摘要
利用激光拉曼光谱监测正二十烷相变过程中的有序无序变化。发现位于1 300 cm-1处谱峰的积分强度在相变温度区间发生较大变化,这与以前相关的理论及实验工作存在较大区别,由此讨论了1 300cm-1谱峰在有机物及生物膜结构的拉曼光谱实验中作为参考峰的局限性。此外,由于序参量可以定量的标定有机物及生物膜结构中各种有序无序结构的含量,所以成为现在拉曼光谱研究中的一个热点问题。Meier对于有机物拉曼光谱研究中长时间以来一直使用的序参量定义提出了质疑,文章的相关实验支持了Meier的看法,并从实验证据上表明了惯用序参量定义的有限性。
Raman spectroscopy was used to investigate the order-disorder phase transition of n-eicosane for real-time cooling run. At the phase transition temperature, the integrated intensity of the 1 300 cm^-1 spectra range changes greatly, which requires further consideration of 1 300 cm ^-1 as a reference in the research on polymer and biomembrane using Raman spectroscopy. The experiment support was provided for doubt about order parameter based on 1 130 cm^-1 that it did not refer to generally accepted interpretation of an order parameter and it proved that the order definition could just be used as a relative measure method for disorder.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期1562-1565,共4页
Spectroscopy and Spectral Analysis
基金
国家重点基础研究发展计划项目(20096930504)资助
关键词
正二十烷
拉曼光谱
序参量
n-Eicosane
Raman spectroscopy
Order parameter
