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 language | English (US) |
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Title of host publication | Journal De Physique. IV : JP |
Publisher | Editions de Physique |
Volume | 10 |
Edition | 7 |
State | Published - 2000 |
Event | International Workshop on Dynamics in Confinement - Grenoble, France Duration: Jan 26 2000 → Jan 29 2000 |
Other
Other | International Workshop on Dynamics in Confinement |
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City | Grenoble, France |
Period | 1/26/00 → 1/29/00 |
ASJC Scopus subject areas
- General Physics and Astronomy