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Temperature Induced Structural Transformations and Gas Adsorption in the Zeolitic Imidazolate Framework ZIF-8: A Raman Study
Abstract
Here we have used Raman spectroscopy to investigate molecular level changes in the zeolitic imidazolate framework ZIF-8 (a prototypical zeolite-like porous metal organic framework) as a function of temperature. Temperature dependent Raman spectra suggest that at low temperature the softening of the C-H stretching frequencies is due to the decrease in steric hindrance between the methyl groups of methyl imidazole. The larger separation between the methyl groups opens the window for increased nitrogen and methane uptake at temperatures below 153 K. The appearance of Raman bands at 2323 cm(-1) and 2904 cm(-1) at or below 153 K in ZIF-8 are characteristic signatures of the adsorbed nitrogen and methane gases respectively. Nanoscale ZIF-8 uptakes more molecules than bulk ZIF-8, and as a result we could provide evidence for encaged CO2 at 203 K yielding its Raman mode at 1379 cm(-1).
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Cited by
Surface and Stability Characterization of a Nanoporous ZIF-8 Thin Film
Tian, F., Cerro, A. M., Mosier, A. M., Wayment-Steele, H. K., Shine, R. S., Park, A., Webster, E. R., Johnson, L. E., Johal, M. S., & Benz, L. (2014) · The Journal of Physical Chemistry C · doi:10.1021/jp5041053 · Cited by 284
Gating effect for gas adsorption in microporous materials—mechanisms and applications
Chen, K., Mousavi, S. H., Singh, R., Snurr, R. Q., Li, G., & Webley, P. A. (2022) · Chemical Society Reviews · doi:10.1039/d1cs00822f · Cited by 133
Metadata
- Authors
- Kumari, G., Jayaramulu, K., Maji, T. K., & Narayana, C.
- Venue
- The Journal of Physical Chemistry A
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-10-22
- Volume
- 117
- Issue
- 43
- Pages
- 11006-11012
- ISSN
- 1089-5639 (ISSN-L)
- 1520-5215
- OpenAlex
- W2332476586
- Cited by
- 324
- References
- 0
- FWCI
- 5.50
- Type
- journal article
- Language
- en
- Open access
- closed
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