Nuclear-Magnetic-Resonance Measurements Reveal the Origin of the Debye Process in Monohydroxy Alcohols

被引：162

作者：

Gainaru, C. ^{[1
]}

Meier, R. ^{[2
]}

Schildmann, S. ^{[1
]}

Lederle, C. ^{[1
]}

Hiller, W. ^{[3
]}

Roessler, E. A. ^{[2
]}

Boehmer, R. ^{[1
]}

机构：

[1] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

[2] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

[3] Tech Univ Dortmund, Fak Chem, D-44221 Dortmund, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 25期

关键词：

HYDROGEN-BONDED LIQUIDS; GLASS-FORMING LIQUIDS; DIELECTRIC-RELAXATION; MAGNETIC-RELAXATION; DYNAMICS; PROPANOL; BUTANOL; WATER; SIMULATIONS; 1-PROPANOL;

D O I：

10.1103/PhysRevLett.105.258303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Monohydroxy alcohols show a structural relaxation and at longer time scales a Debye-type dielectric peak. From spin-lattice relaxation experiments using different nuclear probes, an intermediate, slower-than-structural dynamics is identified for n-butanol. Based on these findings and on translational diffusion measurements, a model of self-restructuring, transient chains is proposed. The model is demonstrated to explain consistently the so-far puzzling observations made for this class of hydrogen-bonded glass forming liquids.

引用

页数：4

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