Cationic lanthanide complexes of 2-picolinic acid N-oxide

Boyd, Stephen A.; Kohrman, Robert E.; West, Douglas X.

doi:10.1016/0020-1650(76)80077-3

Cited by 31 publications

(6 citation statements)

References 12 publications

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“…1) have an oxygen atom as donor instead of nitrogen as in corresponding pyridine monocarboxylates. The transition metal ion and lanthanide ion complexes with pyridine https://doi.org/10.1016/j.jct.2018.02.006 0021-9614/Ó 2018 Elsevier Ltd. monocarboxylate-N-oxides (PCNOs) in both solid and solution state are extensively studied to explore their applications in luminescence, catalysis and many other fields [26][27][28][29][30][31][32][33][34][35][36][37][38][39] but only a few studies on actinide complexes with pyridine monocarboxylates are available in literature [40][41][42][43][44][45][46][47][48]. The transition metal ion and lanthanide ion complexes with pyridine https://doi.org/10.1016/j.jct.2018.02.006 0021-9614/Ó 2018 Elsevier Ltd. monocarboxylate-N-oxides (PCNOs) in both solid and solution state are extensively studied to explore their applications in luminescence, catalysis and many other fields [26][27][28][29][30][31][32][33][34][35][36][37][38][39] but only a few studies on actinide complexes with pyridine monocarboxylates are available in literature [40][41][42][43]…”

Section: Introductionmentioning

confidence: 99%

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Dumpala

Rawat

Boda

et al. 2018

The Journal of Chemical Thermodynamics

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a b s t r a c tThe feed wastes and waste water treatment plants are the major sources for the entry of N-oxides into the soils then to aquatic life. The complexation of actinides with potentially stable anthropogenic ligands facilitate the transportation and migration of the actinides from the source confinement. The present study describes the determination of thermodynamic parameters for the complexation of Th(IV) with the three isomeric pyridine monocarboxylates (PCNO) namely picolinic acid-N-oxide (PANO), nicotinic acid-N-oxide (NANO) and isonicotinic acid-N-oxide (IANO). The potentiometric and isothermal calorimetric titrations were carried out to determine the stability and enthalpy of the formations for all the Th(IV)-PCNO complexes. Th-PANO complexes are more stable than Th-NANO and Th-IANO complexes which can be attributed to chelate formation in the former complexes. Formation of all the Th-PCNO complexes are endothermic and are entropy driven. The geometries for all the predicted complexes are optimized the energies, bond distances and charges on individual atoms are obtained using TURBOMOLE software. The theoretical calculation corroborated the experimental determinations.

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Section: Introductionmentioning

confidence: 99%

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Dumpala

Rawat

Boda

et al. 2018

The Journal of Chemical Thermodynamics

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“…The extant literature includes studies that have examined the association of the picolinic N-oxide forming with bivalent transition metals ions [7] and trivalent lanthanide ions [8,9]. Furthermore, lanthanide complexes with picolinic acid forming a mixed-ligand compound, with 2,6-pyridine dicarboxylic acid [10] and glutaric acid [11] were investigated.…”

Section: Introductionmentioning

confidence: 99%

Thermal behavior, spectroscopic study and evolved gas analysis (EGA) during pyrolysis of picolinic acid, sodium picolinate and its light trivalent lanthanide complexes in solid state

Nascimento

Teixeira

Nunes

et al. 2016

Journal of Analytical and Applied Pyrolysis

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Synthesis, characterization, and thermal behavior of light trivalent lanthanide picolinate (La-Gd, except Pm) as well as the thermal behavior of picolinic acid and its sodium salt were investigated employing elemental analysis, complexometry, differential scanning calorimetry (DSC), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), infrared spectroscopy (FTIR), X-ray power diffractometry, and evolved gas analysis (EGA) for TG-DSC coupled to FTIR. All the synthesized compounds were obtained in the anhydrous state and the thermal decomposition in dynamic dry air atmosphere occured in a single step or two consecutive steps with formation of the respective oxides, CeO 2 , Pr 6 O 11 and Ln 2 O 3 (Ln = La, Nd to Gd). In dynamic dry nitrogen atmosphere the thermal decomposition occured in two or three consecutive steps and mass loss was observed up to 1000 • C. The EGA data allowed the identification of gaseous products evolved during pyrolysis and oxidative decomposition. The results of density functional theory (DFT) and FTIR also provided information on the ligand's denticity.

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“…The literature reports studies with picolinic N-oxide forming bivalent transition metals ions [12], trivalent lanthanide ions [13][14][15], rare earth picolinate complexes [16][17] and others lanthanide complexes [18]. Previous papers demonstrating the thermal behavior of lanthanides picolinates have been reported [14,17], however, no systematic study about the thermal behavior of the alkaline earth metal picolinates has been found.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)

Nascimento

Parkes

Ashton

et al. 2018

Journal of Analytical and Applied Pyrolysis

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Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.

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Cationic lanthanide complexes of 2-picolinic acid N-oxide

Cited by 31 publications

References 12 publications

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Thermal behavior, spectroscopic study and evolved gas analysis (EGA) during pyrolysis of picolinic acid, sodium picolinate and its light trivalent lanthanide complexes in solid state

Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)

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