This article is part of the Journal of Raman Spectroscopy special issue entitled Proceedings of the 9th European Conference on Nonlinear Optical Spectroscopy (ECONOS), Bremen, Germany, June 21-23, 2010 edited by Peter Radi, PSI, Villigen, Switzerland, and Arnulf Materny, Jacobs University, Bremen, Germany.
CARS diagnostics of fluid adsorption and condensation in small mesopores†
Article first published online: 16 JUN 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 42, Issue 9, pages 1747–1753, September 2011
How to Cite
Andreeva, O. V., Arakcheev, V. G., Bagratashvili, V. N., Morozov, V. B., Popov, V. K. and Valeev, A. A. (2011), CARS diagnostics of fluid adsorption and condensation in small mesopores. J. Raman Spectrosc., 42: 1747–1753. doi: 10.1002/jrs.2979
- Issue published online: 19 SEP 2011
- Article first published online: 16 JUN 2011
- Manuscript Accepted: 8 APR 2011
- Manuscript Received: 20 DEC 2010
- molecular fluid;
- phase behavior
Coherent anti-Stokes Raman scattering (CARS) spectroscopy is applied to diagnostics of phase behavior of a fluid in pores of nanoporous glasses. Samples with mean pore radii of 2 and 3.5 nm were filled with compressed carbon dioxide at near-room temperatures. CARS spectra of the 1388 cm−1 Q-branch were measured at isothermal compressing in a wide pressure range including the transition from gaseous to condensed state. The spectra show specific transformations caused by fluid adsorption and condensation in nanopores. We have carried out calculations of the spectral profiles based on the phase behavior of carbon dioxide in cylindrical glass nanopores. Phase behavior modeling was performed using thermodynamic concepts of surface adsorption and capillary condensation. A good agreement between experimental spectra and calculations was obtained. The potential of CARS technique for the diagnostics of fluid phase behavior in pores and for the characterization of nanoporous host structure is discussed. Copyright © 2011 John Wiley & Sons, Ltd.