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Start Over Author "Williams, Darren L." Journal journal of physical chemistry a
2 results on '"Williams, Darren L."'

1. High-resolution infrared studies of Al(BH4)3 and Al(BD4)3

Author

Al-Kahtani, Abdullah, Williams, Darren L., Nibler, Joseph W., and Sharpe, Steven W.

Subjects
Infrared spectroscopy -- Usage, Aluminum compounds -- Analysis, Vibrational spectra -- Analysis, Borane -- Analysis, Chemicals, plastics and rubber industries
Abstract

High-resolution Fourier-transform infrared spectra of Al(BH4)3 and Al(BD4)3 were obtained for low-pressure samples at room temperature. Results indicated only wide vibrational bands with no resolved rotational structure. The BH bridge stretching and the BH2 deformation areas were also analyzed at 0.001/cm resolution through tunable infrared diode laser spectroscopy for samples cooled to about 10 K in a multipass, slit expansion. Results showed near continua, with much more crowding than predicted by nonrigid rotor simulations based on boron isotopic shifts.

Published
1998

2. UV induced degradation rates of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)

Author

Williams, Darren L., Timmons, James C., Woodyard, James D., Rainwater, Ken A., Heh, John L., Lightfoot, James M., Richardson, Ben R., and Burgess, Caroline E.

Subjects
Electron paramagnetic resonance spectroscopy -- Research, Benzene -- Research, Chemicals, plastics and rubber industries
Abstract

The photolytic degradation and radical production rates in TATB are studied as a function of 24 different combinations of humidity, temperature, and illumination. A substantial amount of radicals can be generated with UV light, and efforts are being made to modify EPR spectrometer so that TATB can be irradiated in the EPR cavity to measure the initial rates of radical production.

Published
2003

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