Sara A. Maute, Alexander A. Marchione, Elizabeth L. Diaz
{"title":"Multiplicity-edited heteronuclear single quantum coherence experiment modified for 19F-13C","authors":"Sara A. Maute, Alexander A. Marchione, Elizabeth L. Diaz","doi":"10.1016/j.jfluchem.2023.110204","DOIUrl":null,"url":null,"abstract":"<div><p>The popular multiplicity-edited heteronuclear single quantum coherence experiment has been modified for <sup>19</sup>F-<sup>13</sup>C experiments by insertion of broadband inversion and refocusing pulses in <sup>19</sup>F. This experiment has particular utility in distinguishing CF<sub>3</sub> from CF<sub>2</sub>X, and CF<sub>2</sub> from CFX (X = O or halide). Examples are shown of 1,1,2-trichloro-1,2,2-trifluoroethane, a mixture of 1,1,2-trichloro-1,2,2-trifluoroethane and two perfluoroolefins, and a mixture of poly(hexafluoropropylene oxide) and perfluorohexyl iodide. Phase distortions are minimized by careful selection of the value of J<sub>CF</sub> for which delays are optimized; a slight overstatement of J<sub>CF</sub> yielded no distortions, while an understatement did. Large <sup>19</sup>F homonuclear couplings do not report cleanly in-phase. A one-dimensional version of the experiment yielded analogous editing by phase.</p></div>","PeriodicalId":357,"journal":{"name":"Journal of Fluorine Chemistry","volume":"272 ","pages":"Article 110204"},"PeriodicalIF":1.7000,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fluorine Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022113923001197","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The popular multiplicity-edited heteronuclear single quantum coherence experiment has been modified for 19F-13C experiments by insertion of broadband inversion and refocusing pulses in 19F. This experiment has particular utility in distinguishing CF3 from CF2X, and CF2 from CFX (X = O or halide). Examples are shown of 1,1,2-trichloro-1,2,2-trifluoroethane, a mixture of 1,1,2-trichloro-1,2,2-trifluoroethane and two perfluoroolefins, and a mixture of poly(hexafluoropropylene oxide) and perfluorohexyl iodide. Phase distortions are minimized by careful selection of the value of JCF for which delays are optimized; a slight overstatement of JCF yielded no distortions, while an understatement did. Large 19F homonuclear couplings do not report cleanly in-phase. A one-dimensional version of the experiment yielded analogous editing by phase.
期刊介绍：
The Journal of Fluorine Chemistry contains reviews, original papers and short communications. The journal covers all aspects of pure and applied research on the chemistry as well as on the applications of fluorine, and of compounds or materials where fluorine exercises significant effects. This can include all chemistry research areas (inorganic, organic, organometallic, macromolecular and physical chemistry) but also includes papers on biological/biochemical related aspects of Fluorine chemistry as well as medicinal, agrochemical and pharmacological research. The Journal of Fluorine Chemistry also publishes environmental and industrial papers dealing with aspects of Fluorine chemistry on energy and material sciences. Preparative and physico-chemical investigations as well as theoretical, structural and mechanistic aspects are covered. The Journal, however, does not accept work of purely routine nature.
For reviews and special issues on particular topics of fluorine chemistry or from selected symposia, please contact the Regional Editors for further details.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
