Low-energy vibrational modes in phenylene oligomers studied by THz time-domain spectroscopy

被引：88

作者：

Johnston, MB

Herz, LM

Khan, ALT

Köhler, A

Davies, AG

Linfield, EH

机构：

[1] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[3] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 377卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(03)01136-9

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：

Low-energy vibrational modes have been investigated in polycrystalline biphenyl, para-terphenyl, para-quaterphenyl and para-sexiphenyl using THz time-domain spectroscopy (THz-TDS). A number of both internal and external infrared-active modes were observed for wavenumbers ranging between 20 and 80 cm(-1). The temperature dependence of these modes is consistent with structural phase transitions occurring in the molecular crystal, indicating that THz-TDS is a sensitive probe of the conformation of conjugated molecular systems. (C) 2003 Elsevier B.V. All rights reserved.

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页码：256 / 262

页数：7

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