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

SURANGA, P. A., WICKRAMARACHCHI, P. A. S. R., SPELLS, S. and DE SILVA, D. S. M. (2006). Study of disorder in different phases of tetratriacontane and a binary alkane mixture using vibrational spectroscopy. Journal of physical chemistry B, 111 (7), 1604-1609.

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Link to published version:: 10.1021/jp066207h

Abstract

Raman spectroscopy has been used to investigate the monoclinic crystal f rotator f 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
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: Ann Betterton
Date Deposited: 08 Aug 2007
Last Modified: 09 Aug 2010 14:07
URI: http://shura.shu.ac.uk/id/eprint/940

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