2006
DOI: 10.1002/ejic.200500438
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Synthesis and Characterization of Dinuclear Europium Complexes Showing Pure Red Electroluminescence

Abstract: Two dinuclear EuIII complexes have been synthesized by employing β-diketones and 2,2Ј-bipyrimidine (bpm) as sensitizing ligands for the Eu ion and a bridging ligand, respectively, and characterized by various means including single-crystal X-ray crystallography. The use of dibenzoylmethane (dbm) and trifluorothenoylacetone (tta) as β-diketones gave [Eu 2 (dbm) 6 (bpm)] (1) and [Eu 2 (tta) 6 (bpm)] (2). Both show strong intermolecular π-π interactions that may be responsible for their high melting points. The a… Show more

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Cited by 60 publications
(43 citation statements)
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“…Dinuclear lanthanide complexes provide an opportunity to study a rare class of compounds to detect f-f interactions [12]. 2,2 0 -Bipyrimidine (bpm) is a potentially bridging ligand, however there is a limited number of structurally characterized lanthanide complexes employing bpm as bridging ligand and most of them were reported during this study or during the preparation of this report [8][9][10][11].The goal of our work is to determine whether the coordinatively unsaturated Ln(fod) 3 chelates would coordinate on both sides of the bis-diimine ligand with large as well as small lanthanide metal ions to form a single dimetallic molecular species and to see the effect of such coordination on the properties of the metal ions. Therefore, this report describes the synthesis of a series of dinuclear lanthanide (Nd, Eu, Tb and Lu) complexes using 2,2 0 -bipyrimidine as bridging ligand and 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate as terminal ligands.…”
mentioning
confidence: 95%
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“…Dinuclear lanthanide complexes provide an opportunity to study a rare class of compounds to detect f-f interactions [12]. 2,2 0 -Bipyrimidine (bpm) is a potentially bridging ligand, however there is a limited number of structurally characterized lanthanide complexes employing bpm as bridging ligand and most of them were reported during this study or during the preparation of this report [8][9][10][11].The goal of our work is to determine whether the coordinatively unsaturated Ln(fod) 3 chelates would coordinate on both sides of the bis-diimine ligand with large as well as small lanthanide metal ions to form a single dimetallic molecular species and to see the effect of such coordination on the properties of the metal ions. Therefore, this report describes the synthesis of a series of dinuclear lanthanide (Nd, Eu, Tb and Lu) complexes using 2,2 0 -bipyrimidine as bridging ligand and 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate as terminal ligands.…”
mentioning
confidence: 95%
“…The lanthanide based materials find many applications such as in light-emitting devices [2], sensors [3], and liquid crystalline materials [4] and as luminescent probes [5]. Strategies for the design of stable trivalent lanthanide complexes relies on the use of chelating ligands [1] such as polyaminopolycarboxylates, cryptands, calixarenes, podands, helicates and among others the complexes with b-diketones [6] are most popular and intensively studied lanthanide complexes.Majority of lanthanide b-diketonate complexes studied are monometallic [6] and the reports on dinuclear lanthanide diketonate complexes is still scanty [7][8][9][10][11]. Dinuclear lanthanide complexes provide an opportunity to study a rare class of compounds to detect f-f interactions [12].…”
mentioning
confidence: 99%
“…Recently, more attention has been paid to OLEDs providing single-color emission (three primary colors: blue, green and red) and white emission [3,9,12,32,33,41,[72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91]. Our group has dedicated our efforts to the investigation of OLEDs based on conjugated materials, and tricolor, yellow as well as white emission were obtained from the devices.…”
Section: Tasch Et Al Reported An Efficient White Light-emittingmentioning
confidence: 99%
“…Over the past decade these bridging ligands have been utilized to form homodinuclear and heterodinuclear lanthanide complexes [1][2][3][4][5][6][7][8][9][10][11][12]. Of the numerous polyazine bridging ligands available two have received particular attention in forming lanthanide bridged complexes; 2,2 0 -bipyrimidine (bpm, I) and to a lesser extent 2,3-bis(2-pyridyl)pyrazine (dpp, II).…”
Section: Introductionmentioning
confidence: 99%
“…Molecular structure of Eu(tdh)3 dpp showing atomic numbering scheme, 50% thermal ellipsoid probability, H-atoms omitted for clarity. The C7 position is hidden behind F3.…”
mentioning
confidence: 99%