Add time:10/01/2019         Source:sciencedirect.com

The electrospray mass spectra of the lanthanide (Ln)2,2,6,6-tetramethyl-3,5-heptanedione (thd) complexes Eu(thd)3, Gd(thd)3 and Yb(thd)3 were obtained from a methanol/water solution containing acetic acid. Protonated molecular ions Ln(thd)3H+ were obtained in each case. Extensive ligand exchange reactions in solution resulted in many mixed-ligand cationic species involving acetato ligands, H2O and H+. Tandem mass spectrometry of Ln(thd)3H+ gave the fragment ions Ln(thd)+ containing a lanthanide in the divalent state for Eu and Yb.

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