[(CH3)5C5]2Th(CH3)2/Silica Surface Chemistry. High-Resolution 13C CPMAS NMR Evidence for Alkylation of Surface Silicon Sites

Paul J. Toscano, Tobin J. Marks*

*Corresponding author for this work

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

The reaction of Cp’2Th(13CH3)2 (Cp’ = η5-Me5C5) with dehydroxylated silica (ca. 0.4 surface OH/nm2) has been studied by high-resolution 13C CPMAS NMR spectroscopy. On the basis of 13C chemical shifts, relative signal intensities, and NMR data from model compounds and model reactions, it is proposed that the predominant adsorption pathway involves methyl transfer from thorium to surface silicon sites. The products of this Si-O cleavage process are surface Si-CH3 and Cp’2Th(CH3)-siloxide functionalities. The resulting thorium environment appears to be somewhat more electron rich than in the analogous surface complex on dehydroxylated γ-alumina.

Original languageEnglish (US)
Pages (from-to)820-823
Number of pages4
JournalLangmuir
Volume2
Issue number6
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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