Chapter 15
Mass Spectrometry Fragmentation Methods
질량 분석법: 장쇄 알칸 단편화
The molecular ions of linear alkanes prefer to fragment at the carbon-carbon bond away from the end of the chain since the cleavage of an inner bond ...
질량 분석법: 분지형 알칸 단편화
This lesson delves into the mass spectrometry of branched alkane fragmentation. Branched alkanes possess secondary or tertiary carbon atoms, which ...
질량 분석법: Cycloalkane Fragmentation
In mass spectrometry, cycloalkanes exhibit distinct fragmentation patterns due to the inherent stability of their molecular ions compared to linear or ...
질량 분석법: 알켄 단편화
Alkenes lose one electron from the unsaturated π bond upon ionization and form stable molecular ions. Further fragmentation of alkenes occurs through ...
질량 분석법: Cycloalkene 단편화
The molecular ions of cycloalkenes undergo fragmentation via a retro-Diels–Alder reaction.
The reaction proceeds via the cleavage of two ...
질량 분석법: 알카인 단편화
The fragmentation of alkynes preferentially occurs at the carbon–carbon bond between the α and β carbon of the alkyne bond to generate a ...
질량 분석법: 알코올 단편화
Alcohols (R-OH) ionize to lose one non-bonded electron from the oxygen atom, forming molecular ions. Due to their tendency to fragment rapidly, the ...
질량 분석법: 방향족 화합물 단편화
Upon ionization, aromatic compounds generate a molecular ion that is observed as a prominent peak in their mass spectra. For example, the molecular ion ...
질량 분석법: 아민 단편화
Amines can be identified using mass spectroscopy based on their characteristic fragmentation patterns. The molecular ions of amines undergo fragmentation ...
질량 분석법: 할로겐화 알킬 단편화
Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides ...
질량 분석법: 할로겐화 알킬 단편화
Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides ...
질량 분석법: 알데히드 및 케톤 단편화
In mass spectrometry, the fragmentation of aliphatic aldehydes and ketones generally occurs through three key mechanisms: α-cleavage, inductive ...
질량 분석법: 카르복실산, 에스테르 및 아미드 단편화
The fragmentation patterns observed for compounds such as carboxylic acids, esters, and amides in the mass spectra include ⍺-cleavage and McLafferty ...
화학 이온화(CI) 질량 분석기
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ...
전기 분무 이온화(ESI) 질량 분석기
Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional ...
매트릭스 보조 레이저 탈착 이온화(MALDI)
Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and ...
Copyright © 2025 MyJoVE Corporation. 판권 소유