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Two-Photon Ionization of Polyatomic Molecules in a Mass Spectrometer
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Two-photon IonizationChemistrySpectrochemical AnalysisNonlinear IonizationAnalytical ChemistryPhotophysical PropertyMolecular SpectroscopyBiophysicsAbstract Two-photon IonizationPhotochemistryBenzene MoleculesIon MobilityLaser PhotochemistryNatural SciencesSpectroscopyMass SpectrometryMultiphoton ProcessMedicineAtomic Fluorescence Spectroscopy
Abstract Two-photon ionization of benzene molecules in a mass spectrometer is performed with a tunable frequency-doubled dye laser. The nonlinear ionization is resonantly enhanced by real intermediate rovibronic levels in the S 1 state of the molecule. Our results show that stepwise multi-photon ionization is a very selective and versatile ionization source for a mass spectrometer.