Author: Ryan Tyler BisePublisher:
ISBN:
Category :
Languages : en
Pages : 404
Book Description
Photoisomerization and Photodissociation Dynamics of Reactive Free Radicals
Author: Ryan Tyler BisePhotodissociation Dynamics of Free-radicals
Author: Eric Michael RossCoincidence and Noncoincidence Studies of the Photodissociation Dynamics of Free Radicals
Author: Ann Elise FaulhaberPhotodissociation Dynamics of Free Radicals Using High-n Rydberg Atom Time-of-flight Technique
Author: Yu SongPublisher:
ISBN: 9781124563251
Category : Molecular dynamics
Languages : en
Pages : 253
Book Description
The first chapter discusses the photodissociation dynamics as well as its experimental methodology. The experimental setup of the HRTOF technique is explained in detail.
UV-photodissociation Dynamics of Small Molecules and Free Radicals Studied by High-n Rydberg H-Atom Time of Flight Spectroscopy
Author: Gabriel Alejandro AmaralPublisher:
ISBN:
Category : Molecular dynamics
Languages : en
Pages : 406
Book Description
Photodissociation Dynamics of the NCO Free Radical
Author: Stephen Gómez DíazPhotodissociation Spectroscopy and Dynamics of Free Radicals, Clusters, and Ions
Author: Hyeon ChoiPhotoisomerization and Photodissociation Dynamics of Reactive Free Radicals
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 198
Book Description
The photofragmentation pathways of chemically reactive free radicals have been examined using the technique of fast beam photofragment translational spectroscopy. Measurements of the photodissociation cross-sections, product branching ratios, product state energy distributions, and angular distributions provide insight into the excited state potential energy surfaces and nonadiabatic processes involved in the dissociation mechanisms. Photodissociation spectroscopy and dynamics of the predissociative {tilde A}2A1 and {tilde B}2A2 states of CH3S have been investigated. At all photon energies, CH3 + S(3P{sub j}), was the main reaction channel. The translational energy distributions reveal resolved structure corresponding to vibrational excitation of the CH3 umbrella mode and the S(3P{sub j}) fine-structure distribution from which the nature of the coupled repulsive surfaces is inferred. Dissociation rates are deduced from the photofragment angular distributions, which depend intimately on the degree of vibrational excitation in the C-S stretch. Nitrogen combustion radicals, NCN, CNN and HNCN have also been studied. For all three radicals, the elimination of molecular nitrogen is the primary reaction channel. Excitation to linear excited triplet and singlet electronic states of the NCN radical generates resolved vibrational structure of the N2 photofragment. The relatively low fragment rotational excitation suggests dissociation via a symmetric C{sub 2V} transition state. Resolved vibrational structure of the N2 photofragment is also observed in the photodissociation of the HNCN radical. The fragment vibrational and rotational distributions broaden with increased excitation energy. Simple dissociation models suggest that the HNCN radical isomerizes to a cyclic intermediate (c-HCNN) which then dissociates via a tight cyclic transition state. In contrast to the radicals mentioned above, resolved vibrational structure was not observed for the ICNN radical due to extensive fragment rotational excitation, suggesting that intermediate bent states are strongly coupled along the dissociation pathway. The measurements performed in this Thesis have additionally refined the heats of formation and bond dissociation energies of these radicals and have unambiguously confirmed and added to the known electronic spectroscopy.
Photodissociation Dynamics and Spectroscopy of Free Radical Combustion Intermediates
Author: David Lewis OsbornUV Photodissociation Dynamics of Polyatomic Free Radicals Using High-n Rydberg Atom Time of Flight Spectroscopy
Author: Michael Scott LucasPublisher:
ISBN: 9781339729367
Category : Atomic absorption spectroscopy
Languages : en
Pages : 222
Book Description
Chapter 7 will briefly discuss the results of a related system, 3-cyclohexenyl radical, and general conclusions.