中国化学快报

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Synthesis analogues of milbemycin and their bioactivity evaluation

Jin Hao Zhao, Ming Hua Ji, Xu Hui Xu, Jing Li Cheng, Guo Nian Zhu

中国化学快报. 2010, 21(12): 1391-1394. https://doi.org/10.1016/j.cclet.2010.06.035

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Eight new 13-O-aminocarbonylivermectin aglycones and 4'-O-aminocarbonylivermectin monosaccharide were synthesized from ivermectin aglycone and ivermectin monosaccharide by the selective protection of C₅-OH group. Their bioactivities were evaluated against spicier mites (Tetranychus cinnabarinus), aphid (Aphis fabae) and orlental armyworm (Mythimma sepatara). Their structures were confirmed by ¹H NMR. MS.

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Silica gel supported AlCl₃ catalyzed Friedel-Crafts acylation of aromatic compounds

Kaveh Parvanak Boroujeni

中国化学快报. 2010, 21(12): 1395-1398. https://doi.org/10.1016/j.cclet.2010.07.024

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Silica gel supported alumirtium trichloride (SiO₂-AlCl₃) has been shown to be a mild, efficient, and chemoselective heterogeneous Lewis acid catalyst for the acylation of aromatic compounds with acid chlorides. The catalyst can be reused up to five times after simple washing with ether and is stable (as a bench top catalyst).

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An efficient fluorination of β-ketosulfones promoted by a room-temperature ionic liquid at ambient conditions under ultrasound irradiation using Selectfluor^TM F-TEDA-BF₄

Mohammad Reza Poor Heravi

中国化学快报. 2010, 21(12): 1399-1402. https://doi.org/10.1016/j.cclet.2010.06.030

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The fluorination reaction involving a β-ketosulfones by Selectfluor^TM was efficiently promoted by the ionic liquid,[Hbim]BF₄ (IL) as a reaction medium with methanol as co-solvent at room temperature under ultrasonic irradiation to afford the corresponding mono and difluoro-β-ketosulfones in excellent yields. The advantages of this method include among others the use of a recyclable, non-volatile ionic liquid, which promotes this protocol under room temperature without the requirement of any added catalyst under ultrasonic irradiation.

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Asymmetric hydrogenation of aromatic ketones using new chiral-bridged diphosphine/diamine-Ru (Ⅱ) complexes

Yu Ming Cui, Lai Lai Wang, Fuk Yee Kwong, Wei Sun

中国化学快报. 2010, 21(12): 1403-1406. https://doi.org/10.1016/j.cclet.2010.05.027

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A series of chiral secondary alcohols were easily prepared by means of asymmetric hydrogenation of prochiral aromatic ketones using a new ((R_ax)-BuP)/(R, R)-DPEN-Ru (Ⅱ) complex catalyst system. The hydrogenation of 2-methylacetophenone in n-butanol (t-BuOK/Ru=45.6/1, S/C=500, 20 atm. Of H₂, 20℃, 48h) afforded (S)-1-(2'-methylphenyl) ethanol in 92% ee and>99% conversion.

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Design,synthesis and anti-proliferative studies of a novel series of indirubin derivatives

Tian Cai Wang, Ju Zhi Wei, Chuan Sheng Guo, Hui Bin Zhang, Hou Xing Fan

中国化学快报. 2010, 21(12): 1407-1410. https://doi.org/10.1016/j.cclet.2010.05.026

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A series of novel derivatives of indirubin were synthesized and evaluated for their anti-proliferative activity against human cancer cell lines of SGC7901, A549, HL-60, SK-BR-3 and HCT116. Most of the compounds displayed more potent activity than Sunitinib. In addition, the derivatives showed improved water solubility, which may be favorable to their pharmacokinetic performances.

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A ligand-free Heck reaction catalyzed by the in situ-generated palladium nanoparticles in PEG-400

Wei Han, Ning Liu, Chun Liu, Zi Lin Jin

中国化学快报. 2010, 21(12): 1411-1414. https://doi.org/10.1016/j.cclet.2010.06.019

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A ligand-free Heck reaction catalyzed by in situ-generated palladium nanoparticles in PEG-400 has been developed. This catalytic system is a simple and active protocol for the Heck reaction of aryl halides under mild conditions. Comparative experiments demonstrated that the Heck reaction catalyzed by the palladium nanoparticles in situ-generated under the Heck reaction conditions was carried out much quicker than that by the in ex situ-generated ones.

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Synthesis and biological evaluation of novel N-(alkoxyphenyl)-aminocarbonylbenzoic acid derivatives as PTP1B inhibitors

Yuan Feng Tong, Pei Zhang, Feng Chen, Ling Hua Hao, Fei Ye, Jin Ying Tian, Song Wu

中国化学快报. 2010, 21(12): 1415-1418. https://doi.org/10.1016/j.cclet.2010.07.005

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Based on the fact that petroselinic acid showed good inhibitory activity (IC₅₀=6.99 μmol/L) against protein tyrosine phophatase 1B (PTP1B) in vitro, a series of novel N-(alkoxyphenyl)-aminocarbonylbenzoic acid derivatives were designed and synthesized. The results indicated that most of the derivatives showed more potent activities against PTP1B. Especially, compound 13 had obvious activity with an IC₅₀ of 106 nmol/L in vitro.

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Facile synthesis of[1,2,4]triazino[4,3-b][1,2,4,5]tetrazepin derivatives by a one-pot reactions using 4-amino-3-hydrazinyl-6-methyl-1,2,4-triazin-5(4H)-one

Hooshang Vahedi, Ghadir Rajabzadeh, Fahimeh Farvandi

中国化学快报. 2010, 21(12): 1419-1422. https://doi.org/10.1016/j.cclet.2010.07.006

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4-Amino-3-mercapto-6-methyl-1, 2, 4-triazin-5 (4H)-one 1 converted to 4-amino-6-methy-3-(methylthio)-l, 2, 4-triazin-5 (4H)-one by methylation with methyl iodide. Controlled hydrazination of the resulting compound afforded 4-amino-3-hydrazinyl-6-methyl-l, 2, 4-triazin-5 (4H)-one 2 as a building block, to the synthesis of some novel derivatives of[1, 2, 4]triazino-[4, 3, b] [1, 2, 4, 5]tetrazepine 3-6, by the reaction with 3-chloropentane-2, 4-dione, chloro acetonitrile, 1, 3-dichloroacetone, and methyl bromoacetate. This general synthetic procedure can be extended to the preparation of wide variety of tetrazepines using 1, 2-bielectrophiles derivatives.

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Efficient one-pot synthesis of 1,3-diaryl-3H-benzo[f]chromenes using ferric hydrogensulfate

Hossein Eshghi, Gholam Hossein Zohuri, Saman Damavandi, Mohammad Vakili

中国化学快报. 2010, 21(12): 1423-1426. https://doi.org/10.1016/j.cclet.2010.07.007

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An efficient and easy method for one-pot three-component synthesis of l, 3-disubstituted-3H-benzo[f]chromenes by the condensation of naphtol, aromatic aldehyde derivatives and phenylacetylene in the presence of ferric hydrogensulfate[Fe (HSO₄)₃], has been described. The catalyst displayed high activity which afforded the corresponding l, 3-disubstituted-3H-benzo[f]chromenes in satisfying yields. Alkyl-substituted phenols were examined and the corresponding benzopyran derivatives were synthesized in moderate yields. Heterogeneous nature of the using catalyst made it reusable for further chemical reactions.

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Synthesis and biological evaluation of lipid-soluble prodrugs of anethole dithiolthione

Mei Guan, Wei Fan, Shan Qian, Rui Qi Xiao, Yong Wu

中国化学快报. 2010, 21(12): 1427-1429. https://doi.org/10.1016/j.cclet.2010.07.014

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16 ADT carboxylate esters were prepared by means of esterification and these compounds were expected to increase the bioavailability of 4-hydroxyanehole trithione. In vivo studies showed that ADT concentration of 3a in plasma was much higher than that of ATT during 120 min. Compound 3a could reach blood peak values of ADT at 660.6 ng/mL which was about 14 times of that by ATT. Additionally, the acute toxicity assay indicated high safety of compound 3a that the maximum tolerated dose was no less than 3.25 g/kg.

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p-Toluenesulfonyl chloride as a new and effective catalyst for acetylation and formylation of hydroxyl compounds under mild conditions

Ardeshir Khazaei, Amin Rostami, Fatemeh Mantashlo

中国化学快报. 2010, 21(12): 1430-1434. https://doi.org/10.1016/j.cclet.2010.05.025

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The catalytic application of p-toluenesulfonyl chloride for efficient acetylation of various types of alcohols and phenols with acetic anhydride in solvent-free conditions is reported. Also structurally diverse alcohols were formylated using formic acid based on the use of catalytic amount of p-toluenesulfonyl chloride under solvent-free condition. The reactions were carried out in short reaction time and in good to excellent yields at room temperature.

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One-pot synthesis of 7-aryl-11,12-dihydrobenzo[h]pyrimido-[4,5-b]quinoline-8,10(7H,9H)-diones via three-component reaction in ionic liquid

Hong Yun Guo, Yi Yu

中国化学快报. 2010, 21(12): 1435-1438. https://doi.org/10.1016/j.cclet.2010.07.017

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A series of new 7-aryl-11, 12-dihydrobenzo[h]pyrimido-[4, 5-b]quinoline-8, 10(7H, 9H)-diones were synthesized via three-component reaction of aldehydes, 1-naphthylamine and barbituric acid in ionic liquid. The method provided several advantages such as easy work-up, high yields and environmentally benign procedure.

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An efficient synthesis of benzofuran derivatives under conventional/non-conventional method

Suryakant B. Sapkal, Kiran F. Shelke, Bapurao B. Shingate, Murlidhar S. Shingare

中国化学快报. 2010, 21(12): 1439-1442. https://doi.org/10.1016/j.cclet.2010.06.038

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1-Methyl-3-ethyl imidazolium bromide[meim]Br/basic alumina (AI₂O₃) has been found to promote the cyclocondensation of chloroacetone/chloroethyl acetate with salicylaldehydes under conventional as well as microwave irradiation to yield benzofuran derivatives.

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A new flavone C-glucoside from Glycosmis arborea (Rutaceae)

Rajni Kant Sharma, Sushma Semwal, Devendra Singh Negi

中国化学快报. 2010, 21(12): 1443-1445. https://doi.org/10.1016/j.cclet.2010.06.024

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A new C-glycosyl flavone 7, 4'-dihydroxy-5-methoxyflavone-6-C-β-D-glucopyranoside 1 has been isolated and characterized form ethanolic extract of leaves part of Glycosmis arborea. The structure of compound was verified by means of high field ID and 2D NMR (DEPT, COSY, DQF-HSQC, HMBC) and HRMS spectral analysis, respectively.

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A new isoquinoline derivative from the leaves of Magnolia sieboldii K.Koch

Di Wu, Ru Ping Wang, Shao Jiang Song, Li Jun Wu, Hui Yuan Gao

中国化学快报. 2010, 21(12): 1446-1448. https://doi.org/10.1016/j.cclet.2010.07.018

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Magnoline (1), a new isoquinoline derivative, was isolated from the leaves of Magnolia sieboldii K. Koch (Magnoliaceae). Its structure was elucidated on the basis of spectral analysis including ID, 2D NMR and HR-TOF-MS.

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Cocos nucifera L.water as green corrosion inhibitor for acid corrosion of aluminium in HCl solution

Olusegun K. Abiola, Y. Tobun

中国化学快报. 2010, 21(12): 1449-1452. https://doi.org/10.1016/j.cclet.2010.07.008

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The ability of Cocos nucifera L. water (CW) as non-toxic corrosion inhibitor for acid corrosion of aluminium in 0.5 mol/L HCl has been studied using chemical technique. CW shows significant inhibition as corrosion inhibitor, with 93% efficiency at the highest concentration of the inhibitor. The inhibitive action is attributed to the adsorption of the inhibitor molecules on metal surface following Langmuir adsorption isotherm.

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Optimization by orthogonal array design of ion-pair HPLC separation of the enzymatic hydrolysis products of yeast RNA

Jie Hua, Ke Long Huang

中国化学快报. 2010, 21(12): 1453-1456. https://doi.org/10.1016/j.cclet.2010.07.002

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The separation of enzymatic hydrolysis products of yeast RNA by ion-pair HPLC was studied. A modified chromatographic response function (MCRF) was proposed to appraise the effectiveness of chromatographic separation. This function takes the number of peaks, resolution and the retention time of the last peak into consideration. It shows advantages for optimization of HPLC separation of complex mixtures. An orthogonal array design was used to separate the hydrolysate of yeast RNA and the optimal chromatographic conditions were obtained.

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Determination of sulfite in water samples by flow injection analysis with fluorescence detection

Li Qian Yin, Dong Xing Yuan, Min Zhang

中国化学快报. 2010, 21(12): 1457-1461. https://doi.org/10.1016/j.cclet.2010.06.029

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A fast, sensitive, and reliable method for the determination of sulfite (SO₃^2-) in fresh water and seawater samples was developed. The proposed method was based on the reaction of o-phthalaldehyde (OPA)-sulfite-NH₃ in alkaline solution, with flow injection analysis and fluorescence detection. The experimental parameters were investigated in pure water and seawater matrixes. The detection limits (S/N=3) were 0.006 μmol/L in pure water and 0.018 μmol/L in seawater for SO₃^2-. The method was successfully applied to analyze SO₃^2-in the samples of rain water and flue gas desulfurization seawater.

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Electrocatalytic oxidation of thiosulfate at 2,7-bis (ferrocenylethyl)-fluoren-9-one-modified carbon paste electrode (2,7-BFEFMCPE):Application to the catalytic determination of thiosulfate in real sample

Jahan Bakhsh Raoof, Reza Ojani, Hassan Karimi-Maleh

中国化学快报. 2010, 21(12): 1462-1466. https://doi.org/10.1016/j.cclet.2010.06.004

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Electrocatalytic oxidation of thiosulfate at the 2, 7-BFEFMCPE occurs at a potential about 460 mV less positive than that unmodified carbon paste electrode. The diffusion coefficient (=5.6×10^-5 cm² s^-1), the kinetic parameters such as electron transfer coefficient, (=0.5) and k_h (=1.21×10^-3 cm s^-1) of thiosulfate oxidation at the surface of, 2, 7-BFEFMCPE were determined. The electrocatalytic oxidation peak current of thiosulfate showed two linear dynamic ranges (0.00 (0-0.009 mmol/L and 0.009-0.900 mmol/L) and a detection limit of 0.00015 mmol/L. This method was also examined as a new electrochemical sensor for the determination of thiosulfate in real sample.

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Determination of captopril in patient human urine using ferrocenemonocarboxylic acid modified carbon nanotubes paste electrode

Mohammad A. Khalilzadeh, Hassan Karimi-Maleh, Azra Amiri, Fathali Gholami, Robabeh Motaghed mazhabi

中国化学快报. 2010, 21(12): 1467-1470. https://doi.org/10.1016/j.cclet.2010.06.020

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In this work. we describe a new strategy for the electrochemical determination of captopril (CA) using ferrocenemonocarboxylic acid as a mediator and muhiwall carbon nanotubes as sensors in aqueous solution at pH 7.0. The diffusion coefficient (D), and the kinetic parameters such as electron transfer coefficient (α), and heterogeneous rate constant (k_h), for CA were also determined using electrochemical approaches. Under the optimized conditions, the electrocatalytic oxidation peak current of captopril showed. two linear dynamic ranges with a detection limit of 0.3×10^-6 mol L^-1 captopril. The linear calibration range was 0.8×10^-6 to 65×10^-6 mol L^-1 using cyclic voltammetry. Finally, this modified electrode was also examined as a selective, simple and precise new electrochemical sensor for the determination of captopril in real samples such as drug and patient human urine.

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Electrochemical determination of vitamin C in the presence of uric acid by a novel TiO₂ nanoparticles modified carbon paste electrode

Mohammad Mazloum-Ardakani, Mohammad Ali Sheikh-Mohseni, Hadi Beitollahi, Ali Benvidi, Hossein Naeimi

中国化学快报. 2010, 21(12): 1471-1474. https://doi.org/10.1016/j.cclet.2010.07.026

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The electrochemical behavior of vitamin C (ascorbic acid or AA) is investigated on the surface of a carbon-paste electrode modified with TiO₂ nanoparticles and 2, 2'-(1, 2 butanediylbis (nitriloethylidyne))-bis-hydroquinone (BBNBH). The prepared modified electrode showed an efficient catalytic role in the electrochemical oxidation of AA, leading to remarkable decrease in oxidation overpotential and enhancement of the kinetics of the electrode reaction. This modified electrode exhibits well-separated oxidation peaks for AA and uric acid (UA). The modified electrode is successfully applied for the accurate determination of AA in pharmaceutical preparations.

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Retention behaviors of novel ionic liquid stationary phases and their selectivity for capillary gas chromatography

Kai Lu, Wei Liu, Mei Ling Qi, Ruo Nong Fu

中国化学快报. 2010, 21(12): 1475-1478. https://doi.org/10.1016/j.cclet.2010.06.039

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One chloride-terminated ionic liquid (CTIL) and two hydroxyl-terminated ionic liquids (HTILs) were synthesized and used as stationary phases for capillary gas chromatography (CGC). Molecular interactions of these stationary phases were evaluated by Abraham solvation parameter model, indicating that the CTIL exhibits remarkably strong H-bond basicity and the HTILs possess both H-bond basicity and acidity. The molecular interactions were further confirmed by separation of a complex mixture consisting of ketones, aldehydes, esters, alcohols and aromatic compounds. It was found that the obtained solvation parameters correlate well with the chromatographic performances of the analytes in terms of elution order and resolution. The well correlated relationship between the solvation parameters and the selectivity of the CTIL and HTILs stationary phases is quite helpful in predicting and understanding the retention behaviors of different types of analytes on these stationary phases.

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Isolation of lignosulfonate with low polydispersity index

Xin Ping Ouyang, Pan Zhang, Chun Mei Tan, Yong Hong Deng, Dong Jie Yang, Xue Qing Qiu

中国化学快报. 2010, 21(12): 1479-1481. https://doi.org/10.1016/j.cclet.2010.06.032

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Lignosulfonate with low polydispersity index of 1.178-1.210 was isolated by gel column chromatography of Sephacryl S-100eluted with 0.2 mol/L of NaNO₃ aqueous solution, whereas nearly monodisperse ligosulfonate fraction with polydispersity of 1.067can be obtained after chromatographic separation twice. This method provides an available approach to investigate the structure and characteristics of lignosulfonate.

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Highly sensitive fluorescence quantification of irinotecan in biological fluids with the aid of second-order advantage

Hai Yan Fu, Hai Long Wu, Jin Fang Nie, Yong Jie Yu, Hong Yan Zou, Ru Qin Yu

中国化学快报. 2010, 21(12): 1482-1486. https://doi.org/10.1016/j.cclet.2010.06.040

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A rapid, green and highly sensitive excitation-emission matrix (EEM) fluorescence method was proposed for analysis of irinotecan (CPT-11) in biological fluids including human plasma and urine samples of uncalibrated interferences with the aid of second-order advantage. Due to the serious spectral overlapping from biological matrices, the parallel factor analysis (PARAFAC) and the alternating normalization-weighted error (ANWE) have been recommended to perform directly calibration and overcome the problem which makes the traditional fluorospectrophotometer in trouble. Satisfactory results can be achieved. Furthermore, performance of the proposed method was evaluated based on figures of merit and some statistical parameters. The accuracy of both algorithms was validated by the elliptical joint confidence region (EJCR) test. The precision and repeatability were also investigated by the relative standard deviations (RSDs) of intra-day and inter-day.

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Polyacrylamide hydrogels with phenylboronic acid moieties for the imprinting of proteins

Yan Wang, Zhi Hua Chai, Hong Yan He, Yi Zhe Jiang, Guo Qi Fu

中国化学快报. 2010, 21(12): 1487-1489. https://doi.org/10.1016/j.cclet.2010.06.005

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In this letter, N-acryloyl-3-aminophenylboronic acid (AAPBA) was synthesized and then examined as a new functional monomer for protein imprinting. It was allowed to be copolymerized with acrylamide to produce hemoglobin-or lysozyme-imprinted hydrogels. In template rebinding tests, the imprinted gels showed significant increase in the specific binding with the increase of the AAPBA amounts in the prepolymerization recipes. These results indicate that AAPBA may be a useful functional monomer for its moderate interactions with protein molecules.

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Poly (amaranth) film based sensor for resolution of dopamine in the presence of uric acid:A voltammetric study

Umesh Chandra, B. E. Kumara Swamy, Ongera Gilbert, M. Pandurangachar, Sathish Reddy, S. Sharath Shankar, B. S. Sherigara

中国化学快报. 2010, 21(12): 1490-1492. https://doi.org/10.1016/j.cclet.2010.07.016

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The electropolymerized film of amaranth was prepared on the surface of graphite pencil electrode (GPE) using cyclic voltammetric technique. This poly (amaranth) film coated electrode exhibited an excellent electrocatalytic activity towards the detection of dopamine (DA) in the presence of uric acid (UA) in 0.2 mol/L phosphate buffer solution at pH 7.0. The effect of interference study was carried out using differential pulse voltammetric technique. The poly (amaranth) modified GPE was applied for the detection of DA in dopamine injection with satisfactory results.

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Three-dimensionally ordered macroporous cross-linked polystyrene incorporating functional group via hydrophilic spacer arm

Li Xia Yuan, Xiao Mei Wang, Xu Zhang, Pan Ge Liu, Wei Dong Yan

中国化学快报. 2010, 21(12): 1493-1496. https://doi.org/10.1016/j.cclet.2010.07.015

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A versatile and effective method for incorporating functional groups on the pore wall of three-dimensionally ordered macroporous cross-linked polystyrene (3DOM CLPS) by hydrophilic spacer arm has been investigated. The 3DOM CLPS with pore size 865 nm was prepared by sacrifice template method. The hydrophilic spacer arm (polyethylene glycol, molecular weight is 600) was grafted to the 3DOM CLPS via nucleophilic substitution reaction. The other side of active hydroxyl can be further converted into a lot of other functional groups. In this report, the chelating ligand 2-mercaptobenzothiazole (MBZ) group was introduced on the end of the PGE chain to evidence the versatile functionalization approach. The functionalized ordered macroporous materials were characterized by FT-IR, element analyzer, SEM. The results reveal that the pores were successfully bonded with 2-mercaptobenzothiazole groups via hydrophilic spacer arms and the original morphology of ordered macroporous materials were remained after functionalization. The MBZ group density is 0.052 mmol/m². The functionalized 3DOM CLPS are expected to application as heavy metal ions adsorbent.

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Synthesis of polystyrene-styrene/butadiene diblock copolymers via reversible addition-fragmentation chain transfer miniemulsion polymerization

Zhen Xi Wang, Qing Hua Zhang, Yi Tao Yu, Xiao Li Zhan, Feng Qiu Chen, Ji Hai Xiong

中国化学快报. 2010, 21(12): 1497-1500. https://doi.org/10.1016/j.cclet.2010.06.001

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Polystyrene-styrene/butadiene diblock copolymers were synthesized via reversible addition-fragmentation chain transfer (RAFT) miniemulsion polymerization. During the polymerization process, the molecular weight distribution was narrow and the numerical molecular weight of the copolymers increased with increasing conversion of monomers, which was close to the theoretical. FT-IR and ¹H NMR results indicated that the microstructure of the polymer was mainly 1, 4-trans-butadiene with small amount of 1, 2-units, and composition in the copolymers was obtained.

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Methyl and methane elimination in the gas phase reaction of zirconium atom with 2-butyne:A DFT study

Tao Hong Li, Chuan Ming Wang, Xiao Guang Xie

中国化学快报. 2010, 21(12): 1501-1504. https://doi.org/10.1016/j.cclet.2010.07.025

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The mechanisms for CH₃-and CH₄-elimination in the gas phase reaction of ground-state Zr with 2-butyne has been investigated in detail using B3LYP method. For the elimination of CH₃, two mechanisms which are similar to those previously found for the reactions of Y and Zr with propyne are identified. The mechanism for the elimination of CH₄ was revealed as:Zr+CH₃C≡CCH₃→π-complex→TS (H-migration)→HZr-(H₂CCC)-CH₃→TS (C-C insertion)→ (H₂CCC)-HZr-CH₃→TS (H-migration)→CH₄+ZrC₃H₂.

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Electrodeposition of SnO₂ nanocrystalline thin film using butyl-rhodamine B as a structure-directing agent

Jing Yang, Shou Li Bai, Rui Xian Luo, Ai Fan Chen, Yuan Lin, Jing Bo Zhang

中国化学快报. 2010, 21(12): 1505-1508. https://doi.org/10.1016/j.cclet.2010.07.004

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Porous SnO₂ nanocrystalline thin films were successfully electrodeposited from an oxygen-saturated acid aqueous solution of SnCl₂ containing different concentrations of butyl-rhodamine B (BRhB) at 70℃. BRhB with substitute of amidocyanogen can be dissolved in the acid deposition solution, where HCl was added to suppress hydrolysis of SnCl₂. So it was used as a structure-directing agent to promote the crystal growth of SnO₂. The formed porous morphology and tetragonal rutile crystalline structure of the electrodeposited thin films were controlled by the addition of BRhB with different amounts.

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A novel polyaniline/mesoporous carbon nano-composite electrode for asymmetric supercapacitor

Jian Jun Cai, Ling Bin Kong, Jing Zhang, Yong Chun Luo, Long Kang

中国化学快报. 2010, 21(12): 1509-1512. https://doi.org/10.1016/j.cclet.2010.07.003

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A novel nano-composite of polyaniline/mesoporous carbon (PANI/CMK-3) was prepared with mesoporous carbon (CMK-3) serving as the support. Electrochemical asymmetric capacitors have been successfully designed by using PANI/CMK-3 composite and CMK-3 as positive and negative electrode, respectively. The results showed that the discharge capacity of the asymmetric capacitor could reach 87.4 Fig under the current density of 5 mA/cm² and cell voltage of 1.4 V. The energy density of the asymmetric capacitor was up to 23.8 Wh/kg with a power density of 206 W/kg. Furthermore, PANI/CMK-3-CMK-3 asymmetric capacitor using this PANI/CMK-3 nano-composite could be activated quickly and possess high charge-discharge efficiency.

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High dispersion Pt nanoparticles using mesoporous carbon support for enhancing conversion efficiency of dye-sensitized solar cells

Gui Qiang Wang, Jun Feng Gu, Shu Ping Zhuo

中国化学快报. 2010, 21(12): 1513-1516. https://doi.org/10.1016/j.cclet.2010.06.006

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Mesoporous carbon (MC) with surface area of 380 m²/g was prepared and employed as the carbon support of Pt catalyst for counter electrode of dye-sensitized solar cells. Pt/MC samples containing 1 wt% Pt were prepared by reducing chloroplatinic acid on MC using wet impregnation. It was found that Pt nanoparticles were uniform in size and highly dispersed on MC supports. The average size of Pt nanoparticles is about 3.4 rim. Pt/MC electrodes were fabricated by coating Pt/MC samples on fluorine-doped tin oxide glass. The overall conversion efficiency of dye-sensitized solar cells with Pt/MC counter electrode is 6.62%, which is higher than that of the cells with conventional Pt counter electrode in the same conditions.

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2010年, 第21卷, 第12期　刊出日期：2010-12-20

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本期目录

2010年, 第21卷, 第12期 刊出日期：2010-12-20

2010年, 第21卷, 第12期　刊出日期：2010-12-20