OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/49611

Show full item record

Files Size Format View
abstract.gif 85.38Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
OSUS2011.pptx 8.990Mb Microsoft PowerPoint 2007 View/Open
Slide1.GIF 15.40Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide2.GIF 13.51Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide3.GIF 56.73Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide4.GIF 32.91Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide5.GIF 52.69Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide6.GIF 42.18Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide7.GIF 49.19Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide8.GIF 27.06Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide9.GIF 29.28Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide10.GIF 23.40Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide11.GIF 21.60Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide12.GIF 26.56Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide13.GIF 38.06Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide14.GIF 32.55Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide15.GIF 35.59Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Slide16.GIF 31.11Kb GIF image Thumbnail of VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES

Title: VIBRATIONAL COUPLING PATHWAYS IN THE CH STRETCH REGION OF CH$_3$OH AND CH$_3$OD AS REVEALED BY IR AND FTMW-IR SPECTROSCOPIES
Creators: Twagirayezu, Sylvestre; Wang, Xiaoliang; Perry, David S.; Neill, Justin L.; Muckle, Matt T.; Pate, Brooks H.; Xu, Li-Hong
Issue Date: 2011
Abstract: Infrared spectra of jet-cooled CH$_3$OD and CH$_3$OH in the CH stretch region are observed by coherence-converted population transfer Fourier transform microwave-infrared (CCPT-FTMW-IR) spectroscopy (E torsional species only) and by slit-jet single resonance spectroscopy (both A and E torsional species, CH$_3$OH only). Previously, we reported$ \textbf{2010}, 114, 6818}$ the analysis of $\nu_3$ symmetric CH stretch region (2750$-$2900 cm$^{-1}$), and the present work extends the analysis to higher frequency (2900$-$3020 cm$^{-1}$). The overall observed spectra contain 17 interacting vibrational bands for CH$_3$OD and 28 for CH$_3$OH. The signs and magnitudes of the torsional tunneling splittings are deduced for three CH fundamentals ($\nu_3$, $\nu_9$, $\nu_2$) of both molecules and are compared to a model calculation and to ab initio theory. The number and distribution of observed vibrational bands indicate that the CH stretch bright states couple first to doorway states that are binary combinations of bending modes. In the parts of the spectrum where doorway states are present, the observed density of coupled states is comparable to the total density of vibrational states in the molecule, but where there are no doorway states, only the CH stretch fundamentals are observed. A time-dependent interpretation of the present FTMW-IR spectra indicates a fast ($\sim$ 200 fs) initial decay of the bright state followed by second, slower redistribution ($\sim$ 1$-$3 ps). The qualitative agreement of the present data with the time-dependent experiments of Iwaki and Dlott $ \textbf{2000}, 104, 9101}$ provides further support for the similarity of the fastest vibrational relaxation processes in the liquid and gas phases.
URI: http://hdl.handle.net/1811/49611
Other Identifiers: 2011-WI-09
Bookmark and Share