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

页码：953 / 961

页数：9

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