31P MAS NMR study of the hydrolysis of O,S-diethyl phenylphosphonothioate on reactive sorbents

✍ Scribed by George W. Wagner; Philip W. Bartram

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 613 KB
• Volume: 99
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(95)00054-2

✦ Synopsis

3'P MAS NMR was used to monitor the hydrolysis of O,S-diethyl phenylphosphonothioate (DEPPT) sorbed on gammaalumina, XE-555 (a mixture of strong-acid/strong-base ion exchange resins and a carbonaceous adsorbent), and a polydivinylbenzene sorbent impregnated with NaOH. The products were identified to determine the amount of P-O/P-S bond hydrolysis occurring on the sorbents. The relative order of reactivity observed for the sorbents is: polydivinylbenzene/NaOH> gamma-alumina> XE-555. Distinct 31P MAS NMR peaks were observed for DEPPT sorbed on the individual components of XE-555. "P MAS NMR also suggested the presence of mobile and translationally-restricted phases for DEPPT sorbed on gamma-alumina. These aspects of DEPPT sorption provided by 3'P MAS NMR enabled a better understanding of the DEPPT reactivity observed on XE-555 and gamma-alumina.