Raman scattering spectroscopic study of n-tetradecane under high pressure and ambient temperature

Xing Jian; Haifei Zheng

doi:10.1016/j.saa.2008.09.002

Raman scattering spectroscopic study of n-tetradecane under high pressure and ambient temperature

Spectrochim Acta A Mol Biomol Spectrosc. 2009 Feb;72(1):214-7. doi: 10.1016/j.saa.2008.09.002. Epub 2008 Sep 19.

Authors

Xing Jian¹, Haifei Zheng

Affiliation

¹ Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, PR China.

PMID: 18977687
DOI: 10.1016/j.saa.2008.09.002

Abstract

The Raman spectroscopy of n-tetradecane was investigated in a Moissanite anvil cell at pressure from 0.1 MPa to 1.4 GPa and ambient temperature. The result shows that the liquid-solid phase transition of n-tetradecane takes place at around 302.8 MPa and the corresponding DeltaV(m) obtained is about -9.6 cm(-3)/mol. Above 302.8 MPa, the frequencies of CH(2) and CH(3) symmetric stretching and asymmetric stretching vibration shift to higher wave numbers in a linear manner with increasing pressure, which can be expressed as: nu(s)(CH(3))=0.013P+2882.0; nu(as)(CH(3))=0.014P+2961.6; nu(s)(CH(2))=0.013P+2850.8; nu(as)(CH(2))=0.009P+2923.2. This relationship indicates that n-tetradecane can be a reliable pressure gauge for the experimental study within the pressure range of 0.3-1.4 GPa.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alkanes / chemistry*
Hexanes / chemistry
Pentanes / chemistry
Phase Transition
Pressure*
Scattering, Radiation*
Spectrum Analysis, Raman*
Temperature*
Vibration

Substances

Alkanes
Hexanes
Pentanes
n-tetradecane