Anomalous hydrogen bond strengthening and molecular reorientations guiding high-pressure phases of ammonium perchlorate.

Authors

Harsha Kumawat, S R Vishwakarma, Himal Bhatt

Published in

Physical chemistry chemical physics : PCCP. Oct 09, 2026. Epub Oct 09, 2026.

Abstract

The first systematic high-pressure IR study reveals that anomalous hydrogen-bond strengthening and suppression of NH₄⁺ reorientations stabilize NH₄ClO₄, a dominant oxidizer in solid propellants, above 1 GPa. At 4.8 GPa, perchlorate reorientations drive the second transition, which is completed at 10 GPa. These findings resolve persistent ambiguities in the structural evolution of NH₄ClO₄ to advance the understanding of its phase diagram and thermodynamics.

PMID:
42853031
Bibliographic data and abstract were imported from PubMed on 09 Oct 2026.

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