Synthesis, characterization and thermal behaviour on solid pyruvates of light trivalent lanthanides

Siqueira, A. B.; Carvalho, Cláudio Teodoro de; Rodrigues, Eduardo A.; Ionashiro, E. Y.; Bannach, Gilbert; Ionashiro, Massao

doi:10.1590/s0100-46702007000400007

Cited by 10 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a continuation of our previous study [13], since our papers involving solid compounds with trivalent lanthanides and several organic ligands, the profiles of TG and DTA curves, as well as the thermal behaviour have shown similar characteristics among the light and heavy trivalent lanthanide compounds [14][15][16][17][18][19]. The present paper deals with the preparation of solid-state compounds of heavy trivalent lanthanides (i.e.…”

Section: Introductionmentioning

confidence: 62%

“…In this study, the employed quantum chemical approach to determine the molecular structures was Becke three parameter hybrid theory [16] using the Lee-Yang-Par (LYP) correlation functional [17], and the basis sets used for calculations were: 4s for H ( 2 S) [18] [19]. The diffuse functions for the yttrium atom ( 2 D) were calculated according to the procedure described in Ref.…”

Section: Computational Strategymentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Gigante¹,

Gomes²,

Lima³

et al. 2014

Braz. J. Therm. Anal.

View full text Add to dashboard Cite

Characterization, thermal stability and thermal decomposition of heavy trivalent lanthanide mandelates Ln(C 6 H 5 CH(OH)CO 2 ) 3 ·2H 2 O (Ln = Tb to Lu and Y) were investigated employing simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), experimental and theoretical infrared spectroscopy, X-ray diffractometry, complexometry and TG-DSC coupled to FTIR. The dehydration of the compounds occurs in a single step and the thermal decomposition of the anhydrous ones occurs in two, three, four or five consecutive steps, with formation of the respective oxides Tb 4 O 7 and Ln 2 O 3 (Ln = Dy to Lu and Y) as final residues. The results also provided information concerning the composition, thermal behavior and gaseous products evolved during the thermal decomposition of these compounds. The theoretical and experimental spectroscopic data suggest the possible modes of coordination of the ligand with the heavy lanthanides.

show abstract

Section: Introductionmentioning

confidence: 62%

Section: Computational Strategymentioning

confidence: 99%

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Gigante¹,

Gomes²,

Lima³

et al. 2014

Braz. J. Therm. Anal.

View full text Add to dashboard Cite

show abstract

“…In the spectra of complexes, additional bands of medium intensity occur in the 556-560 cm -1 region and may be assigned to the metal-oxygen vibration. Therefore, the metal ions in these complexes may be bridged by ligands coordinating through the oxygen atoms [18][19][20][21][22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and magnetic studies of copper(II)-lanthanide(III) 5-bromosalicylideneglycylglycine

et al. 2009

View full text Add to dashboard Cite

IntroductionMagnetism of molecular complexes simultaneously comprising 3d and 4f metal ions has been the subject of investigation in the last few years. These compounds are important not only in preparative coordination chemistry but also to understand the mechanism of the magnetic interaction between 3d and 4f centres, which are potential magnetic materials. The magnetic interactions between rareearth and d block metal ions have been found to be weak, as one can expect given the relatively low covalency of the lanthanide-to-ligand bonds, but their effects are by no means negligible, producing profound modifications on the nature of the magnetic materials, depending on the nature of the lanthanides and 3d metal ions involved. In particular the copper(II)-gadolinium(III) couple has been extensively studied both from a structural as well as from magnetic point of view, in a number of binuclear Cu(II)-Gd(III) and polynuclear system with Cu 2 Gd, Cu 4 Gd, Cu 4 Gd 2 or (CuGd) n cores, bridged by phenoxo or multidentate ligand with hetero donating groups. The most frequently used ligands are polydentate Schiff base. The nature of the magnetic interaction between Cu(II) and Gd(III) ions within polynuclear species is, in most cases, ferromagnetic, as in dinuclear complexes. From a magnetic point of view, well isolated dinuclear complexes have a great advantage for they only contain the Cu-Gd interaction parameter. On the contrary, in complexes of higher nuclearity, as in trinulcear Cu 2 Gd complexes for example, we have to take into account the desired Cu-Gd interaction but also a possible Cu-Cu interaction (antiferromagnetic, ferromagnetic or equal to zero) [1][2][3][4][5][6][7][8][9][10][11][12][13][14].As a continuation of our earlier work here we reported the magnetic properties of original

show abstract

“…In aqueous solutions the formation of some metal ions complexes with pyruvic acid in ratio of metal: ligand 1:1 and 1:2 have been established by the spectroscopic method [1][2][3]; the stability constants and thermodynamic functions of complexes formation of lanthanides with pyruvic acid: ∆G, ∆H, ∆S, have also been determined [4]. In the solid state, preparation of europium pyruvate [5], as well as the preparation and properties of lanthanides and yttrium pyruvates have also been described [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and thermal behaviour on solid pyruvates of some bivalent metal ions

Siqueira

Carvalho

Ionashiro³

et al. 2009

Eclet. Quím.

Self Cite

View full text Add to dashboard Cite

Solid state M-L compounds, were M stands for bivalent Mn, Fe, Co, Ni, Cu, Zn and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermogravimetry (TG/ DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry, infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, ligand denticity, and thermal decomposition of the isolated compounds.

show abstract

Synthesis, characterization and thermal behaviour on solid pyruvates of light trivalent lanthanides

Cited by 10 publications

References 8 publications

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Synthesis and magnetic studies of copper(II)-lanthanide(III) 5-bromosalicylideneglycylglycine

Synthesis, characterization and thermal behaviour on solid pyruvates of some bivalent metal ions

Contact Info

Product

Resources

About