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Transformation of hydrazinium azide to molecular N8 at 40 GPa

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5021976· OSTI ID:1432864
Hydrazinium azide (HA) has been investigated at high pressures to 68 GPa using confocal micro-Raman spectroscopy and synchrotron powder x-ray diffraction. The results show that HA undergoes structural phase transitions from solid HA-I to HA-II at 13 GPa, associated with the strengthening of hydrogen bonding, and then to N8 at 40 GPa. The transformation of HA to recently predicted N8 (N≡N+—N–—N=N—–N—+N≡N) is evident by the emergence of new peaks at 2384 cm–1, 1665 cm–1, and 1165 cm–1, arising from the terminal N≡N stretching, the central N=N stretching, and the N—N stretching, respectively. Furthermore, upon decompression, N8 decomposes to ε-N2 below 25 GPa, but the remnant can be seen as low as 3 GPa.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Research Foundation; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001974
OSTI ID:
1432864
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 13 Vol. 148; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (2)

Beyond molecular nitrogen: revelation of two ambient-pressure metastable single- and double-bonded nitrogen allotropes built from three-membered rings journal January 2019
Nanosecond-pulsed spark discharge plasma in liquid nitrogen: synthesis of polynitrogen from NaN 3 journal August 2019

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