刘伟生
稀土配位化学
个性化签名
- 姓名:刘伟生
- 目前身份:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
有机化学
- 研究兴趣:稀土配位化学
1982年1月毕业于山东大学化学系,1988年、1996年在兰州大学化学系获硕士、博士学位。1996年、1998年分别在香港大学化学系作为博士后和访问学者,2001年9月赴美国“麻省理工学院”做高访一年。现为兰州大学化学化工学院院长、教授、博士生导师,首批“新世纪百千万人才工程”国家级人选,甘肃省高等学校跨世纪学科带头人。兼任甘肃省化学会副理事长,中国化学会无机化学学科委员会委员,“无机化学学报”编委。主要从事稀土配位化学的科研及教学工作,在稀土新型发光材料、超分子功能配合物等研究领域取得了重要科研成果。曾主持和参加国家“攀登计划” 项目、国家自然科学基金重大和面上项目等多项研究课题。在“J. Am. Chem. Soc.”, “Chem.- Eur. J.”“Inorg. Chem.”,“Org. Lett.”,“Dalton Trans”,“中国科学(B辑)”等国内外著名学术刊物上发表论文150余篇,部分成果获甘肃省科技进步一等奖、二等奖。
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716
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成果数
10
【期刊论文】Decontamination of radioactive cesium from natural NaCI by amide-type open-chain crown ethers
刘伟生, Y.H. Wen, , S.Lahiri, *, Z.Qin, X.L.Wu, W.S.Liu**
Journal of Radiandlytical and Nuclear Chemistry, Vol. 253, No.2 (2002) 263-265,-0001,():
-1年11月30日
An atternpt has been made to develop a radiochemical methodology for the decontamination of a trace amount of radioactive cesium from a bulk amount of natural NaCI by liquid-liqnid extraction (LLX). Open chain others, of amide type, namely, N,N,N',N'-teraphenyl-1-3.6-dioxaoctanediamide (TDD), N,N,N',N'-tetrapheny 1-3,6,9-trioxaundecanediamide and N,N'-dinaphthyl-N,N'-dipheny1-3,6-dioxaoctanediamide (DDD) have been chosen for this purpose. The separation factor between Cs and Na is the highest when 110-4M TDD dissolved in nitrobenzene is used as extractant and 0.4M picric acid at pH 5.0 is used as aqueous phase. About 601% Cs is extracted in this condition in a sing le run.
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刘伟生, Wenwu Qin, Weisheng Liu*, Minyu Tan
Analytica Chimica Acta 468(2002)287-292,-0001,():
-1年11月30日
A new salicylic-based open-chain crown ether ligand, 1,10-bis(2'-carboxylphenyl)-1,4,7,10-tetraoxadecane (BCPTD) was synthesized. Solutions of its complex with Tb3+ can emit the intrinsic fluorescence of Tb3+. The fluorescence intensity of the complex in KCl solution was enhanced by the addition of silver (I), leading to a new fluorescence enhancement phenomenon. The spectrofluorimetric determination of traces of silver (I) based on the above phenomenon was carried out. The excitation and emission wavelengths are 298 and 545nm, respectively. Under optimal conditions, the differenial value of fluorescence intensity in the absence and presence of Ag+ was proportional to the concentration of silver (I) in the range 0.5-20μgml−1. The method was applied to the determination of silver (I) in a standard ore sample. The analytical performance is investigated in detail by using common aromatic carboxylic acids or synthetic analogues of BCPTD as ligands to replace BCPTD. It was found that Tb-aromatic acid complexes did not result in fluorescence enhancement of Tb3+ in AgCl collosol. The phenomenon was only observed in Tb (III) with BCPTD or its open-chain crown ether analogues solutions. In addition, the enhancement of the fluorescence intensity of terbium (III) in these complexes depends on the extent of formation of the AgCl collosol.
Fluorescence enhancement, Terbium, 1,, 10-bis(, 2', -Carboxylphenyl), -1,, 4,, 7,, 10-tetraoxadecane, Silver chloride collosol, Silver (, I), determination
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【期刊论文】Synthesis and Characterization of Europium Complex Nanowire
刘伟生, Xiaofeng Li, Weisheng Liu, *, Wenhua Wang, and Xinyong Guoy†
,-0001,():
-1年11月30日
A new compound of benzyl 2-{2-[ethyl(phenyl)amino]-2-oxoethoxyg-1,1-bis{2-[ethyl(phenyl)amino]-2-oxoethoxymethylgethylcarbamate (L) was synthesized. The Eu (III) complex nanowires were fabricated by a template method and characterized by elemental analysis, IR spectrum and TEM. The longer luminescence lifetime was found for the Eu (III) complex nanowire in comparison with that of Eu (III) complex powder which is prepared by deposition reaction in solvent.
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刘伟生, Wenwu Qin, Yanling Zhang, Weisheng Liu, *, Minyu Tan, and Ning Tang
ANALYTICAL LETTERS Vol. 36, No.1, pp. 159-172, 2003,-0001,():
-1年11月30日
A new ligand; 1,7-bis-(2'-carboxylphenyl)-1,4,7-trioxaheptane (BCPTH), its fluorescence intensity with terbium (III) was increased by more than two orders of magnitude in the present of sodium acetate (NaAc) or hexamethylene tetramine (HMTM) solution. Following the addition of organic solvents to the above system leading to the Tb3+ fluorescence was further enhanced by about an order of magnitude. The enhancement was observed to be highest with NaAc and dimethyl sulfoxide (DMSO) solvent. The spectrofluorimetric determination of trace amount of Tb3+ based on the phenomenon was carried out. The excitation and emission wavelengths are 296nm and 54nm, respectively. Under optimal conditions, the fluorescence intensities vary linearly with the concentration of Tb3+ in the range 7.0
Terbium determination, Fluorescence enhancement, 1,, 7-bis-(, 2', -Carboxylphenyl), -1,, 4,, 7-trioxaheptane, Sodium acetate, Dimethyl Sulfoxide.,
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刘伟生, Wenwu Qin, Yanling Zhang, Weisheng Liu *, Minyu Tan
Spectrochimica Acta Part A 00(2003)1-8,-0001,():
-1年11月30日
Two open-chain carboxylate crown ether ligands and their terbium (III) and europium (III) complexes were synthesized and characterized. The terbium and europium ions were found to coordinate to the carboxylate oxygens. The fluorescence properties of europium complexes in the solid state and terbium complexes in the solid state and in the organic solvent were studied in detail, respectively. Under the excitation of ultraviolet light, strong green fluorescence of solid terbium complexes and red fluorescence of solid europium complexes were observed. These observations show that the two ligands favor energy transfer to the emitting energy level of Tb3+. Some factors that influencing the fluorescent intensity were also discussed.
Synthesis, Complexes, Infrared and fluorescence spectral properties, Open-chain carboxylate crown ethers
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刘伟生, 刘伟生**, 温永红, 刘雪原, 谭民裕
,-0001,():
-1年11月30日
合成并表征了4种碱土金属苦味酸盐与N,N,N,N'-四苯基-3,6,9-三氧杂十一烷二酰胺(TTD)的固态配合物M(Pic)2TTD(1. M=Mg,2 M=ca,3. M=sr,4. M=Ba)配合物3的结构分析表明,sr(Ⅱ)与TTD及两个二齿Pic配位,配位数为9,配位多面体为变形三帽三角棱柱,TTD作为五齿配体,其螯合链形成右手螺旋状配位结构,这种螯合螺旋链具有较为固定的螺旋半径,对金属离子有较高的配位选择性在结构上初步解释了TDD对碱土金属离子具有高选择性的原因。
碱土金属, 开链冠醚, 配合物, 螺旋状配位结构
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刘伟生, Xiaofeng Li, Weisheng Liu, *, Zhijun Guo, and Minyu Tan
Inorganic Chemistry, Vol. 42, No.26, 2003,-0001,():
-1年11月30日
Lanthanide nitrate complexes with the heptadentate ligand L (6-[2-(2-(diethylamino)-2-oxoethoxy)ethyl]-N,N,12-triethyl-11-oxo-3,9-dioxa-6,12-diazatetradecanamide), [Ln2L(NO3)6] (Ln=La, Nd, Sm, Eu, Ho), have been prepared and characterized. The X-ray crystallographic studies show that, in [La2L(NO3)6(H2O)]
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刘伟生, Tianlin Yang a, b, Wenwu Qin a, Weisheng Liu a, *
Talanta 62(2004)451-456,-0001,():
-1年11月30日
A new bis-Schiff base ligand, bis-(trimethylolaminomethane)-4-tert-butyl-disalicylicimine (HL), was synthesized. The fluorescence intensity of HL-Zn2+ complex was increased by about 8-fold upon addition of β-cyclodextrin (β-CD). The spectrofluorimetric determination of trace amounts of Zn2+ based on the phenomenon was carried out. The excitation and emission wavelengths are 405 and 465nm, respectively. Under optimal conditions, the fluorescence intensities vary linearly with the concentration of Zn2+ in the range 0-317μgl−1 with a detection limit of 1.0μgl−1. The interferences of some inorganic ions were described. The method is a selective, sensitive, rapid, and simple analytical procedure for the determination of Zn2+ in crops. The mechanism for the fluorescence enhancement was also discussed.
Zinc determination, Fluorescence enhancement, Bis-Schiff base ligand, β-Cyclodextrin
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【期刊论文】Design and coordination behavior of the first selective recognition ligand of 147Pm (III)†
刘伟生, Weisheng Liu, *, Xiaofeng Li, Yonghong Wen‡, and Minyu Tan
Daiton Trans., 2004, 640-644,-0001,():
-1年11月30日
A new amide tripodal ligand, 6-[2-(2-diethylamino-2-oxoethoxy)ethyl]-N,N, 12-triethyl-11-oxo-3,9-dioxa-6,12-diazatetradecanamide (4) has been designed and synthesized for the recognition of rare earth ions. Three representative complexes of trivalent lighter (La), middle (Gd), and heavier (Er) rare earth ions with 4 were synthesized and characterized by X-ray crystallography. In the complex, the heptadentate 4 forms a cup-like coordination cavity encapsulating the central ion. Different supramolecular complex dimers are constructed by π-π interaction and van der Waals forces in accordance with the lanthanide contraction. The differences of the cavity and dimer structures were investigated further by assessing the separation efficiency of 4 in multitrace solvent extraction of rare earth ions from picrate acid solution and the ligand has the best separation factor for 147Pm (Ⅲ).
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【期刊论文】Lanthanide Coordination Polymers and Their Ag+-Modulated Fluorescence
刘伟生, Weisheng Liu, * Tianquan Jiao, Yizhi Li, Quanzhong Liu, Minyu Tan, * Hong Wang, and Liufang Wang
J. AM. CHEM. SOC. 9 VOL. 126, NO.8, 2004,-0001,():
-1年11月30日
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