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The Characteristic of Electrochemical Oxidation of Aniline on SnO_2/Ti Electrode

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wuhan university Journal of Natural sciences 2001年第4期6卷 836-840页

作者： Wang Yu ling, Cai Nai cai , Huo Yao dong, Chen Hao college of chemistry and molecular Science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Molecular Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The characteristic of electrochemical oxidation of aniline on SnO 2/Ti electrode is studied. The results indicate that SnO 2/Ti electrode doped F plays a wonderful role in the oxidation of aniline comparing with Pt electrode. The kinetics factors that influence the oxidation rate of aniline on the SnO 2/Ti electrode are determined by the dissolving of the film on the electrode. The dissolving of the film consisted of intermediate products on the electrode is the slow step. The effects of aniline concentration, pH in aniline solution and the current density( i )on the rate of aniline oxidation, the complexity of intermediate products and the basic category of the intermediate products consisted of the film are introduced.

关键词： electrochemical oxidation SnO 2/Ti aniline

Determination of abscisic acid based on the fluorescent quenching of quantum dots

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Science china chemistry 2010年第1期53卷 245-249页

作者： ZHANG Lei,GUAN HongLiang & HE zhiKe Key Laboratory of Analytical chemistry for Biology and Medicine,Ministry of Education college of chemistry and molecular sciences,wuhan university,wuhan 430072,china 1. Key Laboratory of Analytical chemistry for Biology and Medicine Ministry of Education college of chemistry and molecular sciences Wuhan University Wuhan 430072 China

The quenching mechanism of the fluorescence of quantum dots by abscisic acid has been systematically *** quenching constant KSV = 5.1 × 1011 / M was obtained under the optimized *** the basis of that,a very sensitive method for the determination of abscisic acid has been *** linear equation was F0/F = 0.9309 + 0.5072 C(pmol/L) and its linear range was 0.2-3.0 pmol/L with a correlation coefficient of *** limit of detection was 0.09 pmol/L.

关键词： abscisic acid quantum dots superquenching

Spectrofluorimetric Determination of Magnesium (Ⅱ) with 7-(8-Hydroxy-3, 6-Disulfonaphthylazo)-8-Hydroxyquinoline-5-Sulfonic Acid

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wuhan university Journal of Natural sciences 2001年第4期6卷 831-835页

作者： Zhang Xian, Wang Hong, Zhang Hua shan college of Chemisitry and molecular Science, wuhan university, wuhan 430072, china college of chemistry and molecular Science Wuhan University Wuhan China

A new fluorescent reagent, 7 (8 hydroxy 3, 6 disulfonaphthylazo) 8 hydroxyquinoline 5 sulfonic acid (HDNHQ) for the determination of magnesium has been developed. It reacted with magnesium to form a 1∶1 fluorescent complex with λ ex / λ em =356/495 nm immediately at room temperature in ammonia ammonium chloride buffer (pH 10.7). A linear relationship was obtained in the magnesium concentration range of 0 160 ng·mL -1 with the detection limit of 0.04 ng·mL -1 . The proposed method was simple, rapid and sensitive. It has been successfully applied to the determination of trace magnesium in blood serum with recoveries of 103.75% and 98.16%, respectively.

关键词： Hydroxy 3 6 disulfonaphthylazo) 8 hydroxyquinoline 5 sulfonic acid magnesium spectrofluorimetry blood serum

Spectrofluorimetric Method for the Determination of Triamcinolone Acetonide

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wuhan university Journal of Natural sciences 2004年第3期9卷 353-358页

作者： PanZu-ting YuJun-ping collegeofchemistryandmolecularsciences WuhanUniversityWuhan430072HubeiChina

A simple and highly sensitive method for the determination of triamcinolone acetonide in pharmaceutical formulations is presented. The approach is based on the fluorescence of production of triamcinolone acetonide oxidized by concentrated sulfuric acid. The effect of H2SO4, β-cyclodextrin (β-CD), solvent and cetyltrimethylammonium bromide (CTMAB) were discussed. And two analytical systems were established. One is CTMAB system, the linear range is 0–4.6×10?6 mol/L, and the detection limit is 3.59×10?8 mol/L. The other is β-CD and ethanol system, the linear range is 0–2.3×10?6 mol/L and the detection limit is 1.91×10?8 mol/L. The selectivity of analysis, the analytical figures of optimization, and the accuracy of the method are demonstrated with the determination of triamcinolone acetonide in pharmaceutical preparations. Key words triamcinolone acetonide - fluorimetry - CTMAB - β-cyclodextrin - pharmaceutical analysis CLC number O 657.39 Foundation item: Supported by the National Natural Science Foundation of china (20275028)Biography: Pan Zu-ting (1945-), male, Professor, research direction: analytical chemistry.

关键词： triamcinolone acetonide fluorimetry CTMAB β-cyclodextrin pharmaceutical analysis

Synthesis and Antibacterial Activities of Selenide Derivatives of Benzisoselenazolone

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wuhan university Journal of Natural sciences 2001年第4期6卷 851-853页

作者： Yang Li ping, Wu jun, Peng Yun shan, Liu Xiu fang, Xu Han sheng college of chemistry and molecular, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Molecular Wuhan China (GRID:grid.49470.3e) (ISNI:***)

A series of Benzisolselenazolone (BISA) derivatives were synthesized and evaluated for their antibacterial activities againstE coli. by using LKB-2277 bioactivity monitor. Other bioactivities were tested by the method of High Throughput Screening for pharmaceutical activity compounds (HTP) BISA derivatives 3b, at the concentration of 40 μg/mL, showed 100%antibacterial activity and 62%inhibition rate of aldose reductase (at the concentration of 5μg/mL). These new compound structures have determined by IR,1H NMR and MS spectra.

关键词： BISA Ebselen antibacterial activity NO synthase Aldose reductase

Study on Synthesis and Biological Activities of Novel Water-Soluble Metalloporphyrins

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wuhan university Journal of Natural sciences 2001年第4期6卷 841-845页

作者： Li Zao-ying, Zhang Yue ning, Xiao Wei, Zhu Xun jin,gao Zhen ting, Liu Yi college of chemistry and molecular Science, wuhan university, wuhan, 430072, china wuhan university College of Chemistry and Molecular Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The synthesis and characterization of a series of metal porphyrins, MII(Por), {Por=dianionic of 5, 10, 15, 20-tetrakis [4-(4′-bromobutyloxy) phenyl]porphyrinato and 5, 10, 15, 20-tetrakis [4-(4′-butyloxypyridine bromide)phenyl]porphyrinato, M=Zn, Cu, Mn, Co, Ni, Ru-CO} were described. The complexes 3a-3e were prepared from the reactions of compound 2 with metal acetates in chloroform, and the treatment of 3a-3f with excess of pyridine gave corresponding complexes 4a-4f. These new compounds were identified by absorption spectroscopies,1H-NMR and elemental analyses. The results of biological activity testing for 4a-4f revealed that 4a and 4c had stronger inhibiting action on the growth metabolism ofEsche richia coli.

关键词： water soluble metalloporphyrin synthesis structure characterization biological activity testing

Porous Spherical Cellulose Composites Coated by Aluminum (Ⅲ) Oxide and Silicone: Preparation, Characterization and Adsorption Behavior

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wuhan university Journal of Natural sciences 2001年第3期6卷 733-736页

作者： Meng Ling zhi, Du Chuan qing, Chen Yuan yin, He Yong bing, Jiang Juan, Wan Shu hui college of chemistry & molecular Science, wuhan university, wuhan 430072, china college of chemistry & molecular Science Wuhan University Wuhan China

Porous spherical cellulose composite (PSCA) coated by aluminum(Ⅲ) oxide was prepared and modified by organosilicone. SEM images of the surface morphology of the bead cellulose shows that it has spherical shape and abundant porous structure on its surface. The mapping images of aluminum and silicon of the composite (PSCAS) present aluminum(Ⅲ) oxide and silicone are uniformly dispersed on the surface. The adsorption behavior of PSCAS toward metal ions was determined.

关键词： cellulose composites spherical cellulose aluminum oxide silicome adsorption

Synthesis and Characterization of Polyamide-Containing 2, 6-(Substituded) pyridine Derivatives

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wuhan university Journal of Natural sciences 2006年第3期11卷 682-686页

作者： XU Kuoxi HU Peizhi CAI Lihua Colliege of chemistry and molecular sciences Wuhan University Wuhan 430072 Hubei China

A new series of acyelic aromatic polyamide pyridine derivatives a-h and a new macrocyclic polyamide containing pyridine ring i were synthesized by the reaction of N^2, N^6-his（2-aminoethyl） pyridine-2, 6-dicarboxamide or N^2 , N^6-bis （3-aminopropyl） pyridine-2,6-dicarboxamide with various acyl chloride. The compounds were characterized by MS, ^1H NMR, IR and elemental analysis. The single-crystal structure of g confirmed that the crystal is of triclinic, space group P-1 with Mr = 487.55, α=9.3031（19）, b=12.167（2） , c=126.50（3） nm, α=108.91（3）°, β= 97. 57（3）°, γ=102.07（3）°, Ⅴ= 1 293.5 nm, Z=2, Dc=1. 252 kg/m^3, μ=0. 086 mm^-1, F（000）=516, X-ray analysis reveals that there exist hydrogen bonding and network structure in the crystal.

关键词： polyamide pyridine derivative synthesis crystal structure

A New Synthetic Route for 2,4-Dibromo-5-fluorobenzoic Acid

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Chinese Chemical Letters 1998年第9期9卷 797-798页

作者： Qiong ZHENG Chi HUANG Chong Wen XU Guang Yong XIE gao Qing CHEN Yuan Yin CHEN (college of chemistry, wuhan university, wuhan 430072) wuhan Univ Coll Chem Wuhan 430072 Peoples R China

A convenient and practical synthetic route for 2,4-dibromo-5-fluorobenzoic acid is described. Two intermediates, 2,4-dibromo-5-fluorobenzonitrile and 2,4-dibromo-5-fluorobenzamide, have not been reported before. This ... 详细信息

关键词： 2,4-dibromo-5-fluorobenzoic acid 2,4-dibromo-5-fluorobenzonitrile ammoxidation fluoroquinolone