohols or aqueous alcohols gave O/sub 2//sup -/ on exposure to /sup 60/Co ..gamma.. rays at 77/sup 0/K. These radicals were characterized by low-field parallel ESR features whose g values were solvent dependent. The shift of g/sub parallel/ from 2.0023 was least for aqueous methanol and greatest for cyclohexanol. In some cases slight annealing above 77/sup 0/K gave an increase in yield and a small shift in g/sub parallel/ toward 2.0023. Dissolution of NaO/sub 2/ in these solvents gave well-defined spectra of O/sub 2//sup -/ with g/sub parallel/ values identical with the limiting values obtained by radiolysis. On annealing the irradiated glasses the g/sub parallel/ features for O/sub 2//sup -/ decayed simultaneously with the growth of features assigned to HO/sub 2/ (or DO/sub 2/). In some cases RO/sub 2/ radicals were also detected. Since the magnitude of g/sub parallel/ is controlled by the strength and direction of the hydrogen bonds, and since the parent dioxygen molecules are not hydrogen bonded, we conclude that solvation is almost completely developed at 77/sup 0/K in these media within <60 s.</description><identifier>ISSN: 0022-3654</identifier><identifier>EISSN: 1541-5740</identifier><identifier>DOI: 10.1021/j100530a017</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>400600 - Radiation Chemistry ; ALCOHOLS ; ALKALI METAL COMPOUNDS ; CHEMICAL RADIATION EFFECTS ; CHEMICAL REACTIONS ; CHEMISTRY ; DECOMPOSITION ; ELECTRON SPIN RESONANCE ; G VALUE ; GLYCOLS ; HYDROPEROXY RADICALS ; HYDROXY COMPOUNDS ; LOW TEMPERATURE ; MAGNETIC RESONANCE ; ORGANIC COMPOUNDS ; OXYGEN COMPOUNDS ; PEROXIDES ; RADIATION CHEMISTRY ; RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY ; RADIATION EFFECTS ; RADICALS ; RADIOLYSIS ; RESONANCE ; SODIUM COMPOUNDS</subject><ispartof>J. 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R</creatorcontrib><creatorcontrib>Univ. of Leicester, Eng</creatorcontrib><title>Electron spin resonance studies of superoxide ions produced by radiolysis in alcoholic media</title><title>J. Phys. Chem.; (United States)</title><addtitle>J. Phys. Chem</addtitle><description>Air or oxygen saturated alcohols or aqueous alcohols gave O/sub 2//sup -/ on exposure to /sup 60/Co ..gamma.. rays at 77/sup 0/K. These radicals were characterized by low-field parallel ESR features whose g values were solvent dependent. The shift of g/sub parallel/ from 2.0023 was least for aqueous methanol and greatest for cyclohexanol. In some cases slight annealing above 77/sup 0/K gave an increase in yield and a small shift in g/sub parallel/ toward 2.0023. Dissolution of NaO/sub 2/ in these solvents gave well-defined spectra of O/sub 2//sup -/ with g/sub parallel/ values identical with the limiting values obtained by radiolysis. On annealing the irradiated glasses the g/sub parallel/ features for O/sub 2//sup -/ decayed simultaneously with the growth of features assigned to HO/sub 2/ (or DO/sub 2/). In some cases RO/sub 2/ radicals were also detected. Since the magnitude of g/sub parallel/ is controlled by the strength and direction of the hydrogen bonds, and since the parent dioxygen molecules are not hydrogen bonded, we conclude that solvation is almost completely developed at 77/sup 0/K in these media within <60 s.</description><subject>400600 - Radiation Chemistry</subject><subject>ALCOHOLS</subject><subject>ALKALI METAL COMPOUNDS</subject><subject>CHEMICAL RADIATION EFFECTS</subject><subject>CHEMICAL REACTIONS</subject><subject>CHEMISTRY</subject><subject>DECOMPOSITION</subject><subject>ELECTRON SPIN RESONANCE</subject><subject>G VALUE</subject><subject>GLYCOLS</subject><subject>HYDROPEROXY RADICALS</subject><subject>HYDROXY COMPOUNDS</subject><subject>LOW TEMPERATURE</subject><subject>MAGNETIC RESONANCE</subject><subject>ORGANIC COMPOUNDS</subject><subject>OXYGEN COMPOUNDS</subject><subject>PEROXIDES</subject><subject>RADIATION CHEMISTRY</subject><subject>RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY</subject><subject>RADIATION EFFECTS</subject><subject>RADICALS</subject><subject>RADIOLYSIS</subject><subject>RESONANCE</subject><subject>SODIUM COMPOUNDS</subject><issn>0022-3654</issn><issn>1541-5740</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1977</creationdate><recordtype>article</recordtype><recordid>eNptkE1LAzEURYMoWKsr_0Bw40JGk8lkPpZSWhULipauhJBJ3tDU6WTIm0L7741UxIWrtznvcu8h5JKzW85SfrfmjEnBNOPFERlxmfFEFhk7JiPG0jQRucxOyRnimjHGheAj8jFtwQzBdxR719EA6DvdGaA4bK0DpL6huO0h-J2zQJ3vkPbB260BS-s9Ddo63-7RIY3vujV-5Vtn6Aas0-fkpNEtwsXPHZPFbLqYPCbzl4enyf080SIth6SsbMWkNFWuOdQ2S8vY31Sxci6yAipIGymbFJrSytRURQWa27rKczBG1LUYk6tDrMfBKTRuALMyvuviMlWIqCTLInRzgEzwiAEa1Qe30WGvOFPf8tQfeZFODrTDAXa_qA6fKi9EIdXi9V0tRTFbvj0zJSJ_feC1QbX229DFvf8mfwEwxH2T</recordid><startdate>19770701</startdate><enddate>19770701</enddate><creator>Eastland, George W</creator><creator>Symons, Martyn C. 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R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a328t-89d9055c96a1ebd428017c90026347e9e2f55f2ef8d52c979ea1db966ecc3bb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1977</creationdate><topic>400600 - Radiation Chemistry</topic><topic>ALCOHOLS</topic><topic>ALKALI METAL COMPOUNDS</topic><topic>CHEMICAL RADIATION EFFECTS</topic><topic>CHEMICAL REACTIONS</topic><topic>CHEMISTRY</topic><topic>DECOMPOSITION</topic><topic>ELECTRON SPIN RESONANCE</topic><topic>G VALUE</topic><topic>GLYCOLS</topic><topic>HYDROPEROXY RADICALS</topic><topic>HYDROXY COMPOUNDS</topic><topic>LOW TEMPERATURE</topic><topic>MAGNETIC RESONANCE</topic><topic>ORGANIC COMPOUNDS</topic><topic>OXYGEN COMPOUNDS</topic><topic>PEROXIDES</topic><topic>RADIATION CHEMISTRY</topic><topic>RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY</topic><topic>RADIATION EFFECTS</topic><topic>RADICALS</topic><topic>RADIOLYSIS</topic><topic>RESONANCE</topic><topic>SODIUM COMPOUNDS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Eastland, George W</creatorcontrib><creatorcontrib>Symons, Martyn C. R</creatorcontrib><creatorcontrib>Univ. of Leicester, Eng</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>J. Phys. Chem.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Eastland, George W</au><au>Symons, Martyn C. R</au><aucorp>Univ. of Leicester, Eng</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electron spin resonance studies of superoxide ions produced by radiolysis in alcoholic media</atitle><jtitle>J. Phys. Chem.; (United States)</jtitle><addtitle>J. Phys. Chem</addtitle><date>1977-07-01</date><risdate>1977</risdate><volume>81</volume><issue>15</issue><spage>1502</spage><epage>1504</epage><pages>1502-1504</pages><issn>0022-3654</issn><eissn>1541-5740</eissn><abstract>Air or oxygen saturated alcohols or aqueous alcohols gave O/sub 2//sup -/ on exposure to /sup 60/Co ..gamma.. rays at 77/sup 0/K. These radicals were characterized by low-field parallel ESR features whose g values were solvent dependent. The shift of g/sub parallel/ from 2.0023 was least for aqueous methanol and greatest for cyclohexanol. In some cases slight annealing above 77/sup 0/K gave an increase in yield and a small shift in g/sub parallel/ toward 2.0023. Dissolution of NaO/sub 2/ in these solvents gave well-defined spectra of O/sub 2//sup -/ with g/sub parallel/ values identical with the limiting values obtained by radiolysis. On annealing the irradiated glasses the g/sub parallel/ features for O/sub 2//sup -/ decayed simultaneously with the growth of features assigned to HO/sub 2/ (or DO/sub 2/). In some cases RO/sub 2/ radicals were also detected. Since the magnitude of g/sub parallel/ is controlled by the strength and direction of the hydrogen bonds, and since the parent dioxygen molecules are not hydrogen bonded, we conclude that solvation is almost completely developed at 77/sup 0/K in these media within <60 s.</abstract><cop>United States</cop><pub>American Chemical Society</pub><doi>10.1021/j100530a017</doi><tpages>3</tpages></addata></record> |
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| ispartof | J. Phys. Chem.; (United States), 1977-07, Vol.81 (15), p.1502-1504 |
| issn | 0022-3654 1541-5740 |
| language | eng |
| recordid | cdi_crossref_primary_10_1021_j100530a017 |
| source | American Chemical Society (ACS) Journals |
| subjects | 400600 - Radiation Chemistry ALCOHOLS ALKALI METAL COMPOUNDS CHEMICAL RADIATION EFFECTS CHEMICAL REACTIONS CHEMISTRY DECOMPOSITION ELECTRON SPIN RESONANCE G VALUE GLYCOLS HYDROPEROXY RADICALS HYDROXY COMPOUNDS LOW TEMPERATURE MAGNETIC RESONANCE ORGANIC COMPOUNDS OXYGEN COMPOUNDS PEROXIDES RADIATION CHEMISTRY RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY RADIATION EFFECTS RADICALS RADIOLYSIS RESONANCE SODIUM COMPOUNDS |
| title | Electron spin resonance studies of superoxide ions produced by radiolysis in alcoholic media |
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