Formation and study of single metal ion–phospholipid complexes in biphasic electrospray ionization mass spectrometry

Single metal ion-phospholipid complexes are observed in biphasic electrospray ionization mass spectrometry (BESI-MS) using a dual-channel microsprayer. Such a microsprayer makes it possible to put into contact two immiscible liquids within the Taylor cone. Thus, L-alpha-dipalmitoyl phosphatidylcholine (DPPC) dissolved in 1,2-dichloroethane (DCE) reacts with aqueous metal cations (M = Na+, K+, Ca2+, Cu2+, La3+) yielding the formation of [M-DPPCn](z+) complexes. The number of phospholipid molecules ranges from 1 to 4 for monovalent ions, to 8 for divalent and to more than 10 for trivalent ions respectively. The large number of ligands observed involves the formation of solvent free single ion-phospholipid complexes.


Published in:
Metallomics, 2, 400-416
Year:
2010
Publisher:
Royal Society of Chemistry
ISSN:
1756-5901
Keywords:
Laboratories:




 Record created 2010-05-27, last modified 2018-09-13

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