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Red Electroluminescence and Photoluminescence from Novel Binuclear Europium Complex with squaric acid Ligand

Chinese Chemical Letters 2001年第10期12卷 921-924页

作者： Wei Guo ZHU Xiao Qiang WEI Mei Xiang ZHU Zhi Yun LU Bo LIANG Ming Gui XIE De Qiang ZHANG Yong QIU College of Chemistry Xiangtan UniversityXiangtan411105 Department of Chemistry Sichuan UniversityChendu610064 Department of Chemistry Tsinghua University

A novel binuclear europium P-diketone complex with squaric acid ligand was synthesized for the first time. Its structure was elucidated by IR, UV, and Elemental Analysis. Red light emitting diode (LED) was fabricated by using the novel europium complex as an emitting layer, tris(8-quinolinolate) aluminum (III) (Alq(3)) as an electron-transporting layer, N, N'-diphenyl-N, N'-(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD) as a hole-transporting layer. A cell structure of indium-tin-oxide/TPD/Eu-complex/Alq(3)/Mg: Ag was employed. Red electroluminescence was observed at room temperature with dc bias voltage of 2 V in this cell. 2 Red emission peaks at about 613 nm with maximum luminance of over 106 cd/m(2). Compared with the EL luminance from those europium complexes reported before, one from the Eu-complex is best in the same cells.

关键词： europium chelate squaric acid electroluminescence (EL) photoluminescence (PL)

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Geometric and Electronic Structure of squaric acid from DFT Calculation

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Journal of Materials Science & Technology 2004年第2期20卷 206-208页

作者： Xuyan XUE, Chunlei WANG and Weilie ZHONGSchool of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China Shandong Univ Sch Phys & Microelect State Key Lab Crystal Mat Jinan 250100 Peoples R China

The crystal and electronic structure of antiferroelectric squaric acid is studied using density functional theory method, and the exchange correlation effects are treated by the generalized approximation. In order to understand the ferroelectricity of H2SQ in the molecular plane and the antiferroelectricity in whole crystal, the density of states, charge density distribution and band structure are calculated. The result showed that O2p and C2p play important roles in the interactions between layers. The hybridizations of 02s-Hls and 02p-Hls are responsible for the tendency to ferroelectricity within each layer.

关键词： Antiferroelectricity Electronic structure squaric acid

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The Synthesis and Characterisation of Polyaniline Catalysed and Doped by squaric acid

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Wuhan University Journal of Natural Sciences 1999年第1期4卷 105-107页

作者： Zhan Caimao, 1) Zhen Jianjun, 2) Su Haisong, 1) Yang Xi, 1) Qi Jingui 1) Department of Chemistry, Wuhan University, Wuhan,430072,China 2) Radio TV University of Xiaogan, Hubei,432200,China

Aniline was polymerized in dilute aqueous squaric acid and the polyaniline(PAn) was doped with 10 -1 10 -3 mol/L of squaric acid. The corresponding electrical conductivity of the PAn is 10 -1 10 -2 S·cm -1 . The solubility of the doped PAn has been improved in common polar organic solvents . The FTIR and UV-Vis spectra show that the PAn has the structure of both quinone and imine .

关键词： polyanilime squaric acid catalyse dope

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