Synthesis, characterization and thermal behaviour of heavy trivalent lanthanide malonates

Abstract

Solid-state Ln-L compounds, where Ln stands for heavy trivalent lanthanides (Tb-Lu) and L is malonate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy, TG-FTIR system, elemental analysis and complexometry were used to characterize and to study the thermal behaviour of these compounds. The dehydration of the compounds begins at 303 K and the anhydrous compounds are stable up to 548 K. The results also provided information concerning the ligand's denticity, thermal behaviour and identification of some gaseous products evolved during the thermal decomposition of these compounds.

Corrosion resistance of poly p-phenylenediamine conducting polymer coated 316L SS bipolar plates for Proton Exchange Membrane Fuel Cells

“…The origin of this peak is attributed to electronic transitions from the valence band to the conduction band [29,30]. In the spectrum of sodium malonate, the strong band around 1580 cm −1 and the medium band around 1350 cm −1 are due to the anti-symmetrical and symmetrical frequencies of the carboxylate groups respectively [31].…”

Poly(m‐phenylenediamine)‐coated 316L SS: A promising material for bipolar plates in PEMFC environment

“…The origin of this peak is attributed to electronic transitions from the valence band to the conduction band . In the spectrum of sodium malonate, the strong band around 1,580/cmand the medium band around 1,350/cm are due to the antisymmetrical and symmetrical frequencies of the carboxylate groups respectively …”

“…[26,34] In the spectrum of sodium malonate, the strong band around 1,580/cmand the medium band around 1,350/cm are due to the antisymmetrical and symmetrical frequencies of the carboxylate groups respectively. [35] 3.3 | Open-circuit potential measurement…”