Reference : Mass Spectrometric Study of the Ionized C60: (Gamma-Cyclodextrin)2 Inclusion Complex by ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/13022
Mass Spectrometric Study of the Ionized C60: (Gamma-Cyclodextrin)2 Inclusion Complex by Collision Induced Dissociation
English
Greisch, Jean-François mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie physique]
Kyritsoglou, S. [> > > >]
Leyh, Bernard mailto [Université de Liège - ULg > Département de chimie (sciences) > Laboratoire de dynamique moléculaire >]
De Pauw, Edwin mailto [Université de Liège - ULg > > Chimie physique, spectrométrie de masse >]
Feb-2008
Journal of Mass Spectrometry [=JMS]
43
2
242-50
Yes (verified by ORBi)
International
1076-5174
[en] Internal energy ; Spectrométrie de masse
[en] The water soluble inclusion complex [C(60):(gamma-cyclodextrin)(2)] has been characterized using electrospray tandem mass spectrometry and collision induced dissociation. [C(60):(gamma-cyclodextrin)(2)] ions were detected in the gas phase as doubly deprotonated, doubly protonated and doubly sodiated ions. The absence of monocharged complex ions following electronebulization is a likely consequence of the dimeric nature and structural symmetry of the inclusion complex. The collision induced dissociation of positive ions led exclusively to the observation of the protonated and sodiated cyclodextrin ions as well as their fragments. In negative ion mode the closed shell anion C(60)H(-) was the dominant fragment detected at low collision energies whereas at higher collision energies the signal corresponding to deprotonated cyclodextrin units becomes significant. Since C(60) (2-) has been reported to have a nonnegligible basicity compared to C(60) and C(60) (-), it is likely that the proton transfer involved in the formation of the C(60)H(-) anion occurs following transfer of the two electrons from the deprotonated gamma-cyclodextrins to the fullerene. Finally, the charge state of the inclusion complex ions is also shown to affect the interaction strengths between its subunits. The relative stabilities of the three ionic species studied in gas phase following electronebulization are as follows: [C(60):(gamma-cyclodextrin)(2) + 2H](2+) < [C(60):(gamma-cyclodextrin)(2)- 2H](2-) < [C(60):(gamma-cyclodextrin)(2) + 2Na](2+).
Laboratoire de spectrométrie de masse ; Giga-Systems Biology and Chemical Biology
Walloon region
NOMADE
Researchers
http://hdl.handle.net/2268/13022
10.1002/jms.1296
http://www3.interscience.wiley.com/journal/116330202/abstract?CRETRY=1&SRETRY=0

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