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Reduction of VOC emissions by a membrane-based gas absorption process

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Journal of Environmental Sciences 2009年第8期21卷 1096-1102页

作者： LI Rui, XU Jun, WANG Lianjun, LI Jiansheng, SUN Xiuyun school of chemical engineering, nanjing university of Science and Technology, nanjing 210094, china. [a]school of chemical engineering Nanjing University of Science and Technology Nanjing 210094 China. E-mail: drbeaneyes@***

A membrane-based gas absorption （MGA） process was evaluated for the removal of volatile organic compounds （VOCs） based on C6H6/N2 mixture. The absorption of C6H6 from a C6H6/N2 mixture was investigated using a hydrophobic polypropylene hollow fiber membrane contactor and the aqueous solution of N-formyl morpholine （NFM） as absorbent. The effects of various factors on the overall mass transfer coefficient was investigated. The experimental results showed that the removal efficiency of C6H6 could reach 99.5% in present studied system. A mathematical model based on resistance-in-series concept was presented to predict the value of overall mass transfer coefficient. The average error between the predicted and experimental values is 7.9%. In addition, conventional packed columns for VOCs removal was also evaluated for comparison.

关键词： VOCs removal membrane contactor membrane-based gas absorption mass transfer model

Synthesis and Lubrication of Phosphorylcholine Derivative

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Journal of Bionic engineering 2010年第3期7卷 254-258页

作者： Zhenliang Qiao~1, Dangsheng Xiong~1, Lude Lu~2, Pengju Jiang~2 1. Department of Materials Science and engineering, nanjing university of Science and Technology, nanjing 210094, P.R. china 2. school of chemical engineering, nanjing university of Science and Technology, nanjing 210094, P. R. china [a] Department of Materials Science engineering Nanjing University of Science Technology Nanjing 210094 P.R. China [b] School of Chemical Engineering Nanjing University of Science Technology Nanjing 210094 P. R. China

The monomer of phosphorylcholine derivative, O-(5-（2-methacryloxy）-3, 3-dimethyl-3-azapentyl)-O’-（ω-hydroxy-octyl）-phosphatequaternary ammonium salt, was designed and synthesized successfully. It was characterized by the spectra ofHNMR and Mass spectra （ESI+）, and every signal was assigned. Then the lubricating characteristics of the phosphorylcholinederivative were investigated on the tribological setup of ball-oh-flat. The Ultra-High Molecular Weight Polyethylene（UHMWPE） flat was rotated against a stainless steel ball with 6 mm diameter. The load was 2.3 N, which corresponded to amaximal Hertz contact pressure of 29 MPa. Water, phosphorylcholine derivative, and Acrylic Acid （AA） solution were used aslubricants, respectively. Compared with AA, the phosphorylcholine derivative shows significant lubrication. It can be stronglyhydrated under water due to the charged segment in chemical structure. The thick water layers within the chains serves asboundary lubricants, and this is thought to be the molecular origins of lubricating behavior.

关键词： artificial joint articular cartilage molecular lubrication mechanism phosphorylcholine synthesis UHMWPE

Study on specific interaction of new ferrocene-substituted carborane conjugates with hemoglobin protein

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Science china chemistry 2012年第4期55卷 594-603页

作者： WU ChunHui1,3, YE HongDe2, JIANG Hui1, WANG XueMei1 & YAN Hong2 1State Key Lab of Bioelectronics (Chien-Shiung Wu Lab), Southeast university, nanjing 210096, china 2State Key Laboratory of Coordination chemistry school of chemistry and chemical engineering, nanjing university, nanjing 210093, china 3school of Life Science and Technology, university of Electronic Science and Technology of china, Chengdu 610054, china 1. State Key Lab of Bioelectronics (Chien-Shiung Wu Lab) Southeast University Nanjing 210096 China3. School of Life Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China2. State Key Laboratory of Coordination Chemistry school of chemistry and chemical engineering Nanjing University Nanjing 210093 China

The interactions between the new organometallic complexes, ferrocenesubstituted dithioocarborane conjugates （denoted as FcSB1, FcSB2 and FcSBCO） and hemoglobin （Hb） are investigated by electrochemistry, fluorescence and UVvis absorption spectroscopy. The results demonstrate that FcSB1, FcSB2 and FcSBCO can bind to the heme iron center through the replacement of the weakly bound H20/02 in the distal heme pocket of Hb by their sulfur donor atoms, inducing the allosteric change from the R state （oxygenated conformation, relax） to T state （deoxygenated conformation, tense）. The binding affinity is in the order of FcSBCO〉FeSB2〉FeSB1. Moreover, the fluorescence study illustrates that the three ferrocenecarborane conjugates differently affect the quarterly and tertiary structures as well as the polarity in the surrounding of the Trp and Tyr residues in Hb. Typically, FcSB2 mainly induces alterations of the microenvironment around the 1337Trp residue which is located on the cql32 interface of Hb. Such distinct influences are attributed to the structural features of FcSB1, FcSB2 and FcSBCO containing hydrophobic ferrocenyl and carboranyl units as well as C=O group. Screening the proteinbinding behavior can signify the potential bioactivity of such molecules and may be helpful in the future development of promising multifunctional metallodrugs.

关键词： fluorescence – UV vis absorption spectroscopy – differential pulse voltammetry – biomolecular interaction – ferrocene substituted carborane conjugates – hemoglobin

FLUORESCENCE　STUDIES　ON　SELF－ASSEMBLING　BEHAVIOR　OF　AMPHIPHILES　WITH　NAPHALENE－1，5－DIOXY　GROUP

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Chinese chemical Letters 1996年第8期7卷 735-736页

作者： Guo Wen LI Ying Qiu LIANG2(Institute of Theoretical chemistry, Jilin university, Changchun, 130023)(Department of chemistry, nanjing university, nanjing 210093) Institute of Theoretical chemistry Jilin University Changchun 130023 Department of chemistry Nanjing University Nanjing 210093

Fluorescene Spectra in dilute aqueous solution of a series of single chain amphiphileswith an interposed naphthalene-1,5-dioxy group were studied to elucidate the characteristic selfassembling behavior. which indicate... 详细信息

关键词： STABLE BILAYER ASSEMBLIES SINGLE-CHAIN AMPHIPHILES DILUTE AQUEOUS-SOLUTION

In－situ　Thin　Layer　Spectroelectrochemical　Study　of　the　Redox　Mechanism　add　Intermediate　for　Vitamin　B_2　in　Aqueous　Solution

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Chinese chemical Letters 1996年第9期7卷 825-828页

作者： Yong Jun MA Shi Min ZHU(Department of chemistry, nanjing university,nanjing,210093) Department of chemistry Nanjing University Nanjing 210093

The electrochemical reaction mechanism of Vitamin B2 on platinum electrode in acid aqueous solution has been studied by then layer cyclic voltammetry(TLCV) and thin layer spectroelectrochemistry (TLSEC).The results indicate that there is a redox process of VB2 via a semiquinone radical to dihydroflavin. The radical intermediate has been detected by in-situ UVSEC method for the first time.

关键词： Thin Layer Aqueous Intermediate

Anion Adsorption on an Au Colloid Monolayer Based Cysteamine-Modified Gold Electrode

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chemical Research in Chinese Universities 2001年第2期17卷 159-167页

作者： HU Xiao-ya, XIAO Yi and CHEN Hong-yuan (Department of chemistry, The State Key Laboratory of Coordination chemistry, nanjing university, nanjing 210093, P. R. china) nanjing Univ Dept Chem State Key Lab Coordinat Chem Nanjing 210093 Peoples R China

Anion adsorption behavior on Au colloid surface was investigated in virture of depositing monolayers of Au colloid on the self-assembled monolayers of cysteamine on a gold electrode. Po- tential-dependent anion adsorption-desorption waves via the nonfaradaic current were obtained by means of cyclic voltammetry at Au coltoid-modified gold electrodes in the potential range of -2 00-600 mV. The adsorption sequence in the order of adsorption peak potentials (Epa) is OH- >citrate3 ->H2PO4- >Cl->SO42->ClO4->NO3-. Among them, citrate3- exhibited an en- tirely irreversible adsorption. A rise in temperature can increase the rates of adsorption-desorp- tion and improve the reversibility of the adsorption-desorption of Cl-, SO42-, ClO4-, NO3- and H2PO-4. The adsorption peak potentials shifted more negatively for Ca. 63 mV as the anion con- centrations were increased by a decade factor. The change of pH from 7 to 1 slightly affected the adsorption peak potentials of Cl- and NO3-. Au colloids with a smaller size (16 nm) gave rise to a better reversibility of the adsorption-desorption process and lower adsorption currents. The ex- perimental results of citrate ions adsorption on Au colloid surface show that Au colloids with a smaller size prepared by sodium citrate method exhibited a higher stability in the solution in com- parison to those with larger sizes because of its higher ratio of charge/mass. In other words, the smaller gold nanoparticles are covered with citrate ions monolayer that can also be formed at larg- er gold nanoparticles by means of electrochemical scan.

关键词： Colloidal gold Self-assembled monolayer Gold electrode Electrode dynamics

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 nanjing Univ Inst Coordinat Chem Nanjing 210093 Peoples R China nanjing Univ State Key Lab Coordinat Chem Nanjing 210093 Peoples R 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.

The combination of benzamides/NCS as nitrogen/halogen sources for aminohalogenation of β-nitrostyrenes resulting in dichlorinated haloamides

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Science china chemistry 2010年第9期53卷 1946-1952页

作者： ZHI SanJun1,2,MEI HaiBo1,ZHANG GuangQian1,SUN Hao1,HAN JianLin1,LI GuiGen4 & PAN Yi1,3 1 school of chemistry and chemical engineering,nanjing university,nanjing 210093,china 2 school of chemistry and chemical engineering,Huaiyin Normal university,Huai’an 221003,china 3 State Key Laboratory of Coordination chemistry,nanjing university,nanjing 210093,china 4 Department of chemistry and Biochemistry,Texas Tech university,Texas 79409-1061,USA 1. school of chemistry and chemical engineering Nanjing University Nanjing 210093 China2. School of Chemistry and Chemical Engineering Huaiyin Normal University Huai’an 221003 China4. Department of Chemistry and Biochemistry Texas Tech University Texas 79409-1061 USA3. State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210093 China

The combination of benzamide and NCS was found to be an efficient nitrogen/halogen source for aminohalogenation of β-*** reaction was convenient to carry out by using 4-dimethylaminopyridine as the catalyst,resulting in vicinal dichlorinated haloamino nitroalkanes with opposite regiochemistry to that generated from other electron-deficient olefins observed *** reaction proceeded smoothly at room temperature with good yields and excellent regioselectivities.A mechanism involving a chloronium intermediate was proposed to explain the resulting *** current system explored a new type of nitrogen sources for aminohalogenation of functionalized olefins.

关键词： aminohalogenation benzamide β-nitrostyrenes DMAP haloamides

Predicting bioconcentration factor values of organic pollutants based on medv descriptors derived QSARs

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Science china chemistry 2007年第5期50卷 587-592页

作者： CUI ShiHai1,2, YANG Jing1, LIU ShuShen2,3 & WANG LianSheng2 1 College of chemistry and Environment, nanjing Normal university, nanjing 210097, china 2 State Key Laboratory of Pollution Control and Resources Reuse, school of the Environment, nanjing university, nanjing 210093, china 3 Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and engineering, Tongji university, Shanghai 200092, china 1. College of chemistry and Environment Nanjing Normal University Nanjing 210097 China 2. State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China 3. Key Laboratory of Yangtze Aquatic Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai 200092 China

The molecular electronegativity-distance vector (MEDV) is employed todescribe the chemical structure of organic *** linear relationships between themolecular descriptors and BCF values are developed by best subset regression and partial leastsquare regression *** main structural factors influencing the bioactivities are -CH2,-X,-Cnot 2 and q2_(LOO) present good estimation ability and stabilityof *** prediction power for external samples is validated by the model developed from thetraining set.

关键词： POPs, BCF, MEDV, QSAR