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国家教育部博士点基金(20110211130002)

作品数:4 被引量:7H指数:1
相关作者:韩庆鑫唐晓亮石兆华刘伟生更多>>
相关机构:兰州大学更多>>
发文基金:国家教育部博士点基金国家自然科学基金中央高校基本科研业务费专项资金更多>>
相关领域:理学更多>>

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环配体Tb(Ⅲ)配合物及其作为H2S荧光探针研究
HS已被认为继NO和CO之后第三种在生命体系内发挥生理作用的内源性气体信号分子。鉴于它在生物和生命科学研究领域中重要的价值,目前已经发展了大量的有机染料类荧光探针去捕获和跟踪硫化氢分子[1-3]。然而有机染料类荧光探针往...
张凯明窦伟唐晓亮杨莉梓刘伟生
关键词:大环四胺铽配合物硫化氢
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Uranyl oxamate hydrates: hydrothermal synthesis, crystal structure, photophysical properties, and selective crystallization
2016年
Presented here are two isostructural uranyl coordination polymers [UOe(EDO)(H2O)]· H2O (1) and [UO2(BDO)(H2O)]-2H2O (2) (EDO2---ethylene-1,2-dioxamate; BDO2 =butylene-1,2-dioxamate) with identical stepwise zigzag chain structure and distinct interchain hydrogen bonding interaction, prepared from hydrothermal reaction of DEEDO or DEBDO (DEEDO- diethyl ethylene-1,2-dioxamate; DEBDO--diethyl butylene-l,2-dioxamate) with uranyl ions. The monomeric uranyl-based fluorescence emissions of compounds 1 and 2 are red-shifted by about 6 and 5 nm respectively, compared to that of uranyl nitrate hexahydrate. Compound 1 has stronger emission than compound 2, but both their emissions exhibit triple-exponential decay. The photophysics of uranyl oxalate trihydrate was also investigated for comparison. The selective crystallization of compound 1 in alkaline solution was applied to the sequestration of uranyl ions, showing a kinetic preference.
Yubo ShuWeisheng Liu
关键词:PHOTOPHYSICS
Complexation of uranyl ions by N-(sulfoethyl)-iminodiacetic acid:hydrothermal synthesis, luminescence, and uranyl sequestration
2015年
Reported here is a water-soluble ligand, N-(sulfoethyl)-iminodiacetic acid (H3SEIDA), used for the complexation of uranyl ions. A coordination compound composed of uranyl cation and N-(sulfonatoethyl)-ammoniodiacetate (SEADA2-) zwitterion was synthesized from an acidic aqueous solution. This compound features a 2D undulating fes (4.82) coordination layer that is stacked and linked by hydrogen-bonding interaction to form a 3D supramolecular framework with a 1D larger-cycle channel. Thermal analysis demonstrates the relatively weak bonding between uranyl cation and SEADA2 zwitterion. The monomeric uranyl-based fluorescence emission is red-shifted by about thermal synthesis of this uranyl compound was successfully 5 nm compared to that of uranyl nitrate hexahydrate. The hydro- applied to the sequestration of uranyl ions.
Yubo ShuZhenghua JuHongrui ZhangWeisheng Liu
关键词:LUMINESCENCE
荧光化学传感器的研究与应用被引量:7
2013年
通过对近几年荧光化学传感器在离子、分子的检测和识别、生物活性物质检测和细胞成像、近红外荧光分析和时间分辨检测、荧光化学传感器与磁共振成像以及纳米材料的结合等方面研究成果的归纳,分析和总结此类有机/稀土配合物荧光传感器的原理和制备方法,了解荧光传感器研究的前沿领域,为荧光化学传感器设计和应用提供新的思路.
韩庆鑫石兆华唐晓亮刘伟生
关键词:荧光传感器细胞成像
Visible and near-infrared luminescence of polycatenated cationic pyridinone lanthanide networks
2016年
A series of isomorphic lanthanide coordination polymers [Ln(Ⅲ)(MBP)2(NO3)2(Br)- 2C3H60] [Ln=Eu, Tb, Er, Yb, and Gd; MBP=N,N'-methylene-bis(pyridin-4-0ne)] featuring polycatenated sql cationic network and incorporated bromide counter ion were prepared. Their visible and near-infrared (NIR) luminescence properties were characterized by steady-state excitation and emission spectra, as well as luminescence lifetimes and quantum yields. The D2d dodecahedron coordination geometry causes visible light excitations and strongly monochromatic emissions. The external heavy-atom environment induces remarkable en- hancement on the NIR emissions. The sensitization processes are revealed by analyzing the electronic properties of MBP ligand.
Yubo ShuWeisheng Liu
关键词:LANTHANIDELUMINESCENCE
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