1137900-54-9Relevant academic research and scientific papers
Novel lanthanide complexeswith di-2-pyridyl ketone-p-chloro- benzoylhydrazone : TTThermal investigation by simultaneous TG/DTG-DTA and IR spectroscopy
Lalia-Kantouri, Maria,Tzavellas,Paschalidis
, p. 937 - 942 (2009/01/31)
The reaction of a hydrated nitrate salt of lanthanide(III) (Ln=Er, Ho, Tb, Gd) or yttrium(III) (Y) with the ligand di-2-pyridyl ketone-p-Cl- benzoylhydrazone (DpkClBH), afforded air stable solid compounds. The new complexes characterized by means of elemental analysis (C, H, N, Ln), magnetic moment determinations and spectroscopic data (IR, MS). It is proposed that they are cationic of the general type: [Ln(DpkClBH)2(NO3) 2]NO3?nH2O, (n=2, 1, 1, 1, 1.5 for Ln=Y, Gd, Tb, Ho, Er, respectively). Their thermal decomposition was studied in nitrogen atmosphere, between 25-980°C, by using simultaneous TG/DTG-DTA technique. The IR spectroscopy used to determine the intermediates and the final products. The anhydrous nitrate complexes decomposed to the intermediates Ln(DpkClBH)(NO3)2, which upon further heating give a carbonaceous residue of Ln2O3 at 980°C. The mass spectra revealed the molecular ions of the complexes and their possible fragmentation pattern.
