Multiply protonated betaine clusters are stable in the gas phase
Linda Feketeova, Richard AJ O'Hair
CHEMICAL COMMUNICATIONS | ROYAL SOC CHEMISTRY | Published : 2008
Multiply protonated clusters of betaine are formed via electrospray ionisation and fragment via competitive betaine neutral loss and charge separation; theoretical calculations suggest the [M(n)+2H](2+) ions consist of a [M(2)+2H](2+) core based on the hydrogen bonded carboxylic acid dimer.
We acknowledge financial support from ARC (CoE program for RAJO and IF for LF) and funding from the ARC and the VICS for the purchase of the LTQ-FT mass spectrometer. Support of the VICS High Performance Computing Facility is gratefully acknowledged. We thank Prof. Evan Bieske and Dr Tom Waters for useful discussions.