Investigation of the dynamic behavior of propanol macroclusters on the silica surface in cyclohexane by1H NMR

Takato Hosoura, Satoshi Endo, Kazue Kurihara

Research output: Contribution to conferencePaperpeer-review

Abstract

We have found that alcohol (methanol, ethanol and propanol) molecules form a hydrogen-bonded organized structure when they are adsorbed on the silica surface in cyclohexane. In this study, we investigated this phenomenon using 1H NMR spectroscopy for 1- and 2-propanol. We measured 1H NMR spectrum of propanol using deuterated cyclohexane as solvent in the presence and absence of silica spheres. In the absence of silica spheres, the OH line shapes for both propanols were independent of the propanol concentration below at least 4.0 mol%. However, in the presence of silica spheres, these line shapes changed with the increasing propanol concentration. For OH group of both 1- and 2-propanol, we observed the line broadening. The line shape was changed into triplet and doublet for 1- and 2-propanol, respectively. Thin adsorption layers on the interface exhibited an intensive effect on the NMR signals of bulk propanol molecules. We discuss these changes in terms of the molecular dynamics between the adsorption layer and the bulk phase.

Original languageEnglish
Pages3820-3821
Number of pages2
Publication statusPublished - 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sep 202005 Sep 22

Other

Other54th SPSJ Symposium on Macromolecules
Country/TerritoryJapan
CityYamagata
Period05/9/2005/9/22

Keywords

  • 1-propanol
  • 2-propanol
  • H NMR
  • Macrocluster
  • Molecular dynamics

ASJC Scopus subject areas

  • Engineering(all)

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