Crystal Structure and Spectroscopic Studies of a Dimeric Europium( III) similar to- Diketonate Complex Containing [ 3-( 2-Pyridyl)-1-pyrazolyl] acetate
authors Coelho, AC; Gomes, AC; Fernandes, JA; Paz, FAA; Braga, SS; Rino, L; Pereira, L; Pillinger, M; Goncalves, IS
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Europium; Dinuclear complexes; N; O ligands; Luminescence; Structure elucidation
keywords 3-(2-PYRIDYL)-1-PYRAZOLYL ACETIC-ACID; LANTHANIDE COMPLEXES; LUMINESCENT PROPERTIES; BRIDGING LIGAND; BETA-DIKETONE; 2,2'-BIPYRIMIDINE; ELECTROLUMINESCENCE; COORDINATION; EPOXIDATION; DIVERSITY
abstract The homodinuclear europium(III) -diketonate complex [Eu-2(bta)(4)(pypzCH(2)COO)(2)] (1) {bta = 1-benzoyl-3,3,3-trifluoroacetonate, pypzCH(2)COO = [3-(2-pyridyl)-1-pyrazolyl]acetate} was isolated after recrystallization of the crude product obtained from the reaction of [Eu(bta)(3)(H2O)(2)] with one equivalent of the ligand phenyl[3-(2-pyridyl)-1-pyrazolyl]acetate (pypzCH(2)CO(2)C(6)H(5)). A single-crystal X-ray diffraction study confirmed that during the recrystallization the hydrolysis of the ester group in pypzCH(2)CO(2)C(6)H(5) took place to give pypzCH(2)COO(-), which culminated in the crystallization of dinuclear complex 1 in which each Eu3+ ion is coordinated to two O,O-chelated bta(-) groups and one N,N-chelated pyrazolylpyridine ligand, and the two metal centers are linked by tridentate chelating-bridging ((2)-(2),(1)) carboxylate groups. The luminescence properties of 1 were investigated by steady-state photoluminescence (PL), PL excitation, and time-resolved PL.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2014
volume 2014
issue 8
beginning page 1284
ending page 1288
digital object identifier (doi) 10.1002/ejic.201301520
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000333445600004

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