Molecular dynamics of ethylene glycol adsorbed in NaX:: NMR and broadband dielectric spectroscopy studies

被引：6

作者：

Erdem, ÖF ^{[1
]}

Michel, D ^{[1
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 418卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2005.10.110

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Proton spin relaxation and broadband dielectric spectroscopy are applied to study the dynamics of ethylene glycol adsorbed in NaX, EG/NaX. The molecular mobility strongly depends on the pore filling factor which may be controlled by high-resolution H-1 MAS NMR measurements. Although EG in bulk shows a Vogel-Fulcher-Tammann type of activation, temperature dependent relaxation rate measurements for the EG/NaX systems always follow an Arrhenius plot, independent of the loading degree. There is no hint to a glass-forming behaviour of EG/NaX which could be understood in terms of the strong influence of surface-molecule interactions playing a dominant role compared to the molecule-molecule interactions. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：454 / 458

页数：5

共 34 条

[1] Influence of framework silicon to aluminium ratio on aluminium coordination and distribution in zeolite Beta investigated by 27Al MAS and 27Al MQ MAS NMR [J].

Abraham, A ;

Lee, SH ;

Shin, CH ;

Hong, SB ;

Prins, R ;

van Bokhoven, JA .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2004, 6 (11) :3031-3036

[2] Confinement of molecular liquids: Consequences on thermodynamic, static and dynamical properties of benzene and toluene [J].

Alba-Simionesco, C ;

Dosseh, G ;

Dumont, E ;

Frick, B ;

Geil, B ;

Morineau, D ;

Teboul, V ;

Xia, Y .

EUROPEAN PHYSICAL JOURNAL E, 2003, 12 (01) :19-28

[3] Temperature, density, and pressure dependence of relaxation times in supercooled liquids [J].

Alba-Simionesco, C ;

Kivelson, D ;

Tarjus, G .

JOURNAL OF CHEMICAL PHYSICS, 2002, 116 (12) :5033-5038

[4] FORMATION OF GLASSES FROM LIQUIDS AND BIOPOLYMERS [J].

ANGELL, CA .

SCIENCE, 1995, 267 (5206) :1924-1935

[5]

[Anonymous], J POLYM SCI C, DOI [10.1002/polc.5070140111, DOI 10.1002/POLC.5070140111]

[6] Length scale of cooperativity in the dynamic glass transition [J].

Arndt, M ;

Stannarius, R ;

Groothues, H ;

Hempel, E ;

Kremer, F .

PHYSICAL REVIEW LETTERS, 1997, 79 (11) :2077-2080

[7] Dielectric investigations of the dynamic glass transition in nanopores [J].

Arndt, M ;

Stannarius, R ;

Gorbatschow, W ;

Kremer, F .

PHYSICAL REVIEW E, 1996, 54 (05) :5377-5390

[8] Cyclohexane and benzene confined in MCM-41 and SBA-15: Confinement effects on freezing and melting [J].

Dosseh, G ;

Xia, YD ;

Alba-Simionesco, C .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (26) :6445-6453

[9]

Engelhardt G., 1987, HIGH RESOLUTION SOLI

[10] 1H MAS NMR investigations of ethylene glycol adsorbed in NaX [J].

Erdem, ÖF ;

Michel, D .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (24) :12054-12061

← 1 2 3 4 →