中国化学快报

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A rapid and efficient method for the synthesis of 14H-dibenzo [α.j] xanthenes, aryl-5H-dibenzo [b.i]xanthene-5,7,12,14-(13H)-tetraone and 1,8-dioxooctahydroxanthenes by acidic ionic liquid

Abbas Rahmati

中国化学快报. 2010, 21(07): 761-764. https://doi.org/10.1016/j.cclet.2010.02.014

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Various xanthenes have been synthesized by the condensation of β-naphthol, 2-hydroxynaphthalene-1,4-dione or dimedone with various aldehydes in the presence of trifluoroacetic acid as catalyst in 1,1,3,3-N,N,N',N'-tetramethylguanidinium trifluoroacetate (TMGT) ionic liquid within 1h at 75℃.

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An efficient synthesis of ampicillin on magnetically separable immobilized penicillin G acylase

Ping Xue, Xiao Dan Song, Xue Rong Cao

中国化学快报. 2010, 21(07): 765-768. https://doi.org/10.1016/j.cclet.2010.02.015

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Penicillin G acylase (PGA) was immobilized on the magnetic hydrophilic polymer microspheres with average pore size of 17.1 nm, specific surface area of 128.2 m²/g and saturate magnetization of 6.4 emu/g. The 96.7% ampicillin yield with 1.60 of the synthesis/hydrolysis (S/H) ratio from 6-aminopenicillanic acid (6-APA) and D-(-)-alpha-phenylglycine methyl ester (D-PGME) can be achieved using the resultant magnetic biocatalyst in ethylene glycol, where only 82.1% yield with 1,40 of the S/H ratio was obtained using the free PGA under the identical reaction conditions. The immobilized PGA can be separated magnetically and recycled for five times without obvious loss of its catalytic activity.

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Synthesis, spectroscopic and electrochemical property of an unsymmetrical porphyrin and its Zn compound

Chang Fu Zhuang, Yu Jing Zhang, Ai Qing Xia, Wen Hui Lian, Yun Fang Wang, Ping Zhang, Tong Shun Shi

中国化学快报. 2010, 21(07): 769-773. https://doi.org/10.1016/j.cclet.2010.03.037

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In this article, a new 5-(p-maleicaminophenyl)-10,15,20-triphenylporphyrin (H₂P) and relative zinc compound (ZnP) were synthesized and characterized by means of elemental analyses, UV-vis, IR, MS and ¹H NMR spectroscopies. Furthermore, we have investigated the fluorescence spectroscopy of these compounds. The oxidation and reduction properties of the compounds were studied by the cyclic voltammetry, the oxidation-reduction potentials were obtained.

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Simply air:Vanadium-catalyzed oxidative kinetic resolution of methyl o-chloromandelate by ambient air

Lu Yin, Xian Jia, Xing Shu Li, Albert S. C. Chan

中国化学快报. 2010, 21(07): 774-777. https://doi.org/10.1016/j.cclet.2010.03.002

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Vanadium-catalyzed oxidative kinetic resolution (OKR) of methyl o-chloromandelate 2a, key intermediate of the well-known oral antiplatelet agent (S)-clopidogrel, was achieved by ambient air for the first time. The air oxidation system, which was composed of vanadium and tridentate Schiff base ligands derived from amino alcohols and salicylaldehyde derivatives, afforded an efficient and economic approach to the target intermediate with high enantioselectivities (> 99% ee).

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Highly efficient synthesis of 2,3-dihydroquinazolin-4 (1H)-ones catalyzed by heteropoly acids in water

YingXiao Zong, Yan Zhao, WenCai Luo, Xing Hai Yu, Jun Ke Wang, Yi Pan

中国化学快报. 2010, 21(07): 778-781. https://doi.org/10.1016/j.cclet.2010.03.022

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Heteropoly acids efficiently catalyzed the cyclocondensation reaction of anthranilamide with aldehydes in water at ambient temperature and afforded the corresponding 2,3-dihydro-4 (1H)-quinazolinones compounds in good to excellent yields. This method provides mild reaction conditions and clean reaction profiles, using a small quantity of catalyst and a simple workup procedure.

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A convenient synthesis of quinazoline derivatives via cascade imino-Diels-Alder and oxidation reaction

Xue Ming Chen, Hui Wei, Lu Yin, Xing Shu Li

中国化学快报. 2010, 21(07): 782-786. https://doi.org/10.1016/j.cclet.2010.03.003

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Quinazoline derivatives were synthesized from α-iminoesters via a cascade imino-Diels-Alder and then oxidation reaction catalyzed with CuBr₂. This method provided a new strategy for preparing quinazoline derivatives which may be useful in the synthesis of heterocyclic intermediates.

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Photochemical reaction of magnesium tetraphenyl porphyrin with sulfur dioxide

Jian Bin Zhang, Chun Ping Li, Tian Rui Huo, Zhan Ying Liu, Li Hua Liu, Tong Zhang, Dong Yan Zhang, Xiong Hui Wei

中国化学快报. 2010, 21(07): 787-789. https://doi.org/10.1016/j.cclet.2010.03.023

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The photochemical reaction of magnesium tetraphenyl porphyrin (MgTPP) with sulfur dioxide (SO₂) was investigated in dichloromethane (CH₂Cl₂) by steady-state fluorescence, UV-vis absorption, MS, and XRD spectroscopic techniques. These spectra showed that under irradiation MgTPP reacted with SO₂ to form 1:1 molecular adduct at first step. During the process of keeping irradiation and maintaining the flow of SO₂, SO₂ was reduced into S^2- by MgTPP and the results were detected using MS and XRD techniques. Understanding the photochemical reaction of MgTPP with SO₂ is of key interest in elucidating fundamental photochemical reaction mechanisms associated with this class of chlorophyll in the presence of SO₂.

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P₂O₅ mediated rapid condensation of 2-aminothiophenol with aromatic aldehydes at ambient temperature

Santosh V. Nalage, Sidhanath V. Bhosale, Dattatry S. Bhosale, Wamanrao N. Jadhav

中国化学快报. 2010, 21(07): 790-793. https://doi.org/10.1016/j.cclet.2010.03.006

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2-Arylbenzothiazoles formed in good yields (65-90%) by the condensation of aminothiophenols with aromatic aldehydes using P₂O₅ at ambient temperature.

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Carbamate synthesis from amines and dialkyl carbonate over inexpensive and clean acidic catalyst-Sulfamic acid

Bo Wang, Jing He, Run Cang Sun

中国化学快报. 2010, 21(07): 794-797. https://doi.org/10.1016/j.cclet.2010.03.012

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Sulfamic acid has been proved to be the most efficient and recyclable catalyst in carbamate synthesis from alkylamine and dialkyl carbonate. High selectivity, cost-efficiency and simple product separation were the advantageous features obtained in this process. Sulfamic acid could be reused several times and keep its initial activity in the recycle runs. In addition, sulfamic acid has also exhibited the potential catalytic ability for alkylation of aromatic amines.

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Stereoselective synthesis and crystal structure of 4,6-O-benzylidene-N-octyl-D-allosamine hydrochloride

Fu Yi Zhang, Chun Li Wu, Cui Zhang, Hong Min Liu

中国化学快报. 2010, 21(07): 798-801. https://doi.org/10.1016/j.cclet.2010.02.020

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The building block of N-alkyl derivative of allosamidin (chitinase inhibitor), 4,6-O-benzylidene-N-octyl-D-allosamine hydro-chloride was stereoselectively synthesized in two steps under mild conditions. Nucleophilic addition of octylamine to 2-oxoglucopyranoside gave a ‘carbonyl group transfer’ product in 62% yield. Subsequent stereoselective reduction of newly formed C=O with NaBH₄ produced title compound in 75% yield. X-ray diffraction analysis indicates the title compound adopts syn 1,2,3 stereochemistry and chair-chair conformation. The crystal structure is stabilized by hydrogen bonds.

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Enantioselective hydrogenation of acetophenone by (1S, 2S)-DPEN-Ru (Ⅱ) Cl₂ (PPh₃)₂ encapsulated in Al-MCM-41

Jian Hong Liu, Dong Liang, Bin Bin Fan, Rui Feng Li, Hua Chen

中国化学快报. 2010, 21(07): 802-806. https://doi.org/10.1016/j.cclet.2010.03.011

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A chiral ruthenium complex [(1S,2S)-DPEN]-RuCl₂ (PPh₃)₂ (DPEN=1,2-diphenylethylenediamine, PPh₃=triphenylphosph-ine) was encapsulated in the channel of Al-MCM-41 by electrostatic adsorption and 1,1-dichlorosilacyclobutane modification. The prepared heterogeneous catalyst showed the same catalytic activity and enantioselectivity as the corresponding homogeneous catalyst in the asymmetric hydrogenation of acetophenone, and could be reused at least seven times without significant loss of catalytic activity and enantioselectivity.

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Novel synthesis of N-substituted-calix [4]azacrown derivatives

Zhi Qiang Shi, Ya Qing Feng, Shu Xian Meng

中国化学快报. 2010, 21(07): 807-809. https://doi.org/10.1016/j.cclet.2010.02.023

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A novel series of calix [4]azacrown derivatives with the reaction between calix [4]azacrown and the different fluorophore derivatives, which may be useful fluorescent receptors, have been synthesized and structurally characterized by IR, ¹H NMR, ¹³C NMR and MS. From their analysis data, it was found those compounds adopted a cone conformation.

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The design and synthesis of a novel organophosphorus compound containing the structure of both β-amino acid and β-aminophosphonate

Han Bing Teng

中国化学快报. 2010, 21(07): 810-812. https://doi.org/10.1016/j.cclet.2010.03.035

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A novel organophosphorus compound containing the structure of both β-amino acid and B-aminophosphonate is designed and synthesized. Arbuzov reaction with P(OEt)₃, the N-Boc protected iodide 3 cannot provide the desired product but 2-oxazolidinone 4 because of the neighboring-group participation of the Boc moiety.To avoid the intramolecular participation of the carbamates, the Ts protecting group is employed and the Ts-protected iodide 5 affords the target product successfully.

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Synthesis of bisabolane sesquiterpenes:A Johnson-Claisen rearrangement approach

Zhen Ting Du, Hong Rui Yu, Yan Xu, Yong Li, An Pai Li

中国化学快报. 2010, 21(07): 813-815. https://doi.org/10.1016/j.cclet.2010.02.024

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sSeveral bisabolane sesquiterpenes, (±)-curcumene, (±)-curcuphenol, (±)-curcudiol and (±)-curcuhydroquinone, have been synthesized in racemic form and fully characterized. The salient characteristic of our approach is that a Johnson-Claisen arrangement was involved as a key step.

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A new phenanthraquinone from the roots of Peucedanum praeruptorum

Cun Zhang, Li Li, Yong Qing Xiao, Wen Li, Xiao Jie Yin, Guo Fang Tian, Dong Dong Chen, Yun Wang

中国化学快报. 2010, 21(07): 816-817. https://doi.org/10.1016/j.cclet.2010.03.020

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A new compound, 9,10-dihydrophenanthrinic acid, 9,10-dione-3,4-methylenedioxy-8-methoxy (1) was isolated from the roots of Peucedanum praeruptorum Dunn on the basis of spectral evidences.

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Two new chalcones from Fordia cauliflora

Zhi Yuan Liang, Xiao Sheng Yang, Ye Wang, Xiao Jiang Hao, Qian Yun Sun

中国化学快报. 2010, 21(07): 818-820. https://doi.org/10.1016/j.cclet.2010.03.021

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Two new chalcones, β,2',4',5'-tetramethoxychalcone 1, and β,2',5'-trimethoxyfurano [4",5":3',4']-chalcone 2 were obtained from an ethyl acetate-soluble fraction of ethanol extract of the stem of Fordia cauliflora. Their chemical structures were determined by analysis of spectroscopic evidences.

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A new alkylene dihydrofuran glycoside with antioxidation activity from the root bark of Morus alba L.

Wei Fu, Yong Fang Lei, Ya Ling Cai, Dao Nian Zhou, Jin Lan Ruan

中国化学快报. 2010, 21(07): 821-823. https://doi.org/10.1016/j.cclet.2010.02.016

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A new alkylene dihydrofuran glycoside (1) was isolated from the root bark of Morus alba L., along with moracin M-3'-O-β-D-glucopyranoside (2), and moracin M-6,3'-di-O-β-D-glucopyranoside (3). Compound 1 was identified as 2-methylene-3-methoxy-2, 5-dihydrofuran-4-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data including ID and 2D NMR spectral analysis. In addition, the antioxidant activity of 1 was evaluated using the l,l-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) assay. The IC₅₀ values were 2.49 and 0.45 mg/mL, respectively.

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Three new aspochalasin derivatives from the marine-derived fungus Spicaria elegans

Zhen Jian Lin, Tian Jiao Zhu, Li Chen, Qian Qun Gu

中国化学快报. 2010, 21(07): 824-826. https://doi.org/10.1016/j.cclet.2010.02.019

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Three new aspochalsins (R-T) (1-3) were isolated from the marine-derived fungus Spicaria elegans. Their structures were elucidated on the basis of comprehensive spectral analysis including 1D and 2D NMR techniques, and HR-ESI-MS.

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Two new terpenes from Tripterygium wilfordii

Bo Le Li, Qian Shen, Mei Na Jin, Hong Quan Duan

中国化学快报. 2010, 21(07): 827-829. https://doi.org/10.1016/j.cclet.2010.03.007

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Two new terpenes,wilfornine H (1)and triptobenzene Q (2)were isolated from Tripterygium wilfordii,as well as 11 terpenes.Their structures were elucidated by spectroscopic methods.Compounds 5,9-13 shewed significant immunosuppressive activities.

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Three new sesquiterpene alkaloids from the root of Tripterygium wilfordii

Chun Min Wu, Lin Mei Zhou, Yi Feng Chai, Yu Tian Wu, Guo Rong Fan

中国化学快报. 2010, 21(07): 830-833. https://doi.org/10.1016/j.cclet.2010.02.021

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Three new sesquiterpene alkaloids,1-desaeetylwilforgine (1),1-desaeetylwilforine (2),and 9'-hydroxy-2-nicotinoylwilforine (3)were isolated from the roots of Tripterygium wilfordii Hook f.,along with six known alkaloids.Their structures were established on the basis of spectral analysis.

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A new derivative of triterpene with anti-melanoma B16 activity from Conyza canadensis

Ming Ming Yan, Ting You Li, Da Qing Zhao, Shuai Shao, Sheng Nan Bi

中国化学快报. 2010, 21(07): 834-837. https://doi.org/10.1016/j.cclet.2010.02.022

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A new derivative of triterpene named Erigeronol 1 was isolated from the EtOH extract of the aerial part of Conyza canadensis together with 15 known compounds for the first time from this plant.The structure of Erigeronol 1 was elucidated as 3-O-(hydroxyacetyl)-23,28-dihydroxy-β-amyrin by hydrolysis and spectroscopic analysis.Erigeronol 1 showed potent cytotoxic activity with IC₅₀ value of 7.77±0.47 μg/mL against melanoma B16 determined by the 3-(4,5-dimethylthiazo-2-yl)-2,5-dipbenyltetrazolium bromide(MTT)method.

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New limonoids from the fruits of Melia toosendan

Qiong Zhang, Jing Yu Liang, Qing Shan Li, Zhi Da Min

中国化学快报. 2010, 21(07): 838-841. https://doi.org/10.1016/j.cclet.2010.02.018

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Two new limonoids,1α-tigloyloxy-3α-acetoxyl-7α-hydroxyl-12α-ethoxyl nimbolinin (1)and 1α-benzoyloxy-3α-acetoxyl-7α-hydroxyl-12α-ethoxyl nimbolinin (2),were isolated from the fruits of Melia toosendan.Their structures were established on the basis of various NMR spectroscopic analyses,including 2D-NMR techniques (HSQC,HMBC,NOESY)and HR-ESI-MS.

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Three antibacterial naphthoquinone analogues from cultured mycobiont of lichen Astrothelium sp

Li Yan Sun, Zhen Liang Liu, Tao Zhang, Shu Bin Niu, Zun Tian Zhao

中国化学快报. 2010, 21(07): 842-845. https://doi.org/10.1016/j.cclet.2010.03.024

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A new naphthoquinone compound named 7-hydroxyl-8-methoxyltrypethelone 3 together with two known compounds trypethelone 1 and trypethelone methyl ether 2 was isolated from cultured mycobiunt of Astrothelium sp.The structures were elucidated by 1D and 2D NMR spectroscopic analysis as well as comparison with those reported in literatures.Compound 1 displayed significant antibacterial activity against Bacillus subtilis (ATCC 6633),and showed modest antibacterial activity against Staphylococcus aureus col (MRSA) (CGMCC 1.2465),while compounds 2 and 3 showed modest antibacterial activity against Enterococcus faecalis 850E (CGMCC 1.2135)and S.aureus col (MRSA) (CGMCC 1.2465).

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Two new 5α-adynerin-type compounds from Parepigynum funingense

Yan Hua, Hai Yang Liu, Wei Ni, Chang Xiang Chen

中国化学快报. 2010, 21(07): 846-849. https://doi.org/10.1016/j.cclet.2010.03.034

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A new 5α-adynerin-type cardenolide,named funingenoside U (1),together with its aglycone,(17R)-3β-hydroxy-4β-acetoxy-8,14β-epoxy-5α-card-20 (22)-enolide,was isolated from the roots of Parepigynum funingense.Their structures were established on the basis of spectral (MS,1D and 2D NMR) measurements and chemical evidences.

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A new polyacetylene glycoside from the rhizomes of Atractylodes lancea

Ying Ji, Xu Feng, Chao Cheng Xiao, Yun Fa Dong, Qi Zhi Wang, Ming Wang, You Yi Zhao

中国化学快报. 2010, 21(07): 850-852. https://doi.org/10.1016/j.cclet.2010.03.026

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A new polyacetylene glycoside, (1,3Z,11E)-tridecatriene-7,9-diyne-5-hydroxyl-6-O-β-D-glucopyranoside,was isolated from the rhizomes of Atractylodes lancea (Thunb.)DC.Its structure was elucidated on the basis of spectral analysis.

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¹H NMR analysis of the tolylene-2,4-diisocyanate-methanol reaction

Peng Fei Yang, Yong De Han, Tian Duo Li, Jun Ying Li

中国化学快报. 2010, 21(07): 853-855. https://doi.org/10.1016/j.cclet.2010.02.017

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Tolylene-2,4-diisocyanate (2,4-TDI)1 reacts with methanol through two simultaneous paths in the polyurethane reaction,which involve two different intermediates-tolylene-4-caxbamatic-2-isocyanate 2 and tolylene-2-carbamatic-4-isocyanate 3,and the final product is tolylene-2,4-dicarbamate 4.The-CH₃ chemical shifts in benzene ring in compounds 1,2,3 and 4 can be easily tested and well distinguished,through which those four compounds are quantified and their kinetics are investigated.It shows that four rate constants for the tolylene-2,4-diisocyanate-methanol reaction in CCl₄ at 50℃ are k₁=9.6×10^-2h^-2mol^-2min^-1,k₂=1.4×10^-2h^-2mol^-2min^-l,k₃=4.0×10^-3h^-2mol^-2min^-1,k₄=1.4×10^-3h^-2mol^-2min^-1.(k₁ is the reaction rate constant from compounds 1 to 2; k₂ is the reaction rate constant from compounds 1 to 3; k₃ is the reaction rate constant from compounds 3 to 4; k₄ is the reaction rate constant from compounds 2 to 4).

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Chemiluminescence determination of 20 amino acids and the mechanism study

Yan Ming Liu, Zhuan Li Liu

中国化学快报. 2010, 21(07): 856-859. https://doi.org/10.1016/j.cclet.2010.01.025

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It was found that 20 amino acids could inhibit the intensity of the luminol-H₂O₂-CuSO₄ chemiluminescence system.Using this character,a rapid and sensitive method for the determination of 20 amino acids was developed with flow injection coupled with chemiluminescence detection.Under the optimal conditions,the detection limits of 20 amino acids were in the range of 4.5×10^-7-4.3×10^-10 mol/L,and the relative standard deviations were less than 3.2%.The proposed method was successfully applied to drug analysis.The possible mechanism was also discussed.

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High performance liquid chromatographic separation of clausenamide enantiomers with chiral-AGP stationary phase

Yan Wang, Qing Qiang Yao, Mu Zou Wang

中国化学快报. 2010, 21(07): 860-863. https://doi.org/10.1016/j.cclet.2010.01.024

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A method of high performance liquid chromatographic separation of clausenamide enantiomers with chiral-AGP (α₁-acid glycoprotein)stationary phases has been established.The absolute configurations of (-)clausenamide and (+)clausenamide are 3S,4R,5R,6S and 3R,4S,5S,6R,respectively.The present method has been used to analyze the (-) clausenamide and (+) clausenamide and its analogues such as the major metabolite and synthetic derivatives of clansenamide.

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Fabrication of triple-shelled hollow spheres with optical properties via RAFT polymerization

Li Ping Wang, Li Min Zhao, Wen Zhi Li, Rui Qing Chu, Long Tan, Xiu Xiu Zhao, Gang Wang

中国化学快报. 2010, 21(07): 864-867. https://doi.org/10.1016/j.cclet.2010.01.039

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The triple-shelled hollow spheres with optical properties were prepared via reversible addition-fragmentation chain transfer (RAFT)polymerization.After removal the core templates of the poly (styrene),the hollow silica spheres were obtained.The coating process of poly (methyl methacrylate) (PMMA)on the hollow silica spheres surface via surface RAFT polymerization was performed subsequently.The polymers coated on the hollow spheres surfaces were end-functionalized by trithiocarbonate,and they were used as RAFT agent to proceed the chain extension polymerization using Tb complex as monomer.The samples were characterized by FT-IR,SEM and luminescence spectroscopy respectively.The results indicated that the triple-shelled hollow spheres had been prepared successfully and the average diameter of the hollow core was about 1 μm.

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Synthesis of benzoxazine-based phenolic resin containing furan groups

Sheng Fang Li

中国化学快报. 2010, 21(07): 868-871. https://doi.org/10.1016/j.cclet.2010.01.007

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A novel benzoxazine-based phenolic resin containing furan groups (PFB)was synthesized via simple two-step reactions and the structure of PFB was confirmed by FTIR and ¹H NMR spectra.Differential scanning calorimetry (DSC)showed that the polybenzoxazine cured from PFB had good heat resistance and lower polymerization temperature compared with that of benzoxazine-hased phenolic resins.

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Ionic liquid-assisted synthesis of silver nanorods by polyol reduction

Hong Ying Wang, Yan An Gao, Ming Wei Zhao, Li Qiang Zheng

中国化学快报. 2010, 21(07): 872-875. https://doi.org/10.1016/j.cclet.2010.01.036

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Silver nanorods have been successfully synthesized in large scale by the ethylene glycol (EG) reduction in the presence of ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF₄) and polyvinyl-pyrrolidone (PVP).The silver nanorods were characterized by scanning electron microscopy (SEM),high-resolution transmission electron microscopy (HRTEM),transmission electron microscopy (TEM),electron energy disperse spectroscopy (EDS) and UV-vis spectroscopy.The results showed that the uniform silver nanorods have an average diameter of about 100 nm and the aspect ratio from 15 to 20.IL,bmimBF₄ may play a role of capping agent together with PVP in the formation of silver nanorods.On the other hand,bmimBF₄ may accelerate nucleation and improve the stability of the resulting Ag nanorods due to the low interface tension of IL.

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Layer-by-layer electrostatic selfassembly of anionic and cationic carbon nanotubes

Yu Jun Qin, You You Wang, Ming Xue Tang, Zhi Xin Guo

中国化学快报. 2010, 21(07): 876-879. https://doi.org/10.1016/j.cclet.2010.02.003

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The layer-by-layer (LBL) selfassembly of anionic and cationic multi-walled carbon nanotubes (MWNTs) through electrostatic interaction has been carried out to fabricate all-MWNT multilayer films.The alternate uniform assembly of anionic and cationic MWNTs was investigated by UV-vis spectroscopy.Scanning electron microscopy (SEM) images displayed the growth of the MWNT films.

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Surfactant-free oil/water and bicontinuous microemulsion composed of benzene,ethanol and water

Fei Song, Jie Xu, Wan Guo Hou

中国化学快报. 2010, 21(07): 880-883. https://doi.org/10.1016/j.cclet.2010.01.029

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Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel surfactantfree microemulsion (denoted as SFME) composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional surfactant.The phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase diagram.The electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water (O/W) microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy (FF-TEM) observations.The sizes of the microemulsion droplets are in the range of 20-50 nm.

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Preparation of polypyrrole/polyvinylalcohol (PPy/PVA)composite foam electrode material

Xin Yi Wang, Li Ping Heng, Nai Liang Yang, Qiang Xie, Jin Zhai

中国化学快报. 2010, 21(07): 884-887. https://doi.org/10.1016/j.cclet.2010.01.005

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Polypyrrole/polyvinylalcohol (PPy/PVA) foam was prepared by direct foam polymerization in water and then it was coated on the indium-tin oxide transparent conductive glass (ITO) to form conventional three-electrode cell.FTIR and UV-vis spectra were adopted to characterize the molecular structure and the absorption spectra of foam material,respectively.The porous structure of PPy/PVA foams and their photoelectric conversion behaviors were studied.The dimension of the pores is bigger than 100 μm in diameter.Compared with the smooth film,the V_oc and I_sc of the foam film enhanced by 1.58-fold and 5.59-fold,respectively.

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2010年, 第21卷, 第07期　刊出日期：2010-07-20

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2010年, 第21卷, 第07期 刊出日期：2010-07-20

2010年, 第21卷, 第07期　刊出日期：2010-07-20