Coordination modes of pyridine-carboxylic acid derivatives in samarium (III) complexes
authors Soares-Santos, PCR; Paz, FAA; Ferreira, RAS; Klinowski, J; Carlos, LD; Trindade, T; Nogueira, HIS
nationality International
journal POLYHEDRON
author keywords lanthanide complexes; N,O ligands; coordination modes; crystal structures; luminescence
keywords CRYSTAL-STRUCTURE; LUMINESCENCE; CHEMISTRY; HEXAHYDRATE; LIGANDS; SM(III)
abstract Samarium (III) complexes of picolinic acid (Hpic), 3-hydroxypicolinic acid (HpicOH) and 2-hydroxynicotinic acid (H(2)nicO) were prepared and characterised. The crystal structures of the samarium complexes K-2[Sm-2(PiC)(6)(mu-pic)(2)]center dot 7.5H(2)O (1), [Sm(picOH)(2-)(mu-HpicO)(H2O)]center dot 3H(2)O (2) and [Sm(HniCO)(2)(mu-HnicO)(H2O)center dot 5H(2)O (3) were determined by single-crystal X-ray diffraction studies. The coordination modes of the pyridine-carboxylic acids to Sm3+ centres have been investigated. These complexes showed room-temperature photoluminescence. (c) 2006 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0277-5387
year published 2006
volume 25
issue 12
beginning page 2471
ending page 2482
digital object identifier (doi) 10.1016/j.poly.2006.03.002
web of science category Chemistry, Inorganic & Nuclear; Crystallography
subject category Chemistry; Crystallography
unique article identifier WOS:000239866800016
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