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Title: In Situ High-Pressure Study of Ammonia Borane by Raman and IR Spectroscopy

Abstract

Pressure-induced structural transformations of the ammonia borane complex (NH3{center_dot}BH3) were investigated in diamond anvil cells by Raman spectroscopy and synchrotron IR spectroscopy up to 14 GPa at room temperature. Starting with a disordered tetragonal structure, NH3{center_dot}BH3 is found to undergo several transformations upon compression as monitored by in situ Raman measurements. These transformations are indicated by the sequential changes of characteristic Raman modes as well as by the pressure dependence of these modes. Synchrotron IR absorption spectroscopy provided supplementary and consistent information about the structural evolution of NH3{center_dot}BH3 under compression. Decompression measurements on NH3{center_dot}BH3 suggest the pressure-induced transformations are reversible in the entire pressure region. The combined Raman and IR data allowed analysis of possible high-pressure structures of NH3{center_dot}BH3. Our study significantly complements previous high-pressure Raman studies by providing new information on the structures and stabilities of NH3{center_dot}BH3.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
980257
Report Number(s):
BNL-93175-2010-JA
Journal ID: ISSN 0008-4042; CJCHAG; TRN: US1005449
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Canadian Journal of Chemistry
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Journal ID: ISSN 0008-4042
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ABSORPTION SPECTROSCOPY; AMMONIA; BORANES; COMPRESSION; DIAMONDS; PRESSURE DEPENDENCE; RAMAN SPECTROSCOPY; SPECTROSCOPY; SYNCHROTRONS; TRANSFORMATIONS; INFRARED SPECTROMETERS; national synchrotron light source

Citation Formats

Xie, S, Song, Y, and Liu, Z. In Situ High-Pressure Study of Ammonia Borane by Raman and IR Spectroscopy. United States: N. p., 2009. Web. doi:10.1139/V09-114.
Xie, S, Song, Y, & Liu, Z. In Situ High-Pressure Study of Ammonia Borane by Raman and IR Spectroscopy. United States. https://doi.org/10.1139/V09-114
Xie, S, Song, Y, and Liu, Z. 2009. "In Situ High-Pressure Study of Ammonia Borane by Raman and IR Spectroscopy". United States. https://doi.org/10.1139/V09-114.
@article{osti_980257,
title = {In Situ High-Pressure Study of Ammonia Borane by Raman and IR Spectroscopy},
author = {Xie, S and Song, Y and Liu, Z},
abstractNote = {Pressure-induced structural transformations of the ammonia borane complex (NH3{center_dot}BH3) were investigated in diamond anvil cells by Raman spectroscopy and synchrotron IR spectroscopy up to 14 GPa at room temperature. Starting with a disordered tetragonal structure, NH3{center_dot}BH3 is found to undergo several transformations upon compression as monitored by in situ Raman measurements. These transformations are indicated by the sequential changes of characteristic Raman modes as well as by the pressure dependence of these modes. Synchrotron IR absorption spectroscopy provided supplementary and consistent information about the structural evolution of NH3{center_dot}BH3 under compression. Decompression measurements on NH3{center_dot}BH3 suggest the pressure-induced transformations are reversible in the entire pressure region. The combined Raman and IR data allowed analysis of possible high-pressure structures of NH3{center_dot}BH3. Our study significantly complements previous high-pressure Raman studies by providing new information on the structures and stabilities of NH3{center_dot}BH3.},
doi = {10.1139/V09-114},
url = {https://www.osti.gov/biblio/980257}, journal = {Canadian Journal of Chemistry},
issn = {0008-4042},
number = 9,
volume = 87,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}