Synthesis, structural characterisation and thermal decomposition studies of some 2,4′-bipyridyl complexes with cobalt(II), nickel(II) and copper(II)

Radwanska-Doczekalska, J.; Czakis-Sulikowska, D.; Markiewicz, M.

doi:10.1007/bf01997191

Cited by 15 publications

(2 citation statements)

References 6 publications

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“…This work is a continuation of our previous studies on synthesis, properties, and thermal decomposition of metal complexes with bipyridine isomers and carboxylates [1][2][3][4][5][6][7]. Lanthanide compounds are curious for many research workers in last years because of their variety applications [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 75%

“…The dehydration process of complex Sm(4-bpy) 1.5 (CCl 3 COO) 3 ÁH 2 O is connected with partial decomposition of trichloroacetate ligands (333-418 K), which are demonstrated by endothermic peak on DTA curve (378 K). Probably Sm(4-bpy) 1 Mass spectrometry A coupled TG-MS system has been used to study volatile species and fragments evolved during the dynamic thermal decomposition of Ln(4-bpy) 1.5 (CCl 3 COO) 3 ÁH 2 O (where Ln(III) = Pr, Sm) in air atmosphere. MS data of Pr(III) and Sm(III) complexes are very similar.…”

Section: Thermal Decompositionmentioning

confidence: 99%

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Thermal behavior and other properties of Pr(III), Sm(III), Eu(III), Gd(III), Tb(III) complexes with 4,4′-bipyridine and trichloroacetates

Czylkowska

Czakis-Sulikowska

Kaczmarek

et al. 2011

J Therm Anal Calorim

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A novel mixed-ligand complexes with empirical formulae: Ln(4-bpy) 1.5 (CCl 3 COO) 3 ÁnH 2 O (where Ln(III) = Pr, Sm, Eu, Gd, Tb; n = 1 for Pr, Sm, Eu and n = 3 for Gd, Tb; 4-bpy = 4,4 0-bipyridine) were prepared and characterized by chemical, elemental analysis and IR spectroscopy. Conductivity studies (in methanol, dimethylformamide and dimethylsulfoxide) were also described. All complexes are crystalline. The way of metal-ligand coordination was discussed. The thermal properties of complexes in the solid state were studied under non-isothermal conditions in air atmosphere. During heating the complexes decompose via intermediate products to the oxides: Pr 6 O 11 , Ln 2 O 3 (for Sm, Eu, Gd) and Tb 4 O 7. TG-MS system was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis of Pr(III) and Sm(III) compounds in air.

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Section: Introductionmentioning

confidence: 75%

Section: Thermal Decompositionmentioning

confidence: 99%

Thermal behavior and other properties of Pr(III), Sm(III), Eu(III), Gd(III), Tb(III) complexes with 4,4′-bipyridine and trichloroacetates

Czylkowska

Czakis-Sulikowska

Kaczmarek

et al. 2011

J Therm Anal Calorim

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Analytical and thermal investigations of new solid Y(III) and La(III) complexes

Czylkowska

Raducka

Mierczyński

et al. 2018

J Therm Anal Calorim

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New compounds with formulae Y(2,4 0-bpy) 1.5 Cl 3 Á8H 2 O (I), Y(2,4 0-bpy) 0.5 Br 3 Á8H 2 O (II), La(2,4 0-bpy)Cl 3 Á5H 2 O (III) and La(2,4 0-bpy) 1.5 Br 3 Á5H 2 O (IV) were prepared and characterized by chemical and elemental analysis, IR spectroscopy and powder X-ray diffraction. The thermal properties of compounds in the solid state were studied using TG-DTA techniques under dry air atmosphere. The thermal behavior of investigated compounds was studied in the temperature range 298-1273 K. They are stable up to 323 K. The complexes decompose in several stages, accompanied by endo-and exothermic effects. In all cases, the first step of pyrolysis is partial or total dehydration. When the temperature rises, deamination takes place. The solid final products of decomposition are Y 2 O 3 and La 2 O 3 , respectively. Additionally, for all complexes mass spectrometry was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis under dry air atmosphere. Keywords Y(III) and La(III) complexes Á 2,4 0-Bipyridine Á TG-DTA Á Mass spectra & Agnieszka Czylkowska

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