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.
引用
收藏
页码：256 / 262
页数：7
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