Barbara B. Bunn, Tamas Bartik , Berit Bartik , William R. Bebout, Thomas E. Glass, Brian E. Hanson
{"title":"Phosphorus-31 NMR spin lattice relaxation times as an indirect probe of adsorbed water in supported aqueous phase catalysts","authors":"Barbara B. Bunn, Tamas Bartik , Berit Bartik , William R. Bebout, Thomas E. Glass, Brian E. Hanson","doi":"10.1016/S0304-5102(94)87037-3","DOIUrl":null,"url":null,"abstract":"<div><p>Phosphorus-31 spin lattice relaxation times, <em>T</em><sub>1</sub>'s, for SAP hydroformylation catalysts derived from HRh (CO) (TPPTS)<sub>3</sub> and TPPTS (TPPTS = trisulfonated triphenyl phosphine trisodium salt) are consistent with a liquid-like character for the supported aqueous phase. Ale <em>T</em><sub>1</sub> for solid TPPTS is 1150 s while for TPPTS in a supported aqueous phase <em>T</em><sub>1</sub> varies from 220 to 4.9 s. A <em>T</em><sub>1</sub> of 4.9 s is close to the value obtained for TPPTS in solution and is observed at a H<sub>2</sub>O/P ratio of 24.9. At this level of water content previously reported SAP catalysts have shown maximum catalytic activity for the hydroformylation of olefins.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"94 2","pages":"Pages 157-161"},"PeriodicalIF":0.0000,"publicationDate":"1994-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0304-5102(94)87037-3","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304510294870373","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 11
Abstract
Phosphorus-31 spin lattice relaxation times, T1's, for SAP hydroformylation catalysts derived from HRh (CO) (TPPTS)3 and TPPTS (TPPTS = trisulfonated triphenyl phosphine trisodium salt) are consistent with a liquid-like character for the supported aqueous phase. Ale T1 for solid TPPTS is 1150 s while for TPPTS in a supported aqueous phase T1 varies from 220 to 4.9 s. A T1 of 4.9 s is close to the value obtained for TPPTS in solution and is observed at a H2O/P ratio of 24.9. At this level of water content previously reported SAP catalysts have shown maximum catalytic activity for the hydroformylation of olefins.
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