Isomerization and Fragmentation of [b5]+ IONS AND [b5 H]+ Radical Cations in the Gas Phase

Simple item page
dc.contributor.advisorHopkinson, Alan
dc.contributor.advisorSiu, Michael
dc.creatorWu, Bai-Han Backen
dc.date.accessioned2018-03-01T13:42:53Z
dc.date.available2018-03-01T13:42:53Z
dc.date.copyright2017-03-24
dc.date.issued2018-03-01
dc.date.updated2018-03-01T13:42:53Z
dc.degree.disciplineChemistry
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractIn this thesis, we examined the CID spectra of the closed-shell [A4W-Me oxa + H]+ ions, which are completely identical, and indicates sequence scrambling. There are some unique fragmentation patterns from this set of ions that have been analyzed in details. The second part of this thesis is the study of the open-shell [A4W-Me oxa]+ radical cations. In this study, we noticed no sequence scrambling, which is a distinctive characteristic. This is attributed to the formation of a stable structure with a captodative radical at the N-terminus. We also studied the open-shell [A4Yoxa]+ and [A4Moxa]+ ions and summarized some similarities that are shared between the [A4Goxa]+, [A4Yoxa]+, and [A4Moxa]+ ions. All three systems exhibit some isomerization before dissociation; but CID spectra of different sequences are non-identical, with different relative abundances. Loss of CO2 is frequently the most dominant peak in all three systems.
dc.identifier.urihttp://hdl.handle.net/10315/34241
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectPhysical chemistry
dc.subject.keywordsCollision-induced dissociation
dc.subject.keywordsSequence scrambling
dc.subject.keywordsMacrocyclization
dc.subject.keywordsEffect of α-methyl on dissociation pathways
dc.subject.keywordsDensity Functional calculations
dc.subject.keywordsCID
dc.subject.keywordsRadical cation
dc.subject.keywordsα-methyltryptophan
dc.subject.keywords-methyltryptophan
dc.titleIsomerization and Fragmentation of [b5]+ IONS AND [b5 H]+ Radical Cations in the Gas Phase
dc.typeElectronic Thesis or Dissertation

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Wu_Baihan_Backen_2017_Masters.pdf
Size:
6.23 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
license.txt
Size:
1.83 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
YorkU_ETDlicense.txt
Size:
3.38 KB
Format:
Plain Text
Description:
Download

Collections

Chemistry

All items in the YorkSpace institutional repository are protected by copyright, with all rights reserved except where explicitly noted.