RESUMO
Solid complexes of lanthanide nitrates with an novel unsymmetrical tripodal ligand, butyl-N,N-bis[((2'-benzylaminofomyl)phenoxyl)ethyl]-amine (L) have been synthesized and characterized by elemental analysis, infrared spectra and molar conductivity measurements. At the same time, the luminescent properties of the Sm(III), Eu(III), Tb(III) and Dy(III) nitrate complexes in solid state were also investigated. Under the excitation of UV light, these complexes exhibited characteristic emission of central metal ions.
Assuntos
Disprósio/química , Európio/química , Lantânio/química , Substâncias Luminescentes/química , Samário/química , Térbio/química , Ligantes , Substâncias Luminescentes/síntese química , Estrutura MolecularRESUMO
In the structure of the title compound, C(12)H(11)N(3)O(3)·H(2)O, the dihedral angle formed by the benzene and isoxazole rings is 2.03â (8)°. The mol-ecular conformation is stabilized by an intra-molecular O-Hâ¯N hydrogen bond. In the crystal structure, mol-ecules are linked into a three-dimesional network by inter-molecular N-Hâ¯O, O-Hâ¯N and O-Hâ¯O hydrogen bonds, and by π-π stacking inter-actions involving adjacent benzene and isoxazole rings [centroid-centroid separation = 3.663â (2)â Å].
RESUMO
Solid complexes of lanthanide nitrates with an novel multipodal ligand, 1,2,4,5-tetramethyl-3,6-bis{N,N-bis[((2'-furfurylaminoformyl)phenoxyl)ethyl]-aminomethyl}-benzene (L) have been synthesized and characterized by elemental analysis, infrared spectra and molar conductivity measurements. At the same time, the luminescent properties of the Sm(III), Eu(III), Tb(III) and Dy(III) nitrate complexes in solid state were investigated. Under the excitation of UV light, these complexes exhibited characteristic emission of central metal ions. The lowest triplet state energy level of the ligand indicates that the triplet state energy level (T1) of the ligand matches better the resonance level of Tb(III) than other lanthanide ions.
Assuntos
Derivados de Benzeno/química , Complexos de Coordenação/química , Elementos da Série dos Lantanídeos/química , Substâncias Luminescentes/química , Nitratos/química , Derivados de Benzeno/síntese química , Complexos de Coordenação/síntese química , Elementos da Série dos Lantanídeos/síntese química , Ligantes , Luminescência , Substâncias Luminescentes/síntese química , Nitratos/síntese química , Espectrofotometria InfravermelhoRESUMO
Solid complexes of lanthanide nitrates, picrates and perchlorates with a novel multipodal ligand, 1,2,4,5-tetramethyl-3,6-bis{N,N-bis[((2'-benzylaminoformyl)phenoxyl)ethyl]-aminomethyl}-benzene (L) have been synthesized and characterized by elemental analysis, infrared spectra and molar conductivity measurements. At the same time, the luminescent properties of the Eu and Tb complexes in solid state were investigated. Under the excitation of UV light, these complexes exhibited characteristic emission of central metal ions. The lowest triplet state energy level T(1) of this ligand matches better to the lowest resonance energy level of Tb(III) than to Eu(III) ion. The influence of the counter anion on the luminescent intensity was also discussed.