Studies of the complexation behavior of tetramorpholinylo-PNP-lariat ether with Ag(I), Ca(II), Cd(II), Cu(II) and Pb(II) using Electrospray Ionization Mass Spectrometry

摘要

In this publication the cationic metal complexes of tetramorpholinylo-PNP-lariat ether have beenstudied using electrospray ionization mass spectrometry (ESI-MS). The tandem mass spectra (MS/MS) ofthese complexes have also been tested to evaluate the stability of the different types of thecomplexes formed. As occurred, all selected metal cations form the complexes with 1 : 1 stoichiometrywith the investigated ligand. Only silver ions create a ‘‘sandwich’’ type complex. Furthermore, thedivalent cations form complexes with the nitrate anion adduct. In the case of Ca(II), Cd(II) and Pb(II) wealso observed another type of the species with an additional water molecule attached to the parentcomplex.