Investigation of Coordinational Properties of Europium(III) Complexes with Picolinic Acid Using Eu(III) Excitation Spectroscopy

Park, Yeong Jae; Lee, Byoung Ho; Do, Youngkyu

doi:10.1006/jcis.1998.5888

Cited by 10 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A N,Ochelation has also been reported for Ln complexes with picolinic and dipicolinic acids. 7 Shifts of 19 cm -1 shown in the complexes spectra for the bands assigned to the υ(C-O) h stretch (at 1284 cm -1 for the hydroxyl group of the free ligand), are possibly due both to the O,Ochelation of one ligand, and to hydrogen bonding to the adjacent carboxylate group in the other two picOHligands bound through N,O-chelation. The infrared spectra of the lanthanide complexes show a very strong absorption in the region 3000-3500 cm -1 , assigned to the stretching vibrations of the O-H bonds in (a) the hydroxyl group of the N,O-chelated picOH -ligand (maximum at 3175 cm-1 ), (b) the coordinated water molecules (maximum at 3260 cm -1 ), and (c) the crystallization water molecules (maximum at 3380 cm -1 ).…”

Section: Resultsmentioning

confidence: 97%

Novel Lanthanide Luminescent Materials Based on Complexes of 3-Hydroxypicolinic Acid and Silica Nanoparticles

et al. 2002

View full text Add to dashboard Cite

New lanthanide complexes of 3-hydroxypicolinic acid (HpicOH) were prepared: [Ln(H 2 O)-(picOH) 2 (µ-HpicO)]‚3H 2 O (Ln ) Eu, Tb, Er). The complexes were characterized using photoluminescence, infrared, Raman, and 1 H NMR spectroscopy, and elemental analysis. The crystal structure of [Eu(H 2 O)(picOH) 2 (µ-HpicO)]‚3H 2 O 1 was determined by X-ray diffraction. Compound 1 crystallizes in a monoclinic system with space group P2 1 /c and cell parameters a ) 9.105(13) Å, b ) 18.796(25) Å, and c ) 13.531(17) Å, and ) 104.86(1) deg. The 3-hydroxypicolinate ligands coordinate through both N,O-or O,O-chelation to the lanthanide ions, as shown by X-ray and spectroscopic results. Photoluminescence measurements were performed for the Eu(III) and Tb(III) complexes; the Eu(III) complex was investigated in more detail. The Eu(III) compound is highly luminescent and acts as a photoactive center in nanocomposite materials whose host matrixes are silica nanoparticles.

show abstract

Section: Resultsmentioning

confidence: 97%

Novel Lanthanide Luminescent Materials Based on Complexes of 3-Hydroxypicolinic Acid and Silica Nanoparticles

et al. 2002

View full text Add to dashboard Cite

show abstract

“…Lanthanide Location. The sensitivity of the lanthanide luminescence lifetimes, − and that of the Eu luminescence lifetime in particular, − has been used to characterize the immediate environment of the lanthanide. Previous reports 5,13 exploited this sensitivity to show that the environment of lanthanide complexes with organic ligands in amorphous films is different from their environment in structured films; complexes in structured films had a lifetime that was 10% longer than that in amorphous films.…”

Section: Discussionmentioning

confidence: 99%

Multiply Doped Nanostructured Silicate Sol−Gel Thin Films: Spatial Segregation of Dopants, Energy Transfer, and Distance Measurements

2005

View full text Add to dashboard Cite

Physical and chemical strategies that place designed molecules in spatially separated regions of surfactant-templated mesostructured silicate thin films are used to prepare films containing rhodamine 6G (R6G), lanthanide complexes, and both simultaneously. Fluorescence and photoexcitation spectra of R6G in amorphous and structured thin films show that it is located inside the surfactant micelles of structured thin films. A silylated ligand that binds lanthanides condenses to form part of the silica framework and causes the lanthanide to localize in the silica. Luminescence and photoexcitation spectra show that energy transfer from the metal complex to R6G occurs in the films. R6G quenches Tb emission in a concentration-dependent manner. Energy transfer efficiency is calculated using the Tb luminescence lifetime, and this quantity is used to calculate the distance between Tb and R6G with the aid of Forster theory.

show abstract

“…Few research papers describe the synthesis of similar compounds. Some of them investigate the coordination properties of europium complex with picolinic acid [13]; the crystal structure, magnetic and photoluminescent properties of the neodymium and samarium compounds [14]; the magnetic and spectral properties of the La (III), Nd (III), Sm (III) and Eu (III) compounds [15]; and the preparation and characterization of some rare earth picolinate complex [16].…”

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

View full text Add to dashboard Cite

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.

show abstract

Investigation of Coordinational Properties of Europium(III) Complexes with Picolinic Acid Using Eu(III) Excitation Spectroscopy

Cited by 10 publications

References 10 publications

Novel Lanthanide Luminescent Materials Based on Complexes of 3-Hydroxypicolinic Acid and Silica Nanoparticles

Novel Lanthanide Luminescent Materials Based on Complexes of 3-Hydroxypicolinic Acid and Silica Nanoparticles

Multiply Doped Nanostructured Silicate Sol−Gel Thin Films: Spatial Segregation of Dopants, Energy Transfer, and Distance Measurements

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

Contact Info

Product

Resources

About