Structural and spectroscopic studies of alkali-metal exchanged stilbites

Yanmei Ma, Zhenxian Liu, Aihui Geng, Thomas Vogt, Yongjae Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The structural, infrared (IR) and Raman spectroscopic properties of alkali-metal exchanged (Na+, K+, Rb+, Cs+) zeolites with the stilbite (STI) framework have been studied by Rietveld analysis of high-resolution synchrotron X-ray powder diffraction data, micro-Raman and synchrotron IR spectroscopy at ambient conditions. Ordered arrangements of the extra-framework cations (EFCs) and H2O molecules were found at the intersection of the 10- and 8-ring channels as well as framework distortions and deformations of the channel system caused by the EFCs distributions. The T(5)-T(5) distances along the chains of the structural building units range from 8.921(1) to 8.979(5) Å and scale with the size of EFCs in Na-, K-, Rb-, Cs-STI. Furthermore, our spectroscopic studies show a systematic increase of characteristic band frequencies for the 4- and 5-ring breathing vibration modes in the far-IR spectral region with the size of the EFCs. The frequencies of the ring vibrational bands in the IR and Raman spectra are very sensitive to the presence of specific EFCS, and framework distortion.

Original languageEnglish
Pages (from-to)339-348
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume224
DOIs
Publication statusPublished - 2016 Apr 1

Fingerprint

Alkali Metals
Alkali metals
alkali metals
Cations
Positive ions
cations
Infrared radiation
Synchrotrons
rings
synchrotrons
breathing vibration
Rietveld analysis
Zeolites
zeolites
X ray powder diffraction
intersections
Frequency bands
Raman scattering
Infrared spectroscopy
vibration mode

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

Ma, Yanmei ; Liu, Zhenxian ; Geng, Aihui ; Vogt, Thomas ; Lee, Yongjae. / Structural and spectroscopic studies of alkali-metal exchanged stilbites. In: Microporous and Mesoporous Materials. 2016 ; Vol. 224. pp. 339-348.
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Structural and spectroscopic studies of alkali-metal exchanged stilbites. / Ma, Yanmei; Liu, Zhenxian; Geng, Aihui; Vogt, Thomas; Lee, Yongjae.

In: Microporous and Mesoporous Materials, Vol. 224, 01.04.2016, p. 339-348.

Research output: Contribution to journalArticle

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