Chinese Journal of Chemistry

Cover image for Chinese Journal of Chemistry

July, 2010

Volume 28, Issue 7

Pages 1057–1305

  1. Full Papers

    1. Top of page
    2. Full Papers
    3. Note
    1. Excited State Intramolecular Proton Transfer of New Diphenyl- ethylene Derivatives Bearing Imino Group: A Combination of Experimental and Theoretical Investigation (pages 1057–1068)

      Fang Gao, Xiaolin Zhong, Qi Wang, Hongru Li and Shengtao Zhang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090186

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      In this paper, we described the synthesis and characterization of new diphenylethylene bearing imino group. We concentrated particularly on the investigation of the possibility of the excited state intramolecular charge transfer (ESIPT) of the new dyes experimentally and theoretically. The absorption and fluorescence spectroscopy of the dyes were determined in various solvents.

    2. Effect of L64 on the Phase Behavior of 1-Dodecyl-3-methylimidazolium Chloride/Water System (pages 1069–1075)

      Luyan Wang, Zhiyan Wu, Meishan Pei, Xinzhou Wu and Xutang Tao

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090187

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      The phase structure (H1 phase), which can be formed in [C12mim]Cl/H2O binary system, is not changed when L64 with a low concentration is added. However, phase transitions will occur from H1 to multiphases of H1 and cubic phases (C), then to Lα+C phases with constant [C12mim]Cl/H2O ratio and increased L64 concentration.

    3. Stabilities and Electronic Properties of Ice Nanotube Encapsulated in Single-wall Carbon Nanotube (pages 1076–1080)

      Baohua Yang, Aihua Zhang and Lin Li

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090188

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      The interwall spacing between the carbon nanotube and ice tube plays an important role in the stabilities of resultant structures. The most stable complex has optimum interwall spacing which is close to the van der Waals distance. The frontier energy bands of n-gon@(m,n) complex are mainly derived from carbon nanotube and encapsulation of ice tube can not modulate the electronic properties of CNT.

    4. Kinetics and Mechanism of Oxidation of Sarcosine by Diperiodatocuprate(III) Complex in Alkaline Medium (pages 1081–1084)

      Jinhuan Shan, Xiaoqian Wang and Ning Zhao

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090189

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      The kinetics of oxidation of sarcosine by diperiodatocuprate(III) (DPC) was studied with spectrophotometry in a temperature range of 292.2–304.2 K. The reaction was found to be first order with respect to both DPC and sarcosine. The observed rate constant (kobs) decreased with the increase of the [IO4], decreased with the increase of the [OH], and then increased with the increase of the [OH] after a turning point. A plausible mechanism of reaction was proposed and the activation parameters of the rate-determining step have been also calculated.

    5. NOx Reduction Characteristics for Different Composition Ratios of Pt/Al2O3, Rh/Al2O3 Catalyst Mixtures Using Model Gas as Reformates (pages 1085–1090)

      Jinhwa Chung, Suchol Lim, Jongju Ha, Soonho Song and Kwangmin Chun

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090190

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      This study investigated the selective catalytic reduction (SCR) of nitrogen oxides (NOx) with hydrocarbon in the presence of excess oxygen using various composition ratios of Pt/Al2O3, Rh/Al2O3 catalyst mixtures. The composition ratios were 1:1, 1:2, 2:1, 1:3, and 3:1 of 1 wt% Pt/Al2O3 and Rh/Al2O3, which are known to exhibit efficient NOx reduction at low and high temperatures among the noble metal catalysts.

    6. Isolation of Natural Colorants from Lagerstroemia indica: Kinetic and Adsorption Studies (pages 1091–1096)

      K. N. Vinod, Puttaswamy, K. N. Ninge Gowda and R. Sudhakar

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090191

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      Structures of the compounds isolated from the fruits of L. indica.

    7. Crystal Structure, Lattice Energy, and Standard Molar Enthalpy of Formation of the Complex (C11H18NO)2CuCl4 (s) (pages 1097–1102)

      Wenyan Dan, Jingtao Chen, Youying Di, Yuxia Kong, Qiang Wang, Weiwei Yang and Daqi Wang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090192

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      Crystal structure and lattice energy were obtained by X-ray crystallography. The standard molar enthalpy of formation of the complex was determined by using an isoperibol solution-reaction calorimeter.

    8. Mechanistic Study of Ozone-Water Reaction and Their Reaction Products with Gas Phase Elemental Mercury: A Computational Study (pages 1103–1113)

      Morteza Vahedpour, Manijeh Tozihi and Fariba Nazari

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090193

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      The negative value of free energy shows that channels R9, R6 and R5 may be the main channels of ozone-water products with mercury atom reaction and schematize the profile of calculated potential energy surface (kJ·mol−1) of the reaction in the graphical abstract.

    9. Thermal Decomposition Kinetics of Some Metal Complexes of 2,3-Hydroxyimino-4-phenyl-6-phenyazo-1-thia-4,5-diaza-cyclohexa-5-diene (pages 1114–1120)

      Fatih Doğan, Bedrettin Mercimek and Ismet Kaya

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090194

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      Cu(II), Zn(II) and Co(II) complexes with 2,3-hydroxyimino-4-phenyl-6-phenyazo-1-thia-4,5-diaza-cyclohexa-5-diene were synthesized. The thermal behavior of the complexes was studied by simultaneous TG-DTA technique in dynamic nitrogen atmosphere. The kinetic analysis of the thermogravimetric data related to the complexes was preformed by using several methods. The values of correlation coefficients of Arrhenius curves of ligand and metal complex are approximately 1.00. Also, it was found that the thermal stabilities and activation energies of complexes follow the order Zn(II)<Co(II)<Cu(II)<[H2L]<Ni(II), ECo(II)<EZn(II)<ECu(II)<ENi(II)<E[H2L], respectively.

    10. Chemical Stability and Electrical Property of BaCe0.7Zr0.2Nd0.1O3−α Ceramic (pages 1121–1125)

      Maoyuan Wang, Ligan Qiu and Tong Zhang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090195

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      BaCe0.7Zr0.2Nd0.1O3−α ceramic was of orthorhombic perovskite structure, with high density and good chemical stability in CO2 or water steam atmosphere at high temperature. In wet hydrogen, it was a pure protonic conductor from 500 to 600°C, a mixed conductor of proton and electron from 700 to 900°C. In wet air, it was a mixed conductor of proton, oxide ion and electron hole. At 900°C, the maximum short-circuit current density and power output density of the fuel cell were 156 mA·cm−2 and 40 mW·cm−2, respectively.

    11. Recognizing Hybrid/Mixed G-quadruplex in Human Telomeres by Using a Cyanine Dye Supramolecule with Confocal Laser Scanning Microscopy (pages 1126–1132)

      Qianfan Yang, Junfeng Xiang, Shu Yang, Qiuju Zhou, Qian Li, Aijiao Guan, Xiufeng Zhang, Hong Zhang, Yalin Tang and Guangzhi Xu

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090196

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      A novel cyanine dye supramolecular system has been fabricated to recognize hybrid/mixed G-quadruplexes from other DNA motifs with confocal laser scanning microscopy.

    12. Monitoring of Anti Cancer Drug Letrozole by Fast Fourier Transform Continuous Cyclic Voltammetry at Gold Microelectrode (pages 1133–1139)

      Parviz Norouzi, Mohammad Reza Ganjali, Mahnaz Qomi, Ali Nemati Kharat and Hassan Ali Zamani

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090197

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      A continuous cyclic voltammetric study of letrozole at gold microelectrode was carried out. The proposed detection method has some of advantages, the greatest of which are as follows: first, it is no more necessary to remove oxygen from the analyte solution and second, this is a very fast and appropriate technique for determination of the drug compound in a wide variety of chromatographic analysis methods.

    13. Highly Selective Potentiometric Oxalate Ion Sensors Based on Ni(II) Bis-(m-aminoacetophenone)ethylenediamine (pages 1140–1146)

      Aruna Rawat, Sulekh Chandra and Anjana Sarkar

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090198

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      A plasticized PVC (polyvinyl chloride) membrane based oxalate ion selective electrode has been developed by using the condensation product of m-aminoacetophenone and ethylenediamine. The transition metal complexes of the ligand N,N′-bis(m-aminoacetophenene)ethylenediamine (L) were synthesized and incorporated as ionophore for the synthesis of oxalate ion selective electrodes.

    14. Nanoporous Lanthanum Tungstate: A Viable Adsorbent for Heavy Metals and Organic Pollutants (pages 1147–1152)

      Mansoor Anbia and Seyed Nezameddin Ashrafizadeh

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090199

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      Removal of heavy metal cations from synthetic and industrial electroplating effluents by means of mesoporous lanthanum tungstate sorbents was thoroughly investigated. Three types of such sorbents, namely I-LT, II-LT and III-LT, uncalcined and calcined, were produced and characterized by means of X-ray diffraction, nitrogen sorption isotherms and thermogravimetry analysis (TGA).

    15. Sorption Mechanism of Cadmium from Aqueous Solution on Iron Sulphide (pages 1153–1158)

      S. Mustafa, D. Misbahud, Y. H. Sammad, M. I. Zaman and K. Sadullah

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090200

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      The sorption of the Cd2+ was observed to increase with the increase in pH but not strongly sensitive to temperature. The adsorption data fitted both the Kurbatov and Langmuir adsorption models. In addition, ΔG values were calculated from the values of the binding constant, which showed that the cadmium adsorption process was spontaneous in nature.

    16. Aptamer-modified AuRe Nanoalloy Probe for Trace Hg2+ Using Resonance Scattering as Detection Technique (pages 1159–1164)

      Zhiliang Jiang, Jing Zhang, Guiqing Wen, Aihui Liang, Qingye Liu, Caiyan Kang and Xingcun He

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090201

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      The AuRe nanoalloy particles in molar ratio of 9:1 were prepared by sodium borohydride procedure, and modified by single strand DNA (ssDNA) to prepare an aptamer AuRe nanoprobe (AuRessDNA) for Hg2+. 0.067–33.3 nmol·L−1 Hg2+ can be detected rapidly by the aptamer-modified AuRe nanoparticles RS assay, with a detection limit of 0.04 nmol·L−1 Hg2+.

    17. Near-Infrared Fluorimetric Determination of Copper(II) Ions Using CdHgTe Nanorods as Probe (pages 1165–1170)

      Mingchuan Yu, Yingqiong Jin, Xin Qi, Linjun Bao, Zhangsheng Qian and Changqing Zhu

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090202

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      Water-soluble near-infrared-emitting CdHgTe nanorods were used as probe for the selective and sensitive detection of copper(II) ions.

    18. Preparation of Immobilized Metal Affinity Chromatographic Packings by Immobilization of Carboxymethylated Asparate (CM-Asp) Based on Monodisperse Hydrophilic Non-porous Beads and Their Application (pages 1171–1176)

      Bolin Gong, Chunmiao Bo and Fuqiang Wang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090203

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      The hydrophilic immobilized metal affinity chromatographic packing was prepared by immobilization of carboxymethylated asparate (CM-Asp) as chelating ligand and Ni2+ as center ion on the base of 3.0 µm non-porous monodisperse poly(glycidylmethacrylate-co-ethylenedimethacrylate) (PGMA/EDMA) particles and their application for purification of biopolymers was investigated.

    19. Study on the Interaction between a Novel Ionic Liquid Probe and Anionic Surfactants Using Resonance Light Scattering Spectra and Its Analytical Application (pages 1177–1183)

      Weijuan Wang, Yanbo Zeng, Qiying Lu, Ying Xiao, Lei Li, Zhaoxia Ye and Ming Pang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090204

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      The ion-association complex between dodecyl sodium sulfate (SDS, a kind of anionic surfactants) and [C16mim]Br was formed by function of electrostatic and hydrophobic interaction force, which greatly enhanced the RLS intensity. Based on this, a highly sensitive, simple and rapid method has been established for the determination of anionic surfactants in the aqueous environment.

    20. A Green and Novel Method of Synthesizing 2,2′-Arylmethylene Bis(3-hydroxy-5,5-dimethylcyclohex-2-enone) Catalyzed by L-Histidine in Ionic Liquid (pages 1184–1188)

      Yan Zhang and Zhicai Shang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090205

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      An efficient and green approach to the synthesis of 2,2′-arylmethylene bis(3-hydroxy-5,5-dimethylcyclohex-2-enone) using L-histidine as the catalyst is described. In addition, room temperature ionic liquid 1-butyl-3-methylimidazonium tetrafluoroborate [bmim]BF4 was used as green recyclable alternatives to volatile organic solvents for this condensation reaction. This green catalytic system can be recycled several times with no decreases in yields and reaction rates.

    21. Catalytic and Efficient Oxidation of Urazole Derivatives to Their Corresponding Triazolinediones Using Ammonium Nitrate and Metal Hydrogen Sulfate as Catalyst (pages 1189–1192)

      Arash Ghorbani-Choghamarani, Javad Zeinivand and Shadpour Mallakpour

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090206

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      Catalytic oxidation of a variety of urazoles to the triazolinediones via combination of NH4NO3 in the presence of a catalytic amount of aluminium hydrogen sulfate has been developed at room temperature in dichloromethane.

    22. Configuration-Specific Reaction of Nitric Oxide with Aldehyde Arylhydrazones (pages 1193–1198)

      Desuo Yang, Haiyun Zhu, Yaning Guo and Longmin Wu

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090207

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      Reactions of aldehyde arylhydrazones (1) with nitric oxide in the presence of trace oxygen gave exclusively (E)-C(1′)-nitrohydrazones (2) in high yield. The structure of products was confirmed by NMR, IR, MS, and X-ray crystallography. The reaction is assumed to be initiated by addition of NO2 to the imine double.

    23. Pharmacophore Modeling and Virtual Screening of Novel Inhibitors for c-Kit Kinase (pages 1199–1206)

      Qinglin Jiang, Qian Yang, Changjun Liao, Wang Zan and Zhihe Zang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090208

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      The stem cell factor receptor (c-Kit) has been known to play critical roles in regulating numerous aspects of cellular behavior including cell growth, differentiation, migration and metabolism. In this investigation, a three-dimensional pharmacophore model of c-Kit inhibitors has been established by using the HypoGen algorithms implemented in the catalyst software package. The best quantitative pharmacophore model, hypothesis 1, which has the highest correlation coefficient (0.989), consists of one hydrogen bond acceptor, two hydrogen bond donors and one hydrophobic feature.

    24. Synthesis of Novel Spiro Pyrrolidine and Pyrrolizine Derivatives by 1,3-Dipolar Cycloaddition (pages 1207–1211)

      Xiaofang Li, Aiting Zheng, Bin Liu, Xianyong Yu and Pinggui Yi

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090209

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      The 1,3-dipolar cycloaddition of azomethine ylides derived from isatin and amino acids viz. sarcosine and proline to 2-arylmethylidene-5,6-dihydroimidazo[2,1-b]thiazol- 3(2H)-ones afforded novel spiro pyrrolidines and pyrrolizidines regio- and stereo- selectively in moderate yields.

    25. Efficient Allylation of Active Ketones Promoted by p-Nitrobenzoic Acid (pages 1212–1216)

      Zhengfeng Xie, Guilong Li, Gang Zhao and Jide Wang

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090210

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      A general and practical method of allylation of carbonyl compounds promoted by p-nitrobenzoic acid under mild reaction condition has been developed. p-Nitrobenzoic acid can be easily recovered after workup by aqueous HCl.

    26. One-pot Preparation of Fluorinated Polyhydrobenzoacridine-1-one Derivatives under Microwave Irradiation and Solvent-free Conditions (pages 1217–1222)

      Jianan Jin, Jianmin Zhang, Fengrui Liu, Wenli Shang, Yong Xin and Shizheng Zhu

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090211

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      A facile and efficient synthesis of fluorine-containing polyhydrobenzoacridines was accomplished by a three-component coupling of fluorinated aldehyde, α-naphthylamine, and 1,3-cyclohexanedione or dimedone under microwave irradiation and solvent-free conditions without catalyst. All new compounds were obtained in moderate to good yields and characterized by standard spectroscopic methods.

    27. Green and Highly Efficient Functionalization of Carbon Nanotubes by Combination of 1,3-Dipolar Cycloaddition and Curtius Rearrangement Reactions (pages 1223–1228)

      Hongdan Peng, Zhe Yang, Shu Huang and Tianxi Liu

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090212

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      We herein describe a novel synthetic strategy to graft polyamide 6 (PA6) onto the surface of single-walled carbon nanotubes (SWCNT) by anionic ring-opening polymerization, in which a green and highly efficient functionalization approach of carbon nanotubes was used for the first time by combining 1,3-dipolar cycloaddition and Curtius rearrangement reactions. The SWCNT-g-PA6 obtained could be easily dispersed in highly polar solvents such as formic acid without agglomeration.

    28. Convenient Synthesis of D-Talose from D-Galactose (pages 1229–1232)

      Hualing Xiao, Guangfa Wang, Peng Wang and Yingxia Li

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090213

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      D-Talose was synthesized from D-galactose in four steps with an overall yield of 58%. The key step was the inversion of equatorial 2-OH of galactose to the axial one by SN2 reaction.

    29. Synthesis and Bioactivity of Novel N,N′-Diacylhydrazine Derivatives Containing Furan (II) (pages 1233–1239)

      Xichen Li, Xinling Yang, Zining Cui, Ying Li, Hongwu He and Yun Ling

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090214

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      A series of novel mono- and di-acylhydrazines were designed by the replacement of part A with substituted phenyl furan. Their structures were confirmed by 1H NMR, IR, elemental analyses and single crystal X-ray diffraction analyses. The bioassay results showed good larvicidal and anti-tumor activity.

    30. Synthesis and Properties of Brominated 6,6′-Dimethyl-[2,2′-bi-1H-indene]-3,3′-diethyl-3,3′-dihydroxy-1,1′-diones (pages 1240–1246)

      Yong Chen, Meili Pang, Kaige Cheng, Ying Wang, Jie Han and Jiben Meng

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090215

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      Photochromic brominated biindenylidenediones were synthesized and characterized by X-ray single crystal analysis. Their UV spectra in solution, photochromic and photomagnetic properties in solid state were studied in detail. The results demonstrate that when the hydrogen atoms in the methyl group on the benzene rings of biindenylidenedione were substituted by bromines, its properties could be affected considerably.

    31. Commercial Zinc Oxide (Zn2+) as an Efficient and Environmentally Benign Catalyst for Homogeneous Benzoylation of Hydroxyl Functional Groups (pages 1247–1252)

      Reza Tayebee, Fatemeh Cheravi, Mehdi Mirzaee and Mojtaba M. Amini

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090216

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      The solvent-free O-acylation of some alcohols with benzoyl chloride was carried out to the corresponding benzoylated products in good to excellent yields by the mediation of a catalytic amount (5 mol%) of the commercially available and inexpensive zinc oxide in short reaction times. This methodology represents an eco-friendly and simple catalytic alternative for benzoylation of primary, secondary, tertiary, and benzylic alcohols with ZnO. This catalytic system was homogeneous because of high solubility of zinc oxide in the reaction medium.

    32. Environmentally Benign Regio- and Stereoselective Synthesis of Functionalized Tertiary Amines (pages 1253–1256)

      Rendong Wang, Jian Li, Chunju Li, Jun Liu, Dafeng Li, Xueshun Jia and Hongbin Zhai

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090217

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      The environmentally benign, regio- and stereoselective synthesis of functionalized tertiary amine 3 from acetates of Baylis-Hillman adducts with the aliphatic primary amines in the absence of any solvent and catalysts was reported.

    33. Synthesis and Bioactivity of Novel N,N′-Diacylhydrazine Derivatives Containing Furan (III) (pages 1257–1266)

      Zining Cui, Li Zhang, Juan Huang, Xinling Yang and Yun Ling

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090218

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      Based on our previous work, 42 novel N,N′-diacylhydrazine derivatives containing a furan ring were synthesized by the reaction of 5-substituted phenyl-2-furoyl chloride with substituted acylhydrazide in anhydrous dichloromethane under reflux. The structures of the target compounds were confirmed by IR, 1H NMR, MS and elemental analysis. The results of bioassay indicated that some of the target compounds exhibited good insecticidal and antitumor activity.

    34. Synthesis and Characterization of New Adhesion Promoter for Grafting Conducting Polymer on Oxide Substrate (pages 1272–1278)

      Xuediao Cai, Evelin Jaehne, Hans-Juergen Adler and Wenge Guo

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090220

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      For grafting polypyrrole layers on oxidic substrates, the synthesis and characterization of a new adhesion promoter 11-(pyrrol-3-yl) undecyl trimethoxysilane (PyTMS) were described in this article. The oxidation potential of PyTMS was determined by cyclic voltammetry. The grafting behavior of such an adhesion promoter on oxidized surface and chemical deposition of polypyrrole over the modified oxidized surface were studied. The adsorbed layer on the oxidized substrates thus formed was determined by both contact angle measurements and X-ray photoelectron spectroscopy. Chemical polymerization of terminal pyrrole moieties on such substrates yielded adhesive polypyrrole films, and SEM image showed that the morphology of the polypyrrole films was influenced by the experimental conditions.

    35. Synthesis, Photophysics and Morphology of a Conjugated Polymer with Azobenzene Building Block in the Backbone (pages 1279–1283)

      Dezhi Shen, Zhenxing Pan, Haibo Xu, Si Cheng, Xiulin Zhu and Lijuan Fan

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090221

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      A conjugate polymer containing azobenzene building block in the backbone exhibited good solubility in common organic solvents and broad absorbance in film.

    36. Considering Dependencies Amongst Genes Helps to Adjust the Significance Rank of DEGs (pages 1284–1290)

      Qi Liu, Guohui Ding, Tao Huang, Yejun Tan, Hongyue Dai, Lu Xie and Yixue Li

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090222

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      Considering the prior information of expression dependencies amongst genes helps to adjust the significance rank of genes and finds those truly differentially expressed genes.

    37. Photostability Study of Doxorubicin Aqueous Solution Enhanced by Inclusion Interaction between Doxorubicin and Hydroxypropyl-β-cyclodextrin (pages 1291–1295)

      Mingli Peng, Yanhong Liu, Hua Zhang, Yali Cui, Gaohong Zhai and Chao Chen

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090223

    38. Friction and Wear of Semi-Crystalline Polytetrafluoroethylene with Spherulitic Micro-Morphology (pages 1296–1300)

      Xiaoqun Wang, Zhenlu Zhao, Darong Chen and Shanyi Du

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090224

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      Friction and wear properties of PTFE with spherulitic micro-morphology are studied for the first time. The results show that, first, under the same experimental condition, when two kinds of PTFE are rubbed against the steel disc, the number and size of debris of spherulitic PTFE are much less and smaller than that of debris of PTFE without spherulitic crystals. This means that the wear resistance of spherulitic PTFE is better than that of semi-crystalline PTFE without spherulitic micro-morphology. Second, the friction property of spherulitic PTFE is also different from that of PTFE without spherulitic crystals. Finally, the friction and wear mechanisms of spherulitic PTFE and non-spherulitic PTFE are compared.

  2. Note

    1. Top of page
    2. Full Papers
    3. Note
    1. Synthesis of 3-Benzoyl Acrylates/Acrylamides via Dehydrogenation of 3-Benzoyl Propionates/Propionamides Using IBX/p-TsOH (pages 1301–1305)

      Ziyuan Li, Yiyun Wang, Changhua Tang, Jinyi Xu, Xiaoming Wu and Hequan Yao

      Article first published online: 2 AUG 2010 | DOI: 10.1002/cjoc.201090225

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      Dehydrogenation by IBX/p-TsOH is applied to the conversion of 3-benzoyl propionates/propionamides to 3-benzoyl acrylates/acrylamides in moderate to excellent yields. The reaction time for the dehydrogenation of 3-benzoyl propionamides was remarkably shorter than that for the dehydrogenation of esters.

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