Electrospray ionization mass spectrometry of lanthanide(III) complexes with 2,6-diacetylpyridine bis-4-N-ethylthiosemicarbazone

The interactions between 2,6-diacetylpyridine bis-4-N-ethylthiosemicarbazone (1) and ten lanthanide triflates have been studied by means of electrospray ionization mass spectrometry. The aim of this work is to gain a better insight into the coordination trends of thiosemicarbazones towards lanthanides. Thiosemicarbazone ligand 1 forms with lanthanides stable complexes, which can be observed in the ESI spectra.