Pore-width-dependent ordering of C2H5OH molecules confined in graphitic slit nanospaces

Takahiro Ohkubo, T. Iiyama, K. Nishikawa, T. Suzuki, K. Kaneko

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

The X-ray diffraction (XRD) of C2H5OH molecules confined in slit-shaped graphitic micropores of activated carbon fibers having different pore widths was measured at 303 K. The effect of the pore width in the range 0.7-1.1 nm on the molecular assembly structure of C2H5OH in the micropores was examined. The XRD patterns were analyzed by use of the electron radial distribution function (ERDF) analysis. The densities of C2H5OH molecular assemblies in micropores were determined by C2H5OH adsorption at 303 K and N2 adsorption at 77 K. The density of C2H5OH molecular assemblies in the 0.9 and 1.1 nm pores was close to the solid density of C2H5OH. The ERDFs showed that the first and second nearest-neighbor peaks shift to a shorter distance with a decrease of the pore width while their peak heights increase. These changes of the ERDFs coincided very well with the adsorbed density of C2H5OH, indicating that the serious confinement by the micropores gives rise to the solidlike ordering even at 303 K.

Original languageEnglish
Pages (from-to)1859-1863
Number of pages5
JournalJournal of Physical Chemistry B
Volume103
Issue number11
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

slits
porosity
Molecules
assemblies
Adsorption
molecules
X ray diffraction
Activated carbon
Diffraction patterns
Carbon fibers
adsorption
Distribution functions
activated carbon
carbon fibers
radial distribution
x rays
diffraction patterns
Electrons
assembly
distribution functions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Ohkubo, T., Iiyama, T., Nishikawa, K., Suzuki, T., & Kaneko, K. (1999). Pore-width-dependent ordering of C2H5OH molecules confined in graphitic slit nanospaces. Journal of Physical Chemistry B, 103(11), 1859-1863.

Pore-width-dependent ordering of C2H5OH molecules confined in graphitic slit nanospaces. / Ohkubo, Takahiro; Iiyama, T.; Nishikawa, K.; Suzuki, T.; Kaneko, K.

In: Journal of Physical Chemistry B, Vol. 103, No. 11, 1999, p. 1859-1863.

Research output: Contribution to journalArticle

Ohkubo, T, Iiyama, T, Nishikawa, K, Suzuki, T & Kaneko, K 1999, 'Pore-width-dependent ordering of C2H5OH molecules confined in graphitic slit nanospaces', Journal of Physical Chemistry B, vol. 103, no. 11, pp. 1859-1863.
Ohkubo, Takahiro ; Iiyama, T. ; Nishikawa, K. ; Suzuki, T. ; Kaneko, K. / Pore-width-dependent ordering of C2H5OH molecules confined in graphitic slit nanospaces. In: Journal of Physical Chemistry B. 1999 ; Vol. 103, No. 11. pp. 1859-1863.
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