Raman scattering spectroscopic study of n-tetradecane under high pressure and ambient temperature.
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.
Jian
Xing
X
Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, PR China.
Zheng
Haifei
H
D000473:Alkanes / Q000737:chemistry*; D006586:Hexanes / Q000737:chemistry; D010420:Pentanes / Q000737:chemistry; D044367:Phase Transition; D011312:Pressure; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014732:Vibration
D000473:Alkanes; D006586:Hexanes; D010420:Pentanes; C024713:n-tetradecane