Study of disorder in different phases of tetratriacontane and a binary alkane mixture, using vibrational spectroscopy

WICKRAMARACHCHI, P. A. S. R., SPELLS, S. J. and DE SILVA, D. S. M. (2007). Study of disorder in different phases of tetratriacontane and a binary alkane mixture, using vibrational spectroscopy. The Journal of Physical Chemistry B, 111 (7), 1604-1609.

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Abstract

Raman spectroscopy has been used to investigate the monoclinic crystal -> rotator -> melt phase transitions in n-C34H70, for both real-time heating and cooling runs. Changes in band intensity and frequency in the CH2 bending, CH2 twisting, skeletal C-C stretching, and CH3 rocking regions revealed both transitions, particularly when using band components related to gauche bonds. In the room temperature infrared spectrum, the CH2 rocking-twisting and CH2 wagging progressions were observed and indexed for n-C34H70 and a 2:1 (w/w) mixture of C34H70 and C36D74. This led to best estimates for the all-trans crystal core in both cases of 33 to 34 carbon atoms, indicating that the core corresponds to almost the whole of the C34H70 molecule.

Item Type:	Article
Additional Information:	Wickramarachchi, P. A. Suranga R. Spells, Stephen J. de Silva, D. Sujeewa M.
Research Institute, Centre or Group:	Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre > Polymers, Composites and Spectroscopy Group
Identification Number:	10.1021/jp066207h
Depositing User:	Hilary Ridgway
Date Deposited:	12 May 2010 10:54
Last Modified:	29 Sep 2010 09:46
URI:	http://shura.shu.ac.uk/id/eprint/1821

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