Alvarez-Valtierra, Leonardo
(2008)
MOLECULAR EXCITED STATE DYNAMICS VIA HIGH RESOLUTION ELECTRONIC SPECTROSCOPY IN THE GAS PHASE.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Dynamical processes can be studied using the high resolution spectroscopy technique. Often, the connection between dynamics and spectroscopy is the uncertainty principle ΔEΔt ≈ ħ; in other cases, dynamics makes its appearance via extra rovibronic peaks, tunneling splittings, anomalous line intensities, and anomalous line broadenings. Among others, these particular spectral details are related to crucial dynamical information occurring in the molecules upon excitation. Through this work, the electronic origin and some vibronic transitions have been investigated where such phenomena are manifested. Consequently, dynamical analyses are performed to explain the apparent unique characteristics present in their experimental spectra.The molecules studied here include 2-methoxynaphthalene, S-(+)- and R-(-)- naproxen, acenaphthene, acenaphthene-argon complex, 9,10-dihydrophenanthrene, 2-methylanisole, 3-methylanisole, 2-methylpyrimidine, 5-methylpyrimidine, dibenzothiophene, 2,5-diphenylfuran, and 2,5-diphenyl-1,3,4-oxadiazole. The results of the present work lead to interesting insights into the vibrational inversion motion, the hindered methyl group torsional motion, and some dynamical relaxation processes of selected molecules studied. In the case of naproxen, the results obtained to date shed light on the origins of optical activity.
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| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
18 January 2008 |
| Date Type: |
Completion |
| Defense Date: |
28 September 2007 |
| Approval Date: |
18 January 2008 |
| Submission Date: |
4 December 2007 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Dietrich School of Arts and Sciences > Chemistry |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
dibenzothiophene; dihydrophenanthrene; electronic transition; excited state; intersystem crossing; methylanisole; methylpyrimidine; naproxen; rotationally resolved; methyl internal rotation; tunneling splitting; acenaphthene |
| Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-12042007-002035/, etd-12042007-002035 |
| Date Deposited: |
10 Nov 2011 20:07 |
| Last Modified: |
15 Nov 2016 13:53 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/10017 |
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