Ruiping Deng

Chinese Academy of Sciences

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Hongjie Zhang

Changchun Institute of Applied Chemistry

Shuyan Song

Changchun Institute of Applied Chemistry

Liang Zhou

Chinese Academy of Sciences

Jiangbo Yu

University of Washington

Zhiyong Guo

Fuzhou University

Wuping Liao

Changchun Institute of Applied Chemistry

Yanfeng Bi

Collaborative Innovation Center of Advanced Microstructures

Shengqun Su

Kyushu University

Jing Feng

Chinese Academy of Sciences

Feng Cao

Northeastern University

Cooperative Institutions

Chinese Academy of Sciences

171

Changchun Institute of Applied Chemistry

121

University of Science and Technology of China

University of Chinese Academy of Sciences

Jilin University

State Key Laboratory of Rare Earth Resources Utilization

State Council of the People's Republic of China

Tsinghua University

Central South University

Zhejiang University

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Suppression of Efficiency Roll-off in Co-doped Electroluminescent Devices Based on Europium Complex

Zhou Liang Ruiping Deng Hongjie Zhang

By co-doping alq(3)[tris(8-hydroxyquinoline) aluminum] and eu(tta)(3)phen (tta=thenoyltrifluoroacetone, phen =1,10-phenanthroline) into cbp (4,4' -n,n' dicarbazole -biphenyl), a series of electroluminescent (el) devices were fabricated and investigated. after optimizing the co-doping concentration of alq(3), significant suppression of el efficiency roll-off and almost doubled maximum brightness were realized without deteriorating the color purity. the presence of alq(3) molecules in light-emitting layer (eml) not only facilitates the injection and transport of electrons but also retards the transport of holes. alq(3) molecules function as ladders of hole transfer from cbp to eu(tta)(3)phen molecules as supported by the el spectroscopy results, thus facilitating the balance of holes and electrons on eu(tta)(3)phen molecules. therefore, two possible reasons are suggested to be responsible for the suppression of el efficiency roll-off: one is the broadening of recombination zone, the other is the improved balance of holes and electrons on eu(tta)(3)phen molecules.

Europium

Phenanthroline

Luminous efficacy

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Threep-tert-Butylthiacalix[4]arene-Supported Cobalt Compounds Obtained in One Pot Involving In Situ Formation of N₆H₂Ligand

Inorganic Chemistry (2010)

Yanfeng Bi Wuping Liao Guan‐Cheng Xu Ruiping Deng Meiyan Wang

Three p-tert-butylthiacalix[4]arene (H(4)TC4A)-supported Co(II) compounds, [Co(4)(TC4A)(N(3))(4)(N(6)H(2))(CH(3)OH)](CH(3)OH)(2) (1), [Co(8)(TC4A)(2)(N(3))(2)(N(6)H(2))(2)(CH(3)COO)(4)(CH(3)OH)(4)](OH)(2)(CH(3)OH)(4) (2), and [Co(10)(TC4A)(4)(N(3))(4)](CH(3)OH)(4) (3), have been solvothermally obtained in one pot and structurally characterized by single-crystal X-ray diffraction analyses, powder XRD, and IR spectroscopy. This work presents the first one-dimensional (1) cobalt cluster for the calixarene complexes and another two octanuclear (2) or decanuclear (3) cobalt clusters. In the structures of compounds 1 and 2, a novel N(6)H(2) ligand formed by the in situ (2 + 3) cycloaddition of two azides was observed. Density functional theory (DFT) calculations give the heat of formation (2N(3)(-) + 2H(+) --> N(6)H(2)) and decomposition energy (N(6)H(2) --> 3N(2) + H(2)) of 677.47 and 124.85 kcal/mol, respectively. Furthermore, an intergradation was determined at the B3LYP/6-311++g(d,p) level for the formation of the N(6)H(2) ligand. In addition, one TC4A ligand of a sandwich unit adopts a cone conformation, while the other adopts a pinched cone conformation in 3. The magnetic properties of these three compounds were influenced mainly by the orbital contributions of the distorted octahedral Co(II) ions.

10.1021/ic1005105

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Raisin-like rare earth doped gadolinium fluoride nanocrystals: microwave synthesis and magnetic and upconversion luminescent properties

CrystEngComm (2012)

Song Wang Shengqun Su Shuyan Song Ruiping Deng Hongjie Zhang

Bifunctional lanthanide doped 3D raisin-like GdF3 nanocrystals were synthesized by a microwave method. The influences of synthesis parameters on the final morphology were investigated and the morphology can be tuned to snow-like microcrystals and nanocrystals. The as-prepared samples possess properties of multicolor upconversion (UC) photoluminescence (PL) and paramagnetism. To understand the magnetic mechanism, temperature dependence of zero-field cooling (ZFC) and field cooling (FC) magnetization of the raisin-like GdF3 nanocrystals were studied.

Photon Upconversion

10.1039/c2ce25208b

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CCDC 779453: Experimental Crystal Structure Determination

Yanfeng Bi Guan‐Cheng Xu Wuping Liao Shangchao Du Xinwu Wang

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Precursor induced synthesis of hierarchical nanostructured ZnO

Nanotechnology (2006)

Shiyong Yu Cheng Wang Jiangbo Yu Weidong Shi Ruiping Deng

As-synthesized ZnO nanostructures with a bladed bundle-like architecture have been fabricated from a flower-like precursor ZnO·0.33ZnBr2·1.74H2O via a mechanism of dissolution–recrystallization. Experimental conditions, such as initial reactants and reaction time, are examined. The results show that no bladed bundle-like ZnO hierarchical nanostructures can be obtained by using the same molar amount of other zinc salts, such as ZnBr2, instead of the flower-like ZnO·0.33ZnBr2·1.74H2O precursor, and keeping other conditions unchanged. The products were characterized by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The ZnO nanostructures are mainly composed of nanowires with a diameter around 40–50 nm and length up to 1.5–2.5 µm. Meanwhile, ZnO nanoflakes with a thickness of about 4–5 nm attached to the surface of ZnO nanowires with a preferred radially aligned orientation. Furthermore, the photoluminescence (PL) measurements exhibited the unique white-light-emitting characteristic of hierarchical ZnO nanostructures. The emission spectra cover the whole visible region from 380 to 700 nm.

10.1088/0957-4484/17/14/041

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Five three/two-fold interpenetrating architectures from self-assembly of fluorene-2,7-dicarboxylic acid derivatives and d10 metals

CrystEngComm (2011)

Shengqun Su Chao Qin Zhiyong Guo Huadong Guo Shuyan Song

Five new three/two-fold interpenetrated coordination polymers, namely, [Cd(mfda)(L1)] (1), [Cd(efda)(L1)] (2), [Zn2(mfda)2(L2)]·DMF·H2O (3), [Zn2(efda)2(L2)]·(DMF)0.25, (4) and [Cd2(mfda)2(L2)2]·DMF·H2O (5) (H2mfda = 9,9-dimethylfluorene-2,7-dicarboxylic acid, H2efda = 9,9-diethylfluorene-2,7-dicarboxylic acid, L1 = Methylene bis(3,5-dimethylpyrazole) and L2 = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene), have been synthesized under solvent-thermal conditions with mixed ligands. Compounds 1 and 2 are isostructural and possess two-dimensional (6, 3) layered structures containing two kinds of rings. Three equivalent (6, 3) net interpenetrate in a parallel fashion to form an unprecedented mat-like 2D sheet. Compounds 3 and 4 are almost identical in structure and display threefold interpenetrating α–Po net structures. Compound 5 displays a twofold interpenetrated 3D 6-connected net with α–Po topology. The luminescent properties of these compounds have been studied in the solid state at room temperature.

Isostructural

Dicarboxylic acid

Methylene

10.1039/c0ce00662a

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Synthesis and Near Infrared Luminescence Properties of a Series of Lanthanide Complexes with POSS Modified Ligands

Molecules (2019)

Qingrui Zhang Xiuyun Yang Ruiping Deng Liang Zhou Yang Yu

A polyhedral oligomeric silsesquioxanes (POSS) modified 8-hydroxyquinoline derivative (denoted as Q-POSS) was synthesized and used as a ligand to coordinate with lanthanide ions to obtain a series of lanthanide complexes Ln(Q-POSS)₃ (Ln = Er3+, Yb3+, Nd3+). The as-prepared lanthanide complexes have been characterized by FT-IR, UV⁻Vis, and elemental analysis. All these complexes showed the characteristic near-infrared (NIR) luminescence originated from the corresponding lanthanide ions under excitation. Compared with the unmodified counterparts LnQ₃ (HQ = 8-hydroxyquinoline), the Ln(Q-POSS)₃ complexes showed obviously increased emission intensity, which was ascribed mainly to the steric-hindrance effects of the POSS moiety in the ligands. It is believed that the POSS group could suppress undesired excimer formation and intermolecular aggregation, thus decreasing the concentration quenching effect of the corresponding lanthanide complexes.

Moiety

Terbium

10.3390/molecules24071253

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Citations (12)

Semiconducting Polymer Dots Doped with Europium Complexes Showing Ultranarrow Emission and Long Luminescence Lifetime for Time‐Gated Cellular Imaging

Angewandte Chemie International Edition (2013)

Wei Sun Jiangbo Yu Ruiping Deng Yu Rong Bryant S. Fujimoto

Bright dots: Semiconducting polymer dots (Pdots) doped with europium complexes possess line-like fluorescence emission, high quantum yield, and long fluorescence lifetime. The Pdots successfully labeled receptors on cells. The long fluorescence lifetime of the Pdots was used to distinguish them from other red fluorescence emitting nanoparticles, and improve the signal-to-noise ratio for time-gated cellular imaging. PVK=poly(9-vinylcarbazole). As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

10.1002/anie.201304822

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Citations (95)

Metal-decorated Ni7S6 composite microflowers: Synthesis, characterization, and application

Materials Research Bulletin (2014)

Feng Cao Ruixia Liu Weiwei Lin Ruiping Deng Liang Zhou

Characterization

10.1016/j.materresbull.2014.01.026

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負荷重要な情報と偽造防止のための不可視インクとして適用された優れた熱および光安定性を有する高度に蛍光性の窒素ドープ炭素ドット【Powered by NICT】

Nanoscale (2017)

Yingbo Liu Liang Zhou Yanan Li Ruiping Deng Hongjie Zhang

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