Investigation of domain size in polymer membranes using double-quantum-filtered spin diffusion magic angle spinning NMR

B. R. Cherry, C. H. Fujimoto, C. J. Cornelius, T. M. Alam

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Solid-state 1H magic angle spinning (MAS) NMR was used to investigate sulfonated Diels-Alder poly(phenlylene) polymer membranes. Under high spinning speed 1H MAS conditions, the proton environments of the sulfonic acid and phenylene polymer backbone are resolved. A double-quantum (DQ) filter using the rotor-synchronized back-to-back (BABA) NMR multiple-pulse sequence allowed the selective suppression of the sulfonic proton environment in the 1H MAS NMR spectra. This DQ filter in conjunction with a spin diffusion NMR experiment was then used to measure the domain size of the sulfonic acid component within the membrane. In addition, the temperature dependence of the sulfonic acid spin-spin relaxation time (T 2) was determined, providing an estimate of the activation energy for the proton dynamics of the dehydrated membrane.

Original languageEnglish (US)
Pages (from-to)1201-1206
Number of pages6
JournalMacromolecules
Volume38
Issue number4
DOIs
StatePublished - Feb 22 2005

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Magic angle spinning
Sulfonic Acids
Polymers
Nuclear magnetic resonance
Membranes
Protons
Acids
Relaxation time
Activation energy
Rotors
Experiments
Temperature

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Investigation of domain size in polymer membranes using double-quantum-filtered spin diffusion magic angle spinning NMR. / Cherry, B. R.; Fujimoto, C. H.; Cornelius, C. J.; Alam, T. M.

In: Macromolecules, Vol. 38, No. 4, 22.02.2005, p. 1201-1206.

Research output: Contribution to journalArticle

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