TIME-RESOLVED FOURIER TRANSFORM INFRARED EMISSION SPECTRA OF HNC/HCN
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Date
2007
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Ohio State University
Abstract
A continuously scanning FT spectrometer (Bruker IFS 120 HR) has been applied for observing time-resolved spectra after pulse phenomena by a multi-sampling method with a help of a chip computer SX} \textbf{369}, 293(2003)}. In the present study, we used a pulse discharge with a duration of 40 $\mu$sec in a mixture of N$_2$ (120 mTorr) and CH$_4$ (15 mTorr) to produce HNC and HCN emissions which were monitored by the $\nu$$_1$ bands (C-H stretch in HCN or NH stretch in HNC) with a resolution of 0.06 cm$^{-1}$. The cell was cooled down by liquid nitrogen or dryice. Thirty data were collected to produce 30 interferograms with a 2 $\mu$sec interval. The emission intensities from v$_1$ = 1 of HCN and HNC decreased for 15 $\mu$sec after turning off the discharge and increased later. The emission from v$_1$ = 2 of HCN showed similar time profile as the v$_1$ = 1 emission. However, the emission from v$_2$=2 of HNC showed a different time profile.
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Author Institution: Department of Chemistry, Faculty of Science, Okayama University, Okayama 700-8530, Japan