Jump to main content
Jump to site search

Issue 21, 2016
Previous Article Next Article

Hydrogen dynamics in β-Mg(BH4)2 on the picosecond timescale

Author affiliations

Abstract

A quasielastic neutron scattering study on β-Mg(BH4)2 has been performed to investigate the hydrogen dynamics on the picosecond time-scale. Both vibrational and rotational motions of the [BH4] tetrahedra contribute to the signal at low energy transfers. A comprehensive analysis of the elastic and quasielastic incoherent structure factors allowed the separation of different parts. Below 200 K, vibrations and rotations (around the C2 or C3 symmetry axis of the [BH4] tetrahedra) are well separated. Above that temperature, a transition is observed in the vibrational part, and the spectral weight is shifted towards the quasielastic region. The dynamic transition is not accompanied by any structural phase change but we suggest that it is correlated with the anomalous thermal expansion that has been reported for β-Mg(BH4)2 [Filinchuk, et al., Chem. Mater., 2009, 21, 925].

Graphical abstract: Hydrogen dynamics in β-Mg(BH4)2 on the picosecond timescale

Back to tab navigation

Article information


Submitted
13 Feb 2016
Accepted
19 Apr 2016
First published
26 Apr 2016

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 14323-14332
Article type
Paper

Hydrogen dynamics in β-Mg(BH4)2 on the picosecond timescale

L. Silvi, E. Röhm, M. Fichtner, W. Petry and W. Lohstroh, Phys. Chem. Chem. Phys., 2016, 18, 14323
DOI: 10.1039/C6CP00995F

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements