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Doubly‐charged positive ions following loss of oxygen dianion under conditions of field desorption mass spectrometry
Author(s) -
Ligon Woodfin V.,
Dorn Steven B.
Publication year - 1989
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210240611
Subject(s) - ion , desorption , chemistry , oxygen , mass spectrum , mass spectrometry , cluster (spacecraft) , homogeneous , molecule , analytical chemistry (journal) , photochemistry , inorganic chemistry , chromatography , organic chemistry , adsorption , physics , thermodynamics , computer science , programming language
Abstract A number of cyclic aromatic anhydrides have been found to exhibit doubly‐charged positive ions in their field desorption mass spectrum which correspond to the formal loss of oxygen dianion followed by clustering with a neutral molecule. Admixtures of two anhydrides, which both exhibit this phenomenon, produce heterogeneous doubly‐charged cluster ions. Admixture with anhydrides which do not show the effect, produces only homogeneous clusters at reduced intensity.