{"title":"pH of Water Intercalated into Graphite Oxide as Determined by EPR Spectroscopy","authors":"Tatiana S. Yankova, Natalia A. Chumakova","doi":"10.1007/s00723-022-01509-4","DOIUrl":null,"url":null,"abstract":"<div><p>Two pH-sensitive spin probes 4-(methylamino)-2-ethyl-5,5-dimethyl-4-pyridine-2-yl-2,5-dihydro-1<i>H</i>-imidazol-1-oxyl (DPI, also known as MEP) and 2,2,3,5,5-pentamethyl-2,5-dihydro-1<i>H</i>-imidazol-1-oxyl (MTI) were used to measure pH of water intercalated in Brodie graphite oxide. The pH value was found to be 2.25 ± 0.05 immediately after adding water to graphite oxide and decreased to 1.75 ± 0.05 during ca<i>.</i> 30 h.</p></div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"54 2","pages":"311 - 320"},"PeriodicalIF":1.1000,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Magnetic Resonance","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s00723-022-01509-4","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
引用次数: 1
Abstract
Two pH-sensitive spin probes 4-(methylamino)-2-ethyl-5,5-dimethyl-4-pyridine-2-yl-2,5-dihydro-1H-imidazol-1-oxyl (DPI, also known as MEP) and 2,2,3,5,5-pentamethyl-2,5-dihydro-1H-imidazol-1-oxyl (MTI) were used to measure pH of water intercalated in Brodie graphite oxide. The pH value was found to be 2.25 ± 0.05 immediately after adding water to graphite oxide and decreased to 1.75 ± 0.05 during ca. 30 h.
期刊介绍：
Applied Magnetic Resonance provides an international forum for the application of magnetic resonance in physics, chemistry, biology, medicine, geochemistry, ecology, engineering, and related fields.
The contents include articles with a strong emphasis on new applications, and on new experimental methods. Additional features include book reviews and Letters to the Editor.
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