Pressure-induced structural changes in Methylamine borane and dimethylamine borane

被引：3
|
作者：
Szilagyi, Petra A. [1 ]
Hunter, Steven [2 ,3 ,4 ]
Morrison, Carole A. [2 ,3 ]
Tang, Chiu C. [5 ]
Pulham, Colin R. [2 ,3 ,4 ]
机构：
[1] Univ Greenwich, Medway Campus, Chatham ME4 4TB, Kent, England
[2] Univ Edinburgh, Sch Chem, Kings Bldg,West Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotland
[3] Univ Edinburgh, EaStCHEM Res Sch, Kings Bldg,West Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotland
[4] Univ Edinburgh, Ctr Sci, Extreme Condit, Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland
[5] Diamond Light Source Ltd, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 722卷
基金：
英国工程与自然科学研究理事会;
关键词：
Hydrogen storage; Phase transition; High pressure; Synchrotron X-ray powder diffraction; HYDROGEN-STORAGE MATERIALS; X-RAY-DIFFRACTION; AMMONIA-BORANE; MAGNESIUM BOROHYDRIDE; CATALYTIC DEHYDROCOUPLING/DEHYDROGENATION; THERMAL-DECOMPOSITION; CRYSTAL-STRUCTURE; DEHYDROGENATION; METAL; RAMAN;
D O I：
10.1016/j.jallcom.2017.06.174
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 space-group 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. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：953 / 961
页数：9
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