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Pressure-induced structural changes in methylamine borane and dimethylamine borane

Pressure-induced structural changes in methylamine borane and dimethylamine borane

Szilágyi, Petra Á., Hunter, Steven, Morrison, Carole A., Tang, Chiu C. and Pulham, Colin R. (2017) Pressure-induced structural changes in methylamine borane and dimethylamine borane. Journal of Alloys and Compounds, 722. pp. 953-961. ISSN 0925-8388 (doi:10.1016/j.jallcom.2017.06.174)

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Abstract

Methylamine borane and dimethylamine borane have been studied under compression to 3 GPa using Raman spectroscopy and synchrotron powder X-ray diffraction. Both undergo reversible pressure-induced structural changes in this pressure range. The structural changes in the case of methylamine borane may be indicative of a second-order phase transition, taking place between ca. 0.8-1.2 GPa, which does not result in a change of spacegroup symmetry. In the case of dimethylamine borane, however, a reversible, reconstructive phase transition (monoclinic → orthorhombic) occurs below 0.7 GPa. This new high-pressure phase was successfully indexed, with a possible space group assignment of Pccn or Pbcn.

Item Type: Article
Uncontrolled Keywords: Hydrogen storage, Phase transition, High pressure, Synchrotron X-ray powder diffraction
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Pharmaceutical, Chemical & Environmental Sciences
Last Modified: 25 Sep 2017 14:21
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/17437

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