Search results for "Ionspray"

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Guest-to-host proton transfer in melatonin-beta-cyclodextrin inclusion complex by ionspray, fast atom bombardment and tandem mass spectrometry.

2001

Ionspray (IS) and fast atom bombardment (FAB) positive ionization mass spectrometry (MS) of 1:1 β-cyclodextrin (β-CD)-melatonin (MLT) host-guest complex allowed the detection of gaseous protonated 1:1 β-CD-MLT. Tandem MS collision-induced dissociation (CID) of such protonated 1:1 β-CD-MLT species showed the proton (charge) to be retained to a significant extent by the host and by its cage fragmentation products, in spite of the higher proton affinity of MLT with respect to that of β-CD. This requires an endothermic guest-to-host proton transfer to occur within the gaseous association. Collisional activation could be accounted for by the promotion of such an endothermic process; however…

Spectrometry Mass Electrospray IonizationFast atom bombardmentTandem mass spectrometryAnalytical chemistryBeta-CyclodextrinsProtonationSpectrometry Mass Fast Atom BombardmentPhotochemistryTandem mass spectrometryDissociation (chemistry)Inclusion compoundchemistry.chemical_compoundFragmentation (mass spectrometry)CyclodextrinSpectroscopyβ-cyclodextrin host-guest complexeMelatoninCyclodextrinsbeta-Cyclodextrinsbeta-CyclodextrinFast atom bombardmentElectrosprayEndothermic guest-to-host proton transferAlgorithmchemistryIonsprayProton affinityAlgorithmsJournal of mass spectrometry : JMS
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