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V. G. Arakcheev and V. B. Morozov CARS diagnostics of fluid phase behavior in small mesopores at near-critical temperatures Journal of Raman Spectroscopy 44

Article first published online: 9 APR 2013 | DOI: 10.1002/jrs.4289

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Coherent anti-Stokes Raman scattering spectroscopy is applied to investigate the fluid phase behavior in small mesopores with radii of 2 and 3 nm at bulk sub- and supercritical temperatures. The spectral transformations with pressure indicate the formation of a condensed phase inside pores at both temperatures pointing out the shift of critical point of the fluid. The spectrum of carbon dioxide condensed in the wider pores corresponds approximately to the critical density in bulk. In narrower pores, the spectrum is red-shifted that corresponds to higher density of condensed fluid.

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