Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase

Bibliographic Details
Main Author: Doddipatla, Srinivas
Publication Date: 2018
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: https://hdl.handle.net/10316/96288
Summary: Documentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeiros
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
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spelling Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas PhasePhotodissociation DynamicsHalogenated Heterocyclic MoleculesGas PhaseDocumentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeirosThe process of photodissociation is the breaking of one or several bonds in a molecule through the absorption of photon. The area of photodissociation dynamics concerns with the detailed mechanisms of photodissociation process investigated on molecular level. One of the principal goal of these kind of studies is to obtain a clear picture of the various dynamic processes in the excited electronic state as the molecule leaves the Franck-Condon region, traverses the ‘transition state’ (i.e., the barrier, if there is any), and finally reaches the asymptotic channel(s), where the fragments are formed. Photodissociation experiments are generally performed state selectively i.e. molecule being prepared in well defined quantum state. Therefore, results from these kinds of experiments are readily compared with the theoretical calculations, resulting in significantly enhanced understanding of the elementary chemical processes [1]. Photodissociation dynamics of various molecules of interest are studied in molecular beam (MB) generated by supersonic expansion through a pulsed valve after seeding it in Helium gas. The isolated molecules in the MB are photodissociated using ultraviolet (UV) laser. One of the resultant photofragments, in the present case mainly atomic species, is probed using Resonance Enhanced Multiphoton Ionization Time-of- Flight Mass Spectrometry (REMPI-TOF-MS). The combination of supersonic molecular beam, REMPI and TOF mass spectrometer has potential of detecting the chemical species state and mass selectively In this thesis, the photodissociation dynamics of halogenated heterocyclic molecules has been studied. It is well known that the photodissociation of halogen containing molecules in the UV range generates halogen atoms which are detrimental for the ozone layer in the stratosphere. Also, it is fundamentally interesting to study the halogenated heterocyclic molecules because of their rich excited state dynamics due to their radiationless transitions, vibronic and spin-orbit coupling. Further, effect of fluorine atom substitution on dynamics has also been investigated. In this context, five and six member heterocyclic molecules have been chosen with one to three hetero atoms in the ring.2018-07doctoral thesisinfo:eu-repo/semantics/publishedVersionhttps://hdl.handle.net/10316/96288https://hdl.handle.net/10316/96288engDoddipatla, Srinivasinfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2022-05-25T03:00:42Zoai:estudogeral.uc.pt:10316/96288Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T05:44:38.618605Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
title Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
spellingShingle Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
Doddipatla, Srinivas
Photodissociation Dynamics
Halogenated Heterocyclic Molecules
Gas Phase
title_short Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
title_full Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
title_fullStr Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
title_full_unstemmed Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
title_sort Photodissociation Dynamics of Halogenated Heterocyclic Molecules in Gas Phase
author Doddipatla, Srinivas
author_facet Doddipatla, Srinivas
author_role author
dc.contributor.author.fl_str_mv Doddipatla, Srinivas
dc.subject.por.fl_str_mv Photodissociation Dynamics
Halogenated Heterocyclic Molecules
Gas Phase
topic Photodissociation Dynamics
Halogenated Heterocyclic Molecules
Gas Phase
description Documentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeiros
publishDate 2018
dc.date.none.fl_str_mv 2018-07
dc.type.driver.fl_str_mv doctoral thesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/10316/96288
https://hdl.handle.net/10316/96288
url https://hdl.handle.net/10316/96288
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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