Origin of the complex molecular dynamics in functionalized discotic liquid crystals

被引：52

作者：

Elmahdy, M. M. ^{[1
,2
]}

Floudas, G. ^{[1
,2
]}

Mondeshki, M. ^{[3
]}

Spiess, H. W. ^{[3
]}

Dou, X. ^{[3
]}

Muellen, K. ^{[3
]}

机构：

[1] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece

[2] Biomed Res Inst, FORTH, Ioannina, Greece

[3] Max Planck Inst Polymer Res, D-55021 Mainz, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.100.107801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The molecular dynamics of three dipole functionalized hexa-peri-hexabenzocoronenes have been studied using site-specific NMR techniques and dielectric spectroscopy as a function of temperature and pressure. These probes (i) suggest that the thermodynamic state completely controls the dynamic response, (ii) clarify the origin of two dynamic processes associated with the presence of two glass temperatures, and (iii) provide the first phase diagram for substances of this kind.

引用

页数：4

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