Relaxations in confinement as probed by solvation dynamics

H. Wendt, Ranko Richert

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations

Abstract

Solvation dynamics data of the probe quinoxaline in the glass-forming liquid 2-methyltetrahydrofuran (MTHF) is employed to study the orientational dynamics of a liquid which is geometrically confined by porous glasses. In order to discriminate pure confinement from interfacial effects, we compare in detail the relaxation results obtained in pores with native and silanized glass surfaces with those for the bulk liquid. For the present case of highly viscous MTHF near T g, the molecular orientation in silanized pores is almost identical to that observed in the bulk liquid. This indicates that confinement effects remain small and that the interfacial interaction between liquid molecules and the pore wall can dominate and are strongly affected by the surface chemistry. We also demonstrate how solvation dynamics techniques can be used to measure the dynamics selectively at the interface.

Original languageEnglish (US)
Title of host publicationJournal De Physique. IV : JP
PublisherEditions de Physique
Volume10
Edition7
StatePublished - 2000
EventInternational Workshop on Dynamics in Confinement - Grenoble, France
Duration: Jan 26 2000Jan 29 2000

Other

OtherInternational Workshop on Dynamics in Confinement
CityGrenoble, France
Period1/26/001/29/00

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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