Pressure-induced structural transition inn-pentane: A Raman study

Kavitha, G. ; Narayana, Chandrabhas (2007) Pressure-induced structural transition inn-pentane: A Raman study The Journal of Physical Chemistry B, 111 (25). pp. 7003-7008. ISSN 1089-5647

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Pressure-induced Raman spectroscopy studies on n-pentane have been carried out up to 17 GPa at ambient temperature. n-Pentane undergoes a liquid−solid transition around 3.0 GPa and a solid−solid transition around 12.3 GPa. The intensity ratio of the Raman modes related to all-trans conformation (1130 cm-1 and 2850 cm-1) to that of gauche conformation (1090 cm-1 and 2922 cm-1) suggests an increase in the gauche population conformers above 12.3 GPa. This is accompanied with broadening of Raman modes above 12.3 GPa. The high-pressure phase of n-pentane above 12.3 GPa is a disordered phase where the carbon chains are kinked. The pressure-induced order−disorder phase transition is different from the behavior of higher hydrocarbon like n-heptane.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:113621
Deposited On:23 Apr 2018 11:11
Last Modified:23 Apr 2018 11:11

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