Synthesis and characterization of a series of N, N' ‐substituted urea derivatives by using electrospray ionization tandem mass spectrometry (ESI‐MS/MS): Differentiation of positional isomers

2021 ◽  
Author(s):  
Dilip Kumar Singh ◽  
Siddheshwar Kisan Chauthe ◽  
Prakash Anjanappa ◽  
Sumit Kumar ◽  
Ruba A. Arulraj ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Synthesis And Characterization ◽  
Tandem Mass ◽  
Positional Isomers ◽  
Urea Derivatives ◽  
Esi Ms ◽  
Ionization Tandem Mass Spectrometry

Characterization of Isomeric 1,2,4-Oxadiazolyl-N-Methylpyridinium Salts by Electrospray Ionization Tandem Mass Spectrometry

2007 ◽  
Vol 13 (3) ◽  
pp. 199-205 ◽  
Author(s):  
Giuseppe Avellone ◽  
David Bongiorno ◽  
Silvestre Buscemi ◽  
Leopoldo Ceraulo ◽  
Serena Indelicato ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Catalytic Properties ◽  
Tandem Mass ◽  
Green Solvents ◽  
Esi Ms ◽  
Mass Spectrometric Behavior ◽  
Ionization Tandem Mass Spectrometry

The mass spectrometric behavior of 1,2,4-oxadiazolyl- N-methylpyridinium salts has been investigated. These substances are of current interest as perspective ionic liquids, compounds used as green solvents for synthesis, and for their catalytic properties. The studies have been developed through electrospray ionization tandem mass spectrometry (ESI-MS/MS) experiments. The obtained results demonstrate a ready distinction between the two isomeric classes, 3- N-methylpyridinium- and 5- N-methylpyridinium-1,2,4-oxadiazoles, is possible through ESI-MS/MS experiments. A deeper investigation on the principal fragmentation pathways of characteristic ions has been also developed.

Direct sequencing of a disulfide-linked peptide with electrospray ionization tandem mass spectrometry

The Analyst ◽  
2015 ◽  
Vol 140 (8) ◽  
pp. 2623-2627 ◽  
Author(s):  
Gongyu Li ◽  
Jiying Pei ◽  
Yue Yin ◽  
Guangming Huang
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Corona Discharge ◽  
Electrospray Ionization ◽  
Disulfide Bonds ◽  
Direct Sequencing ◽  
Peptide Sequencing ◽  
Tandem Mass ◽  
Esi Ms ◽  
Ionization Tandem Mass Spectrometry

Enhanced corona discharge was employed for in-spray dissociation of disulfide bonds, facilitating disulfide-containing peptide sequencing with ESI-MS/MS.

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