Sustained Off-Resonance Irradiation Collision-Induced Dissociation of Linear, Substituted and Cyclic Polyesters Using a 9.4 T Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

2003 ◽  
Vol 9 (2) ◽  
pp. 117-128 ◽  
Author(s):  
Liam A. McDonnell ◽  
Peter J. Derrick ◽  
Brian B. Powell ◽  
Philip Double
Keyword(s):  
Fourier Transform ◽  
Mass Spectrometer ◽  
Cyclotron Resonance ◽  
Collision Induced Dissociation ◽  
Ion Cyclotron Resonance ◽  
Experimental Conditions ◽  
Charge Remote Fragmentation ◽  
Fragment Ions ◽  
Ion Cyclotron ◽  
Single Fragment

The fragment ions obtained from sustained off-resonance irradiation collision-induced dissociation of linear polyesters, substituted polyesters and cyclic polyesters have been characterized using a 9.4 T Fourier transform ion cyclotron resonance mass spectrometer. Charge-induced and charge-remote fragmentation channels, together with the participation of other nucleophilic groups, are proposed for the substituted polyesters. The linear polyesters were found to fragment at equivalent positions along the polymer chain whereas, under the experimental conditions employed, the cyclic polyester produced a single fragment.

Subsequent radical fragmentation reactions of N,N-diethylamino-substituted azobenzene derivatives in a Fourier transform ion cyclotron resonance mass spectrometer using collision-induced dissociation and photodissociation

2017 ◽  
Vol 23 (6) ◽  
pp. 359-368 ◽  
Author(s):  
Martin Clemen ◽  
Jürgen Grotemeyer
Keyword(s):  
Fourier Transform ◽  
Mass Spectrometer ◽  
Cyclotron Resonance ◽  
Radical Reaction ◽  
Collision Induced Dissociation ◽  
Ion Cyclotron Resonance ◽  
Ion Cyclotron ◽  
Radical Fragmentation ◽  
Fragmentation Reactions ◽  
Azobenzene Derivatives

The fragmentation behavior of N, N-diethylamino-substituted azobenzene derivatives is investigated by high-resolving mass spectrometry using a Fourier transform ion cyclotron resonance mass spectrometer. Former investigations by photodissociation as well as collision-induced dissociation experiments used to induce a loss of C3H8 from the diethylamino group. The position of the additional proton in [M + H]+ ions is important due to the sequences of radical fragmentation reactions. Two possibilities arise. First, a charge is located at the azo group leading to a methyl radical loss. The second possibility is that the charge has been located on the aniline nitrogen of the molecule resulting in an ethyl radical loss. Only o-ethyl red has shown the overall loss of C3H8 in a two-step radical reaction mechanism. Nevertheless, p-ethyl red and ethyl yellow have shown systematic fragmentation reactions as well. Loss of C3H8 has not been likely regarding both these molecules. All experimental findings together with quantum chemical calculations as well as kinetic calculations support the proposed fragmentation mechanisms of the three azo dyes.

5.6 tesla Fourier transform ion cyclotron resonance mass spectrometer for analysis of volatile complex mixtures

1998 ◽  
Vol 69 (6) ◽  
pp. 2278-2284 ◽  
Author(s):  
Ryan P. Rodgers ◽  
Forest M. White ◽  
Daniel G. McIntosh ◽  
Alan G. Marshall
Keyword(s):  
Fourier Transform ◽  
Mass Spectrometer ◽  
Cyclotron Resonance ◽  
Complex Mixtures ◽  
Ion Cyclotron Resonance ◽  
Ion Cyclotron
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