Structural and spectroscopic studies of alkali-metal exchanged stilbites

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

doi:10.1016/j.micromeso.2016.01.005

Structural and spectroscopic studies of alkali-metal exchanged stilbites

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

Institute of Earth·Atmosphere·Astronomy(BK21+)

Research output: Contribution to journal › Article › peer-review

6 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 language	English
Pages (from-to)	339-348
Number of pages	10
Journal	Microporous and Mesoporous Materials
Volume	224
DOIs	https://doi.org/10.1016/j.micromeso.2016.01.005
Publication status	Published - 2016 Apr

Bibliographical note

Funding Information:
This work was supported by the Global Research Laboratory ( NRF-2009-00408 ) and National Research Laboratory ( NRF-2015R1A2A1A01007227 ) Programs of the Korean Ministry of Science, ICT and Planning (MSIP) . The use of the U2A beamline at the National Synchrotron Light Source beamline is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR 06-49658 and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-98CH10886 . Y.M. thanks the support from the BK21Plus Institute of Earth, Astronomy, and Atmospheric Sciences of Yonsei University , and the National Natural Science Foundation of China (Grant 11304114 ). T.V. thanks the Australian Nuclear Science and Technology Organization for support during an extended research visit.

Publisher Copyright:
© 2016 Elsevier Inc. All rights reserved.

All Science Journal Classification (ASJC) codes

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

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10.1016/j.micromeso.2016.01.005

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@article{ed57ca2c652a4d8aa5ff9abe86ac9aaa,

title = "Structural and spectroscopic studies of alkali-metal exchanged stilbites",

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) {\AA} 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.",

author = "Yanmei Ma and Zhenxian Liu and Aihui Geng and Thomas Vogt and Yongjae Lee",

note = "Funding Information: This work was supported by the Global Research Laboratory ( NRF-2009-00408 ) and National Research Laboratory ( NRF-2015R1A2A1A01007227 ) Programs of the Korean Ministry of Science, ICT and Planning (MSIP) . The use of the U2A beamline at the National Synchrotron Light Source beamline is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR 06-49658 and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-98CH10886 . Y.M. thanks the support from the BK21Plus Institute of Earth, Astronomy, and Atmospheric Sciences of Yonsei University , and the National Natural Science Foundation of China (Grant 11304114 ). T.V. thanks the Australian Nuclear Science and Technology Organization for support during an extended research visit. Publisher Copyright: {\textcopyright} 2016 Elsevier Inc. All rights reserved.",

year = "2016",

month = apr,

doi = "10.1016/j.micromeso.2016.01.005",

language = "English",

volume = "224",

pages = "339--348",

journal = "Microporous Materials",

issn = "1387-1811",

publisher = "Elsevier",

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T1 - Structural and spectroscopic studies of alkali-metal exchanged stilbites

AU - Ma, Yanmei

AU - Liu, Zhenxian

AU - Geng, Aihui

AU - Vogt, Thomas

AU - Lee, Yongjae

N1 - Funding Information: This work was supported by the Global Research Laboratory ( NRF-2009-00408 ) and National Research Laboratory ( NRF-2015R1A2A1A01007227 ) Programs of the Korean Ministry of Science, ICT and Planning (MSIP) . The use of the U2A beamline at the National Synchrotron Light Source beamline is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR 06-49658 and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-98CH10886 . Y.M. thanks the support from the BK21Plus Institute of Earth, Astronomy, and Atmospheric Sciences of Yonsei University , and the National Natural Science Foundation of China (Grant 11304114 ). T.V. thanks the Australian Nuclear Science and Technology Organization for support during an extended research visit. Publisher Copyright: © 2016 Elsevier Inc. All rights reserved.

PY - 2016/4

Y1 - 2016/4

N2 - 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.

AB - 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.

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VL - 224

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EP - 348

JO - Microporous Materials

JF - Microporous Materials

ER -

Structural and spectroscopic studies of alkali-metal exchanged stilbites

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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