title: Fragmentation reactions of labeled and untabeled Rhodamine B in a high-resolution Fourier transform ion cyclotron resonance mass spectrometer.
abstract: The fragmentation reactions of Rhodamine B have been investigated by the use of electrospray ionization mass spectra in a high mass resolving ion cyclotron resonance mass spectrometer. Using high resolution, it could be shown that the loss of 44 mass units from the molecular ion is due to propane; the measured masses were inconsistent with loss of carbon dioxide. These conclusions are supported using deuterium-labeled Rhodamine B. This sample again only shows the loss of fully-deuterated propane verifying the high-resolution data. These findings illustrate very clearly that the conclusions based solely on low resolution spectra were false. The general implication on fragmentations of aromatic acids is discussed.
authors.affiliation: Institute for Physical Chemistry, Christian-Albrechts University at Kiel, Kiel, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Clemen
authors.forename: Claus
authors.initials: C
authors.lastname: Gernert
authors.forename: Jonathan
authors.initials: J
authors.lastname: Peters
authors.forename: Jürgen
authors.initials: J
authors.lastname: Grotemeyer
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis; D017357:Cyclotrons; D003903:Deuterium; D004121:Dimethyl Sulfoxide; D005456:Fluorescent Dyes / Q000737:chemistry*; D007202:Indicators and Reagents; D011407:Propane / Q000737:chemistry; D012235:Rhodamines / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D005456:Fluorescent Dyes; D007202:Indicators and Reagents; D012235:Rhodamines; D002245:Carbon Dioxide; D003903:Deuterium; C029773:rhodamine B; D011407:Propane; D004121:Dimethyl Sulfoxide