Better characterization of surface organometallic catalysts through resolution enhancement in proton solid state NMR spectra

Frédéric Blanc, Christophe Copéret, Jean Thivolle-Cazat, Jean Marie Basset, Anne Lesage, Lyndon Emsley*, Amritanshu Sinha, Richard R. Schrock

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Delayed-acquisition methods, namely, echo and constant-time-acquisition approaches, allow a significant improvement in resolution in the proton solid state NMR spectra of surface organometallic catalysts such as [syn-(SiO)Mo-(=NAr)(=CHtBu)(CH2 tBu)] and [(≡SiO)Re(≡CtBu)(=CHtBu)(CH2 tBu)] (syn/anti ratio = 1:1). This enables the observation of all of the proton resonances, which is not possible with the simple proton single-pulse technique under magic-angle spinning. For example, the methylene protons of the neopentyl ligands, buried in the large peak associated with all of the methyls in the 1H MAS spectrum, can easily be identified by recording a delayed-acquisition spectrum (resolution enhancement of a factor of 3 is obtained). Moreover, combining constant-time acquisition with heteronuclear carbon-proton correlation spectroscopy also improves the resolution of the 2D HETCOR spectra.

Original languageEnglish (US)
Pages (from-to)9587-9592
Number of pages6
JournalInorganic Chemistry
Volume45
Issue number23
DOIs
StatePublished - Nov 13 2006
Externally publishedYes

ASJC Scopus subject areas

  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Better characterization of surface organometallic catalysts through resolution enhancement in proton solid state NMR spectra'. Together they form a unique fingerprint.

Cite this