Diffusion Dynamics of Water Molecules in a LiCl Solution: A Low-Temperature Crossover

被引：35

作者：

Mamontov, Eugene ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 43期

关键词：

GLASS-TRANSITION TEMPERATURES; ELASTIC NEUTRON-SCATTERING; MODE-COUPLING THEORY; SUPERCOOLED WATER; HYDRATION WATER; HOMOGENEOUS NUCLEATION; STRUCTURAL RELAXATION; LIQUID TRANSITION; CONFINED WATER; PHASE;

D O I：

10.1021/jp904734y

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：

A quasielastic neutron scattering experiment probing the dynamics of water molecules on the pico- to nanosecond time scale in An aqueous solution of lithium chloride has detected a crossover at about 220-230 K between the high-temperature non-Arrhenius and low-temperature Arrhenius behavior. This is the first experiment where the crossover in the dynamics of water molecules is detected in bulk rather than in confinement. The results suggest that the dynamic crossover observed in the current and many recent experiments is not linked to the specific properties of water; instead, it may represent a more general dynamic transition.

引用

页码：14073 / 14078

页数：6

共 71 条

[1] HOMOGENEOUS NUCLEATION AND GLASS-TRANSITION TEMPERATURES IN SOLUTIONS OF LI SALTS IN D2O AND H2O - DOUBLY UNSTABLE GLASS REGIONS [J].

ANGELL, CA ;

SARE, EJ ;

DONNELLA, J ;

MACFARLANE, DR .

JOURNAL OF PHYSICAL CHEMISTRY, 1981, 85 (11) :1461-1464

[2] GLASS-FORMING COMPOSITION REGIONS AND GLASS TRANSITION TEMPERATURES FOR AQUEOUS ELECTROLYTE SOLUTIONS [J].

ANGELL, CA ;

SARE, EI .

JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (03) :1058-&

[3] Anion-anion pairing in concentrated aqueous lithium chloride solution [J].

Ansell, S ;

Neilson, GW .

JOURNAL OF CHEMICAL PHYSICS, 2000, 112 (09) :3942-3944

[4] CONTRIBUTIONS OF TORSIONAL BRAID ANALYSIS TO TLL [J].

BOYER, RF .

POLYMER ENGINEERING AND SCIENCE, 1979, 19 (10) :732-748

[5]

Cerveny S, 2007, EUR PHYS J-SPEC TOP, V141, P49, DOI [10.1140/epjst/e2007-00015-1, 10.1141/epjst/e2007-00009-y]

[6] Comment on "Pressure dependence of fragile-to-strong transition and a possible second critical point in supercooled confined water" [J].

Cerveny, Silvina ;

Colmenero, Juan ;

Alegria, Angel .

PHYSICAL REVIEW LETTERS, 2006, 97 (18)

[7] Experimental evidence of fragile-to-strong dynamic crossover in DNA hydration water [J].

Chen, S. -H. ;

Liu, L. ;

Chu, X. ;

Zhang, Y. ;

Fratini, E. ;

Baglioni, P. ;

Faraone, A. ;

Mamontov, E. .

JOURNAL OF CHEMICAL PHYSICS, 2006, 125 (17)

[8] Observation of fragile-to-strong dynamic crossover in protein hydration water [J].

Chen, S. -H. ;

Liu, L. ;

Fratini, E. ;

Baglioni, Piero ;

Faraone, A. ;

Mamontov, E. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (24) :9012-9016

[9] Model for single-particle dynamics in supercooled water [J].

Chen, SH ;

Liao, C ;

Sciortino, F ;

Gallo, P ;

Tartaglia, P .

PHYSICAL REVIEW E, 1999, 59 (06) :6708-6714

[10] Chen, Liu, and Faraone reply [J].

Chen, Sow-Hsin ;

Liu, Li ;

Faraone, A. .

PHYSICAL REVIEW LETTERS, 2006, 97 (18)

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