A comparative study of the optical and electroluminescent properties of Eu-III complexes with TTA and 2-(2 '-pyridyl)azoles: The crystal structure of [Eu(TTA)3(PBO)]

Two Eu-III mixed-ligand complexes, namely [Eu(TTA)(3)(PBO)] and [Eu(TTA)(3)(PBT)] [TTA = 1,1,1-trifluoro-3-(2-thenoyl)acetonato, PBO = 2-(2'-pyridyl)-1,3-benzoxazole, and PBT = 2(2'-pyridyl)-1,3-benzothiazole], have been synthesized. [Eu(TTA)(3)(PBO)] has been structurally characterized by single-crystal X-ray diffraction analysis. The complex crystallizes in the monoclinic space group C2/c. The lattice parameters are a = 41.346(4), b = 10.0538(8), c = 20.3793(16) angstrom, beta = 110.922(2)degrees, Z = 8. The Eu-III ion is eight-coordinate, with three bidentate TTA(-) anions and one bidentate N,O-chelated PBO molecule. A comparative study by UV and emission spectroscopy was carried out and electroluminescent properties of the related complexes [Eu(TTA)(3)(PBO)] and [Eu-(TTA)(3)(PBT)] are reported as well. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000241010300024&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Chemistry, Inorganic & NuclearSCI(E)19ARTICLE183731-373