Synthesis, characterization and thermal studies on solid state 3-methoxybenzoate of lighter trivalent lanthanides

Dametto, P. R.; Siqueira, A. B.; Carvalho, Cláudio Teodoro de; Ionashiro, Massao

doi:10.1590/s0100-46702007000200003

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…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

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The physico-chemical properties of the new 3d-4f heteronuclear complexes with general formula LnCu3(C11H8N2O4Br)3·13H2O (where Ln = Pr, Eu, Gd, Tb, Er, Yb and H3(C11H8N2O4Br) – 5-bromosalicylideneglycylglycine) were studied. The compounds were characterized by elemental, spectral and thermal analyses and magnetic measurements. The formation of Schiff base is evidenced by a strong band at ca. 1646–1650 cm–1 attributable to C=N stretching mode. The presence of water molecules is confirmed by broad absorptions with maximum at 3360 – 3368 cm-1. The Cu(II)–Ln(III) complexes are stable up to ca. 318 K. During dehydration process the water molecules are lost probably in two stages. The magnetic susceptibility data for these complexes change with temperature according to the Curie-Weiss law.

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Section: Resultsmentioning

confidence: 99%

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

et al. 2009

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“…These observations indicate that the ligand is deprotonated (as ADC) within the MOF structures. The band at 1562 cm −1 in the MOF spectra is attributed to of metal-oxygen bonds [36].…”

Section: Ftir Analysismentioning

confidence: 99%

Anthracene-Based Lanthanide Metal-Organic Frameworks: Synthesis, Structure, Photoluminescence, and Radioluminescence Properties

et al. 2018

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Four anthracene-based lanthanide metal-organic framework structures (MOFs) were synthesized from the combination of the lanthanide ions, Eu 3+ , Tb 3+ , Er 3+ , and Tm 3+ , with 9,10-anthracenedicarboxylic acid (H 2 ADC) in dimethylformamide (DMF) under hydrothermal conditions. The 3-D networks crystalize in the triclinic system with P-1 space group with the following compositions: (i) {{[Ln 2 (ADC) 3 (DMF) 4 ·DMF]} n , Ln = Eu (1) and Tb (2)} and (ii) {{[Ln 2 (ADC) 3 (DMF) 2 (OH 2 ) 2 ·2DMF·H 2 O]} n , Ln = Er (3) and Tm (4)}. The metal centers exist in various coordination environments; nine coordinate in (i), while seven and eight coordinate in (ii). The deprotonated ligand, ADC, assumes multiple coordination modes, with its carboxylate functional groups severely twisted away from the plane of the anthracene moiety. The structures show ligand-based photoluminescence, which appears to be significantly quenched when compared with that of the parent H 2 ADC solid powder. Structure 2 is the least quenched and showed an average photoluminescence lifetime from bi-exponential decay of 0.3 ns. On exposure to ionizing radiation, the structures show radioluminescence spectral features that are consistent with the isolation of the ligand units in its 3-D network. The spectral features vary among the 3-D networks and appear to suggest that the latter undergo significant changes in their molecular and/or electronic structure in the presence of the ionizing radiation.

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Synthesis, characterization and thermal behaviour of solid-state compounds of europium(III) and gadolinium(III) 3-methoxybenzoate

Dametto

Ambrozini

Siqueira

et al. 2009

J Therm Anal Calorim

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Synthesis, characterization and thermal studies on solid state 3-methoxybenzoate of lighter trivalent lanthanides

Cited by 6 publications

References 21 publications

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

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

Anthracene-Based Lanthanide Metal-Organic Frameworks: Synthesis, Structure, Photoluminescence, and Radioluminescence Properties

Synthesis, characterization and thermal behaviour of solid-state compounds of europium(III) and gadolinium(III) 3-methoxybenzoate

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