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Syntheses,crystal structures and properties of three novel coordination polymers with tripodal imidazole-containing ligands and benzenetetracarboxylate

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Science china chemistry 2010年第10期53卷 2164-2169页

作者： SU Zhi, FAN Jian & SUN WeiYin State Key Laboratory of coordination chemistry nanjing National Laboratory of Microstructures coordination chemistry institute, school of chemistry and chemical engineering, nanjing university, nanjing 210093, china State Key Laboratory of coordination chemistry nanjing National Laboratory of Microstructures coordination chemistry institute School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Three novel coordination polymers, [Ni2(tib)2(btec)]·2H2O (1), [Co2(tib)2(btec)]·2H2O (2) and [Zn4(tib)2(btec)Cl4]·2H2O (3), have been synthesized by using mixed ligands of 1,3,5-tris(1-imidazolyl)benzene (tib) and 1,2,4,5-benzenetetracarboxylic acid (H4btec) under hydrothermal conditions. Complexes 1 and 2 have the same structure and are rare three-dimensional (3D) self-penetrating (3,4,5)-connected nets, while complex 3 is an unprecedented (3,4)-connected 3D net. The different structures of 1 (2) and 3 are ascribed to the distinct coordination geometry of the metal centers. The thermal stability and photoluminescence property of the complexes were investigated.

关键词： coordination polymer self-penetration crystal structure thermal stability photoluminescence property

Two novel interpenetrated zinc(Ⅱ) and cadmium(Ⅱ) coordination polymers based on 4-imidazole-benzoate:Syntheses,crystal structures and properties

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Science china chemistry 2009年第4期52卷 459-464页

作者： BAI ZhengShuai,CHEN ShuiSheng,ZHANG ZhengHua,CHEN ManSheng,LIU GuangXiang & SUN WeiYin State Key Laboratory of coordination chemistry,institute of coordination chemistry,school of chemistry and chemical engineering,nanjing university,nanjing 210093,china State Key Laboratory of coordination chemistry Institute of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Two novel interpenetrated coordination polymers,[Zn(IBA)2]n (1) and {[Cd(IBA)2(H2O)].4H2O}n (2),have been synthesized by using 4-imidazole-benzoic acid (HIBA) as ligand under hydrothermal con-ditions. Complex 1 crystallizes in a chiral space group and has a two-fold interpenetrated 2D network structure with (4,4) topology,while complex 2 is a 3D porous dia network with four nets interpene-trating each other. The SHG activity of 1 and the photoluminescent property of 2 have been investi-gated.

关键词： coordination polymer interpenetration crystal structure photoluminescence property

Inclusion Behavior of Dimer β-CyclodextrinBridged with Aspartic Acid Derivative

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Chinese chemical Letters 2001年第2期12卷 119-120页

作者： Le Xin SONG coordination chemistry institute & State Key Laboratory of coordination chemistry, nanjing university, nanjing 210093 coordination chemistry institute State Key Lab. of Coord. Chemistry Nanjing University Nanjing 210093 China

The (β-cyclodextrin (CD) dimer bridged with aspartic acid (ASP) derivative, FITC-ASP(NH-(-CD)2 (Host, FITC=fluorescein-4-isothiocyanate), was synthesized. Fluorescence polarization study showed that the novel host formed an inclusion compound, [FITC-ASP(NH-(-CD)2]ATA, for which Kd was determined to be 5.0×10-6 mol/L by Beacon 2000 Analyzer, when ATA (Guest) = Adm-Trp-Arg-Arg-NH2 (Adm = 1-adamantanecarboxylic acid, Trp = tryptophan, Arg = arginine), where Kd is the dissociation constant in aqueous solution at 298 K.

关键词： β-Cyclodextrin amino acid peptide inclusion compound fluorescence polarization.

Optical applications of quantum dots in biological system

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Science china chemistry 2011年第8期54卷 1177-1184页

作者： WANG Wei & ZHU Jun-Jie State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering, nanjing university, nanjing 210093, china State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering Nanjing University Nanjing China

This review presents a simple introduction on the unique properties and general synthesis of quantum dots (QDs) in which we lay emphasis on the optical applications in the biological system. The detection of biological molecules such as DNA, protein and enzyme, the cell-based analysis and in vivo animal imaging are mainly discussed.

关键词： quantum dots optical application biological system

Two bimetallic W(Ⅳ)-Mn(Ⅱ) complexes based on octacyanometallates:structures and magnetic properties

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Science china chemistry 2009年第11期52卷 1801-1807页

作者： LIU BaoLin,XIAO HongPing,SONG You & YOU XiaoZeng State Key Laboratory of coordination chemistry,nanjing National Laboratory of Microstructures,school of chemistry and chemical engineering,nanjing university,nanjing 210093,china State Key Laboratory of coordination chemistry Nanjing National Laboratory of Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Two cyano-bridged heterobimetallic coordination polymers,[{Mn(dpa)2}2W(CN)8·CH3CN·4H2O]n(1)(dpa = 2,2'-dipyridylamine) and [Mn2(H2O)4{W(CN)8}·3H2O]n(2),have been synthesized and characterized structurally and magnetically.X-ray analysis shows that complex 1 is a one-dimensional(1-D) polymer of W2(CN)4Mn2 square units in which adjacent square fragments are interlinked by sharing [W(CN)8]4-moieties to form an infinite *** 2 is a three-dimensional(3-D) polymer,which shows an unforeseen structure,exhibiting a 3-D open network with a 1-D channel(ca.13.21  × 11.82 ).Fitting of the magnetic properties indicates that both polymers exhibit weakly antiferromagnetic interactions between the adjacent Mn ions.

关键词： cyano-bridged coordination polymer magnetic property manganese(Ⅱ) complex

Regioselective aminohalogenation of β-nitrostyrenes using NCS and NBS as nitrogen/halogen sources

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Science china chemistry 2010年第1期53卷 140-146页

作者： ZHI SanJun1,2,SUN Hao2,LIN Chen2,ZHANG GuangQian2,LI GuiGen4 & PAN Yi2,3 1 Department of chemistry,Huaiyin Normal university,Huai’an 221003,china 2 school of chemistry and chemical engineering,nanjing university,nanjing 210093,china 3 State Key Lab of coordination chemistry,nanjing university,nanjing 210093,china 4 Department of chemistry and Biochemistry,Texas Tech university,Lubbock,Texas 79409-1061,USA Department of chemistry Huaiyin Normal University Huai’an China school of chemistry and chemical engineering Nanjing University Nanjing China Department of chemistry and Biochemistry Texas Tech University Lubbock USA State Key Lab of coordination chemistry Nanjing University Nanjing China

Aminohalogenation reaction of β-nitrostyrenes with N-halosuccinimides(N-chloro and N-bromosuccinimides) has been successfully conducted by using nickel acetate as a catalyst in the presence of potassium carbonate and succinimide as *** reaction was easily performed at room temperature under nitrogen gas protection to give dihalorinaed haloamino products in good to excellent yields(60%-98%).The structure has been confirmed by X-ray crystal structure analysis.

关键词： aminohalogenation vicinal haloamines β-nitrostyrenes NBS NCS

Magnetic particles and cadmium sulfide nanoparticles tagging for signal-amplifying detection of nucleic acids

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Science china chemistry 2011年第8期54卷 1304-1310页

作者： DONG XiaoYa, ZHAO WeiWei, XU JingJuan & CHEN HongYuan State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering, nanjing university, nanjing 210093, china State Key Laboratory of Analytical chemistry for Life Science school of chemistry and chemical engineering Nanjing University Nanjing China

A versatile DNA recognition system using cadmium sulfide nanoparticles (CdS NPs) as labels was proposed for ultrasensitive detection of specific sequence DNA based on target recycling. This strategy utilized the magnetic particles (MNPs) for the immobilization of linker DNA and CdS NPs and the subsequent target DNA hybridization. Using the unique characteristic of nicking endonuclease for cutting one specific strand of double strand DNA (ds DNA), the linker DNA could be transected and the target DNA could be liberated for re-hybridization and hence the amount of released CdS NPs was enhanced. Due to the advantage of the MNPs and signal amplification from the target recycling, the analyte DNA could be detected by the square-wave stripping voltammetry (SWV) in a wide linear range from 0.4 fM to 100 fM with the detection limit down to 0.08 fM. The proposed DNA detection strategy possesses high sensitivity, satisfactory reproducibility and excellent stability, which might have potential in other DNA biological assays.

关键词： CdS nanoparticles square wave stripping voltammetry nicking endonuclease electrochemical DNA assay

Polymer-assisted nanoparticulate contrast-enhancing materials

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Science china chemistry 2010年第3期53卷 479-486页

作者： DING Yin1,3,HU Yong2,WU Wei1 & JIANG XiQun1 1Laboratory of Mesoscopic chemistry and Department of Polymer Science and engineering,College of chemistry & chemical engineering,nanjing university,nanjing 210093,china 2National Laboratory of Solid State Microstructure,Department of Material Science and engineering,nanjing university,nanjing 210093,china 3Key Laboratory of Analytical chemistry for Life Science,Ministry of Education,school of chemistry and chemical engineering,nanjing university,nanjing 210093,china Laboratory of Mesoscopic chemistry and Department of Polymer Science and engineering College of Chemistry & Chemical Engineering Nanjing University Nanjing China Key Laboratory of Analytical chemistry for Life Science Ministry of Education School of Chemistry and Chemical Engineering Nanjing University Nanjing China National Laboratory of Solid State Microstructure Department of Material Science and Engineering Nanjing University Nanjing China

The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and signal transduction tools for the detection of trace levels of *** photosensitivity of the fluorophores,however,limits their application in such complex environments as living bio-systems where degradation or photobleaching *** nanoparticles have unique and stable optical,electrical,magnetic and catalytic properties because of their various shapes,sizes and *** potential of the nanoparticles as novel imaging agents has been studied as a possible solution to this *** modification of inorganic nanoparticles could enhance their biostability in physiological conditions and ability of targeting bioactive molecules.

关键词： contrast agent cell image gold nanoparticles iron oxide nanoparticles carbon nanotubes polymeric-inorganic hybrid nanoparticles

Theoretical Study on the Structures, Vibrational Spectra, and the Nature of the Intermediate Hydrogen Bond of Schiff Bases

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Chinese chemical Letters 1997年第4期8卷 323-326页

作者： Yong ZHANG Cun Yuan ZHAO Xiao Zeng YOU(coordination chemistry institute, nanjing university, nanjing 210093) coordination chemistry institute Nanjing University Nanjing 210093 China

Semi-empirical method PM3 was used to study the geometry and vibrational spectrum of N-(2-hydroxy-l-naphthyl-methylene)-l-pyrenamine (NPY) with the intermediate hydrogen bond. Results are comparable to experimentations. Based on results of both NPY and its model, N-(2-hydroxy-l-naphthyl-methylene)aniline, it was found that the N-(2-hydroxy-l-naphthyl-methylene) group is principally responsible for the special hydrogen bonding through conjugation effect.

关键词： Nature and the Nature of the Intermediate Hydrogen Bond of Schiff Bases Vibrational Spectra Theoretical Study on the Structures