249928-02-7Relevant articles and documents
Synthesis, characterization, and spectroscopic properties of binuclear copper(I) complexes with NN-NN, NNOH, NCN, and phosphine ligands
Gan, Xin,Yao, Zu-Fu,Zhang, Jun-Feng,Li, Zheng,Fu, Wen-Fu
, p. 2800 - 2811 (2010)
Three new binuclear copper(I) complexes, [Cu2(paa)(dppm)2](BF4)2 (1), [Cu2(NNO)(dppm)2]BF4 (2), and [Cu 2(NCN)(dppm)2](BF4)2 (3), were prepared with bridging or chelating pyridine-2-carbaldehyde azine (paa or NN-NN), 2, 4-dimethyl-7-hydroxyl-1, 8-naphthyridine (NNOH), 1-methyl-3, 5-di(2-pyridyl)benzene (NCN), and bis(diphenylphosphino)methane (dppm) ligands and their structures were determined by X-ray crystal analysis. The structural analysis revealed that coppers in the complexes are three-and four-coordinate and NN-NN adopts N, N chelating and bridging coordination modes while NNOH, NCN and dppm afforded only a bridging model. The two metal centers approach closely with copper(I)-copper(I) distances of 2.7811-3.420 A. Intense solid-state emission centered at 490 nm was observed for 1.
Facile synthesis and characterization of phosphorescent Pt(N ^C^N)X complexes
Wang, Zixing,Turner, Eric,Mahoney, Vanessa,Madakuni, Sijesh,Groy, Thomas,Li, Jian
experimental part, p. 11276 - 11286 (2011/02/27)
In order to investigate the ground state and excited state properties of Pt(N^C^N)X, we have prepared a series of Pt complexes, where N^C^N aromatic chelates are derivatives of m-di(2-pyridinyl)benzene (dpb) and X are monoanionic and monodentate ancillary ligands including halide and phenoxide. Facile synthesis of platinum m-di(2-pyridinyl)benzene chloride and its derivatives, using controlled microwave heating, was reported. This method not only shortened the reaction time but also improved the reaction yield for most of the Pt complexes. Two Pt(N^C^N)X complexes have been structurally characterized by X-ray crystallography. The change of functional group does not affect the structure of the core Pt(N^C^N)Cl fragment. Both molecules pack as head-to-tail dimers, each molecule of the dimer related to the other by a center of inversion. The electrochemical studies of all Pt complexes demonstrate that the oxidation process occurs on the metal-phenyl fragment and the reduction process is associated with the electron accepting groups like pyridinyl groups and their derivatives. The maximum emission wavelength of the Pt(N^C^N)X complexes ranges between 471 and 610 nm, crossing the spectrum of visible light. Most of the Pt complexes are strongly luminescent (Φ = 0.32-0.63) and have short luminescence lifetimes (τ = 4-7 μs) at room temperature. The lowest excited state of the Pt(N ^C^N)X complexes is identified as a dominant ligand-centered 3π-π* state with some 1MLCT/3MLCT character, which appears to have a larger 1MLCT component than their bidentate and tridentate analogs. This results in a high radiative decay rate and high quantum yield for Pt(dpb)Cl and its analogs. However, the excited state properties of the Pt(N^C ^N)X complexes are strongly dependent on the nature of the electron-accepting groups and substituents to the metal-phenyl fragment. A rational design will be needed to tune the emission energies of the Pt(N ^C^N)X complexes over a wide range while maintaining their high luminescent efficiency.
Organometallic complex, luminescent solid, organic EL element and organic EL display
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, (2008/06/13)
An object of the invention is to provide an organic EL element which uses an organometallic complex emitting light by phosphorescence and which represents excellent luminous efficiency, etc; or the like. The organic EL element of the invention includes the organometallic complex, where the organometallic complex includes a metal atom, and a tridentate ligand, where the tridentate ligand binds to the metal atom tridentately via two nitrogen atoms and a carbon atom, and the carbon atom is located between the two nitrogen atoms, and where the tridentate ligand has two azomethine bonds (—C═N—), and each nitrogen atom in the azomethine bonds coordinates to the metal atom. Preferably, in one aspect, the organometallic complex includes a monodentate ligand which binds to the metal atom monodentately, and in another aspect, the metal atom is Pt.
