中国化学快报

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Regio- and stereo-selective synthesis of multi-substituted 3-pyrrolines

Jian Feng Xu, Peng Bin Li, Lu Ling Wu, Xian Huang

中国化学快报. 2009, 20(09): 1015-1016. https://doi.org/10.1016/j.cclet.2009.04.037

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A regio- and stereo-selective synthesis of multi-substituted 3-pyrrolines has been developed. The multi-substituted 3-pyrrolines were synthesized in good yields by 1,3-dipolar cycloaddition of methyl 2-(phenylselanyl)acrylate with azomethine ylides, followed by N-acylation and oxidation-elimination of phenylseleno group.

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The first facile total synthesis of natural (3R,4R,6S)-3,4-epoxybisabola-7(14),10-dien-2-one

Zhi Yong Tang Chen Xi Zhang, Li Jing Fang, Yu Lin Li

中国化学快报. 2009, 20(09): 1017-1018. https://doi.org/10.1016/j.cclet.2009.03.010

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3,4-Epoxybisabola-7(14),10-dien-2-one, a natural sesquiterpoind, was first synthesized from (-)-carvone through 7 steps, in an overall yield of 35.9%. The key step was the allylation and then a substrate-directable epoxidation was committed successfully.Mycobacterium tuberculosis FabH, an essential enzyme in mycolic acids biosynthetic pathway, is an attractive target for novel anti-tuberculosis agents. Structure-based design, synthesis of novel inhibitors of mtFabH was reported in this paper. A novel scaffold structure was designed, and 12 candidate compounds that displayed favorable binding with the active site were identified and synthesized.

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Structure-based design, synthesis of novel inhibitors of Mycobacterium tuberculosis FabH as potential anti-tuberculosis agents

Xue Hui Zhang, Hong Yu, Wu Zhong, Li Li Wang, Song Li

中国化学快报. 2009, 20(09): 1019-1022. https://doi.org/10.1016/j.cclet.2009.04.018

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Mycobacterium tuberculosis FabH, an essential enzyme in mycolic acids biosynthetic pathway, is an attractive target for novel anti-tuberculosis agents. Structure-based design, synthesis of novel inhibitors of mtFabH was reported in this paper. A novel scaffold structure was designed, and 12 candidate compounds that displayed favorable binding with the active site were identified and synthesized.

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First synthesis of (±)-cedarmycin B

Hai Shen Yang, Xiao Xiao Qiao, Qing Cui, Xiao Hua Xu

中国化学快报. 2009, 20(09): 1023-1025. https://doi.org/10.1016/j.cclet.2009.04.029

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The synthesis of racemic cedarmycin B, an antibiotic from Streptomyces sp. TP-A0456 was achieved firstly from γ-butyrolactone.The key step was a Barbier-type addition of 3-bromomethyl-5H-furan-2-one to formaldehyde mediated by zinc,which afforded the sole g-addition product 4-hydroxymethyl-3-methylene-dihydrofuran-2-one. The final compound was confirmed by ¹H NMR,₁₃C NMR and HRMS.

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Nuclephilic ring opening of epoxides promoted by multi-site phase-transfer catalyst:An efficient and eco-friendly route to synthesis of b-hydroxy-thiocyanate

Ali Reza Kiasat Roya Mirzajani, Haji Shalbaf, Tahereh Tabatabaei

中国化学快报. 2009, 20(09): 1026-1029. https://doi.org/10.1016/j.cclet.2009.04.015

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A highly effective and mild protocol for ring opening of epoxides with NH ₄ SCN in the presence of catalytic amount of a multisite phase-transfer catalyst, α,α',α" -N-hexakis(triethylammoniummethylene chloride)-melamine, is developed. A variety of b-hydroxy thiocyanates as important intermediates in agricultural and pharmaceutical chemistry were obtained in high yields with excellent regioselectivity and in short reaction times.

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Preparation of silybin 23-esters and evaluation of their inhibitory ability against LPO and DNA protective properties

Ke Xin Huang, Jing Xu Gong, Wei Xiong, Lei Xiang Yang, Feng Wang, Qiao Feng Tao, Yi Hang Wu, Xiao Kun Li, Joachim Stöckigt, Yu Zhao, Jia Qu

中国化学快报. 2009, 20(09): 1030-1033. https://doi.org/10.1016/j.cclet.2009.05.009

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Twelve 23-esterified silybin derivatives with different patterns of substituents such as aromatic and aliphatic groups (1-12) were designed and synthesized. The antioxidative properties of these compounds were evaluated. The modified silybin analogues exhibited improved inhibitory effects against rat liver homogenate lipid peroxidation compared to silybin, with exception of the trimethoxylated ester (5) and the aliphatic one (9). Compounds 3, 5, 7, 8 and 11 displayed their protective properties on DNA cleavage in a dose-dependent manner.

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Ferrous methanesulfonate as an efficient and recyclable catalyst for chemoselective synthesis of 1,1-diacetate from aldehydes

Min Wang, Gui Fu Tian, Zhi Guo Song, Heng Jiang

中国化学快报. 2009, 20(09): 1034-1038. https://doi.org/10.1016/j.cclet.2009.05.008

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Ferrous methanesulfonate catalysing the conversion of aromatic, heteroaromatic, unsaturated, and aliphatic aldehydes to 1,1- diacetates at room temperature under solvent-free condition has been developed. The catalytic activity of seventeen metal methanesulfonates was compared under the same condition, ferrous methanesufonate proved to be the best. It can be easily recovered and reused for several times without distinct deterioration in catalytic activity. During the competitive protection between a ketone and an aldehyde group with Ac ₂ O, 1,1-diacetate formed exclusively with the aldehyde group.

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Synthesis of novel redox calix[4]arene derivative with1,3-substituted large conjugated ferrocene bridge

Bi Qiong Hong, Fa Fu Yang Hong Yu Guo, Yan Hua Wang, Xian Feng Chai

中国化学快报. 2009, 20(09): 1039-1041. https://doi.org/10.1016/j.cclet.2009.04.008

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A novel redox calix[4]arene derivative with 1,3-substituted large conjugated ferrocene bridge was designed and synthesized in high yield. Its structure was characterized by element analysis, IR, ESI-MS, NMR spectrum, etc. The primary study of cyclic voltammetry showed it possessed excellent reversible electrochemistry response property.

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Alum:An efficient catalyst for one-pot synthesis of α-aminophosphonates

Swapnil S. Sonar, Kiran F. Shelke, Gopal K. Kakade, Bapurao B. Shingate, Murlidhar S. Shingare

中国化学快报. 2009, 20(09): 1042-1046. https://doi.org/10.1016/j.cclet.2009.04.024

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Alum (KAl(SO ₄)₂·12H ₂O) is an inexpensive, efficient, non-toxic and mild catalyst for the one-pot synthesis of α-aminophosphonates.A three component reaction of an aldehyde/ketone, an amine and triethyl phosphite was carried out under solvent-free conditions to afford the corresponding a-aminophosphonates in short reaction times and high yields with the green aspects by avoiding toxic catalysts and solvents.

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A bright blue emission material based on anthracene:Synthesis,characterization and luminescent properties

Lin Fang Shi, Bin Li, Li Ying Zhang

中国化学快报. 2009, 20(09): 1047-1050. https://doi.org/10.1016/j.cclet.2009.03.017

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A blue light-emitting material, 2-(N-ethyl-anthraceneyl-9) imidazo [4,5-f] 1,10-phenanthroline (EAIP), has been synthesized and characterized by ¹H NMR, IR, elemental and single crystal X-ray diffraction analysis. The results of theoretical calculations indicate that the HOMO and LUMO distributions mainly locate at the anthracene fragment. It displays bright blue emission in both solid state and dichloromethane solution. The emission quantum yield calculated is 0.76.

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Acid-base cooperativity of heterogeneous catalyst containing acidic framework and sterically hindered base for aldol condensation

Hua Li, Shu Tao Xu, Xiao Bing Lu, Wei Ping Zhang

中国化学快报. 2009, 20(09): 1051-1054. https://doi.org/10.1016/j.cclet.2009.04.011

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A bifunctional heterogeneous catalyst containing two mutually incompatible acidic and basic sites, which exhibits cooperative catalytic behavior in the aldol condensation of acetone and various aldehydes, was synthesized by postgrafting of 1,5,7- triazabicyclo[4.4.0] dec-5-ene (TBD, a sterically hindered organic base) onto Al-MCM-41 molecular sieve.

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Efficient synthesis of 5,6-dihydrothieno[3',2':4,5] thieno[2,3-d]pyrimidin-4(3H)-ones via an iminophosphorane

Yu Lu Chen, Yi Bo Nie, Ming Wu Ding

中国化学快报. 2009, 20(09): 1055-1058. https://doi.org/10.1016/j.cclet.2009.04.004

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5,6-Dihydrothieno[3',2':4,5]thieno[2,3-d]pyrimidin-4(3H)-ones 6 were synthesized in yields of 71-87% by a consecutive method, which includes aza-Wittig reaction of iminophosphorane 3 with aromatic isocynate to give carbodiimide 4 and subsequent reaction of 4 with various amines, phenols or alcohols in the presence of catalytic amount of sodium ethoxide or solid potassium carbonate.

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An efficient Biginelli one-pot synthesis of new benzoxazolesubstituted dihydropyrimidinones and thiones catalysed by trifluoro acetic acid under solvent-free conditions

D. Shobha, M. Adharvana Chari K. H. Ahn

中国化学快报. 2009, 20(09): 1059-1061. https://doi.org/10.1016/j.cclet.2009.03.024

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An efficient synthesis of benzoxazole-substituted 3,4-dihydropyrimidinones (DHPMs) using trifluoro acetic acid as the catalyst for the first time from an aldehyde, b-keto ester and benzoxazole-substituted urea/thiourea under solvent-free conditions is described. Compared to the classical Biginelli reaction conditions, this new method consistently has the advantage of excellent yields (80-91%) and short reaction time (40-130 min) at reflux temperature.

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First total synthesis of two nematicidal prenylated flavanones

Jin Hui Yang Shi Zhi Jiang, Yan Min Zhao, Yun Feng Li, Cong Bin Ji, Wan Yi Liu

中国化学快报. 2009, 20(09): 1061-1064. https://doi.org/10.1016/j.cclet.2009.04.017

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The total synthesis of (±)-8-(3-methylbut-2-enyl)-2-phenyl-2,3-dihydrochromen-4-one and (±)-2-(4-hydroxyphenyl)-8-(3-methylbut-2-enyl)-2,3-dihydrochromen-4-one was first achieved through C-prenylation, protection of phenolic hydroxyl group aldol condensation, cyclization and deprotection starting from cheap benzaldehyde, 4-hydroxybenzaldehyde and 2-hydroxyacetophenone,with total yield of 20 and 16.3%. All structures of new compounds were confirmed by IR,¹H NMR and MS.

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Direct asymmetric aldol reaction using MBHA resin-supported peptide containing L-proline unit

Liang Zhang, Wen Bo Ding, Yong Ping Yu, Hong Bin Zou

中国化学快报. 2009, 20(09): 1065-1067. https://doi.org/10.1016/j.cclet.2009.04.034

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MBHA resin-supported tripeptide catalyst system containing L-proline unit has been developed for use in the direct asymmetric aldol reaction of acetone and aldehydes, which afford the corresponding products with satisfactory isolated yields and enantiomeric excesses.

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Solvent-free alkylation of dimethyl malonate using benzyl alcohols catalyzed by FeCl₃/SiO₂

Mohammad Reza Shushizadeh, Masumeh Kiany

中国化学快报. 2009, 20(09): 1068-1072. https://doi.org/10.1016/j.cclet.2009.04.033

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Activated methylene compound such as dimethyl malonate reacted readily with benzylic alcohols in the presence of ferric chloride/silica gel mixture (FeCl₃/SiO₂) under microwave irradiation to produce benzylic derivative of dimethyl malonate in high yields in solvent-free condition.

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Microwave promoted synthesis of some N-(4-methyl-3-tolylthiazol-2(3H)-ylidene) substituted benzamides

Aamer Saeed

中国化学快报. 2009, 20(09): 1073-1076. https://doi.org/10.1016/j.cclet.2009.04.016

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N-(4-Methyl-3-tolylthiazol-2(3H)-ylidene) substituted benzamides (2a-o) were synthesized in good to excellent yields by the base-catalyzed direct cyclization of corresponding 1-tolyl-3-aryl thioureas (1a-o) with 2-bromoacetone through microwave irradiation in a solvent-free medium. Compared to traditional thermal heating, microwave irradiation provides a much more cleaner, efficient and faster method for synthesis of the title compounds.

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Reinvestigation of liquid crystalline property of dimesogenic compound consisting of cholesterol and cyanobiphenyl

Hai Quan Zhang, Wen Ke Liu, Li Cheng Zhao, Zi Hui Cheng, Shuai Zhang, Ying Li, Huai Yang

中国化学快报. 2009, 20(09): 1077-1080. https://doi.org/10.1016/j.cclet.2009.04.013

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The dimesogenic compound consisting of cholesterol and cyanobiphenyl mesogens interlinked by ω-oxyalkanoyl spacer was synthesized. The mesomorphic properties were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). The experimental results indicated that this compound exhibited mesophase over a much wider temperature range and a new mesophase blue phase (BP). Focal conic domains (FCDs) and droplets texture to the smectic A phase (S_A), oily streaks typical to the chiral nematic (N^*) phase were found in the liquid crystalline state, respectively. Besides, it exhibited a smectic layer spacing about 1.0 time to the length of the molecule, which indicated a monolayer type of S_Aordering.

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New mesogenic Schiff base esters comprising benzothiazole moiety:Synthesis and mesomorphic properties

Sie Tiong Ha, Teck Ming Koh, Guan Yeow Yeap, Hong Cheu Lin, Jun Kit Beh, Yip Foo Win d, Peng Lim Boey

中国化学快报. 2009, 20(09): 1081-1084. https://doi.org/10.1016/j.cclet.2009.03.048

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A homologous series of Schiff base esters, 6-methoxy-2-(2-hydroxy-4-alkanoyloxybenzylidenamino)benzothiazoles, comprising a benzothiazole moiety as the core was synthesized. All the members of this series exhibited an enantiotropic nematic phase.The azomethine linkage along with the lateral hydroxyl and terminal methoxyl groups were found to exert an effect on themesomorphic properties.

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A series of carbosilane dendrimers with acetyl end-group:Fromsynthesis to their unique optical characteristics

Wen Yan Sun, Hai Feng Lu, Deng Xu Wang, Sheng Yu Feng

中国化学快报. 2009, 20(09): 1085-1087. https://doi.org/10.1016/j.cclet.2009.05.016

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A series of carbosilane dendrimers with acetyl end-group were synthesized. Their structures were characterized by ¹H NMR, IR,and MS, respectively. Then dendrimers were coordinated with lanthanide ions (Eu ³⁺and Tb³⁺, respectively). The luminescencespectra of the complexes show narrow-width emissions in visible light region.

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A new trimeric furanocoumarin from Heracleum rapula

Cun Zhang, YuanYan Liu, Yong Qing Xiao Li Li

中国化学快报. 2009, 20(09): 1088-1090. https://doi.org/10.1016/j.cclet.2009.05.005

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A new trimeric linear-type furanocoumarin, rapultririn A (1), was isolated from the underground part of Heracleum rapula. The structure of this new compound was elucidated by NMR, MS spectroscopic methods.

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New cytotoxic cerebroside from Gynura divaricata

Lei Chen, Jin Jiang Wang, c, Hong Tao Song, Guo Gang Zhang, Lu Ping Qin

中国化学快报. 2009, 20(09): 1091-1093. https://doi.org/10.1016/j.cclet.2009.04.021

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A new cerebroside, gynuraoside (1), was isolated from the aerial parts of Gynura divaricataDC. It was determined to be 1-O-β- D-glucopyranosyl-(2S,3S,4R,10E)-2-[(2'R)-2'-hydroxyldocosanoyl-amino]-10-octadecene-1,3,4-triol on the basis of chemical and spectroscopic evidence. This compound showed strong cytotoxicity against L1210 leukemia cell line in vitro.

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A new steroidal alkaloid from Beaumontia grandiflora

Li Ma, Jian Guang Luo, Yu Cheng Gu, Ling Yi Kong

中国化学快报. 2009, 20(09): 1094-1096. https://doi.org/10.1016/j.cclet.2009.03.044

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A new steroidal alkaloid, beaumontamine (1), was isolated from the stems of Beaumontia grandiflora. The structure waselucidated on the basis of spectral analysis.

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Two new glycosides from the seeds of Cassia obtusifolia

Cun Zhang, Gui Liu Li, Yong Qing Xiao Li Li, Zhen Pang

中国化学快报. 2009, 20(09): 1097-1099. https://doi.org/10.1016/j.cclet.2009.04.006

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Two new glycosides, nor-rubrofusarin-6-0-β-D-(6'-O-acetyl)glucopyranoside (1) and 1-desmethylaurantio-obtusin-2-O-β-Dglucopyranoside(2) were isolated from the seeds of Cassia obtusifolia and their structures were established by chemical and spectral evidences.

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Selective separation and enrichment of proteins in aqueous two-phase extraction system

Feng Qu, Hao Qin, Min Dong, Dong Xu Zhao, Xin Ying Zhao, Jing Hua Zhang

中国化学快报. 2009, 20(09): 1100-1102. https://doi.org/10.1016/j.cclet.2009.04.023

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A simple aqueous two-phase extraction system (ATPS) of PEG/phosphate was proposed for selective separation and enrichment of proteins. The combination of ATPE with HPLC was applied to identify the partition of proteins in two phases. Five proteins (bovine serum albumin, Cytochrome C, lysozyme, myoglobin, and trypsin) were used as model proteins to study the effect of phosphate concentration and pH on proteins partition. The PEG/phosphate system was firstly applied to real human saliva and plasma samples, some proteins showed obviously different partition in two phases. The primary results manifest the selective separation and enrichment of proteins in ATPS provided the potential for high abundance proteins depletion in proteomics.

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A new metabonomics method for simultaneous determination of EFAs and NEFAs in plasma using GC-MS and its application

Li Da Han, Qiong Lin Liang, Yi Ming Wang, Ping Hu, Guo An Luo

中国化学快报. 2009, 20(09): 1103-1106. https://doi.org/10.1016/j.cclet.2009.04.022

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A new metabonomics method was developed for simultaneous qualitative and quantitative analysis on esterified and nonesterified fatty acids (EFAs and NEFAs) in plasma. Merely 10 μL of plasma was required. The pretreatment of the sample was simple without disposing the protein. After simple extraction and derivation, 15 FAs in plasma were precisely quantified. Gas chromatography tandem mass spectrometry (GC-MS) was used in the study and the quantities of the analytes, which varied in abundance over three orders of magnitude. The established method showed good accuracy. The curve correlation coefficients were all above 0.997. The RSDs of precision for all compounds were below 15% and recoveries were all between 80 and 110%. PLS-DA modal was used in the data management.b

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DNA cleavage promoted by diethylenetriaminepentaacetic acid　(DTPA) derivatives　

Zhong Wei Yao, Jun Xu, Da Wei Zhang, Hong Hui Lin, Chuan Qin Xia

中国化学快报. 2009, 20(09): 1107-1110. https://doi.org/10.1016/j.cclet.2009.03.049

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DTPA and its two derivatives were synthesized and used as catalysts in DNA cleavage. Under physiological conditions, a seriesof experiments have been done. The effects of DNA cleavage with three ligands were studied under different concentrations,cleavage time, and pH values. The results strongly suggested that the plasmid DNA (pUC 19) can be cleaved efficiently by CITC- DTPA. For the cleavage reaction catalyzed by CITC-DTPA, Form I DNA could convert to Form Ⅱ mostly, and the DNA-cleavage mechanism involved an oxidative pathway.

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A novel ionic liquids grafted polysiloxane for capillary gas　chromatography

Qing Quan Wei, Mei Ling Qi Ruo Nong Fu

中国化学快报. 2009, 20(09): 1111-1114. https://doi.org/10.1016/j.cclet.2009.04.002

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A new ionic liquids grafted polysiloxane used as stationary phase for capillary gas chromatography (CGC) is described. The stationary phase of 1-vinyl-3-hexylimidazolium hexafluorophosphate anchored to polysiloxane (PMHS-[VHIm][PF ₆]) was synthesized,characterized and coated onto capillary columns by static coating. The results show that the present stationary phase exhibits avery good chromatographic resolution and selectivity for Grob test mixture and alcohols with baseline resolution and symmetry peaks.The present work suggests that novel stationary phase has a great potential for further development and application.

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Effect of SDBS on interfacial electron transfer at the　liquid/liquid interface by thin layer metho

Xiu Hui Liu, Cun Wu Dong, Kai Zhang, Fu Peng Zhi, Zhen Ding, Xiao Quan Lu

中国化学快报. 2009, 20(09): 1115-1118. https://doi.org/10.1016/j.cclet.2009.04.035

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The effect of an adsorbed anionic surfactant sodium dodecyl benzene sulfonate (SDBS) on electron transfer (ET) reaction between ferricyanide aqueous solution and decamethylferrocene (DMFc) located on the adjacent organic phase was investigated for the first time by thin layer method. The adsorption of SDBS at the interface resulted in a decay in the cathodic plateau current of bimolecular reaction with increasing concentrations of SDBS in aqueous phase. However, the rate constant of electron transfer (k_et)increased monotonically as the SDBS concentrations increased from 0 to 200 μmol/L. The experimental results showed that SDBS formed patches on the interface and influenced the structure of electrical double layer.

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Interaction of CdTe/CdS quantum dots with antibodies

Chen Shi, Xiang Yi Huang, Chao Qing Dong, Hong Jin Chen, Ji Cun Ren

中国化学快报. 2009, 20(09): 1119-1122. https://doi.org/10.1016/j.cclet.2009.04.020

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In the study, we observed the strong adsorption of CdTe/CdS QDs to antibodies and the formation of QDs-antibodies conjugates.Capillary elect correlation spectroscopy (FCS) were used to characterize the QDs conjugates with antibody. We found that the QDs-antibody conjugates possessed high fluorescence, small hydrodynamic radii and good stability in aqueous solution.

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A covalent modified hydrophilic capillary for enhanced　capillary electrophoresis of biopolymers

Lian Guo Shan, Xue Yu, Yin Mao Wei, Xiao Hui Zheng, Jian Bin Zheng

中国化学快报. 2009, 20(09): 1123-1126. https://doi.org/10.1016/j.cclet.2009.04.005

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In the study, we observed the strong adsorption of CdTe/CdS QDs to antibodies and the formation of QDs-antibodies conjugates.Capillary elect correlation spectroscopy (FCS) were used to characterize the QDs conjugates with antibody. We found that the QDs-antibody conjugates possessed high fluorescence, small hydrodynamic radii and good stability in aqueous solution.

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Synthesis and characterization of fluorinated PEO-b-PDMS-b-fluorinated PEO by free radical addition

Wei Hu Li, Xing Yuan Zhang Jia Bing Dai

中国化学快报. 2009, 20(09): 1127-1130. https://doi.org/10.1016/j.cclet.2009.03.012

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Fluorinated poly(ethylene oxide) propyl-b-polydimethylsiloxane-b-propyl fluorinated poly(ethylene oxide) (FPEO-b-PDMS-b-FPEO) was synthesized by a free radical addition of carbon–hydrogen of polyether segments of poly(ethylene oxide) propyl-bpolydimethylsiloxane-b-propyl poly(ethylene oxide) (PEO-b-PDMS-b-PEO) to hexafluoropropylene (HFP) using tert-butyl peroxypivalate as an initiator. In order to reduce the possibility of side reaction, the protection and deprotection via silylation were used for the end-hydroxyls in PEO-b-PDMS-b-PEO chain. The structure of Intermediates and FPEO-b-PDMS-b-FPEO was confirmed by means of Fourier transform infrared and ¹H NMR spectroscopy. The effects of amount of initiator, reaction temperature and time on free radical addition were investigated in detail.

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Synthesis and characterization of miktoarm star copolymer of styrene and butadiene using multifunctional macromolecular initiator

Hai Yan Zhang, Xing Ying Zhang

中国化学快报. 2009, 20(09): 1131-1135. https://doi.org/10.1016/j.cclet.2009.04.003

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A new kind of multifunctional macromolecular initiator with Sn-C bonds and polydiene arms was synthesized by living anionic polymerization. At first, polydiene-stannum chloride (PD-SnCl ₃) was prepared by the reaction of n-butyl-Li (n-BuLi), stannic chloride (SnCl₄) and diene. Then PD-SnCl ₃ was used to react with the dilithium initiator to prepare the multifunctional organic macromolecular initiators. The result suggested that the initiators had a remarkable yield by GPC, nearly 90%. By using these multifunctional macromolecular initiators, styrene and butadiene were effectively polymerized via anionic polymerization, which gave birth to novel miktoarm star copolymers. The relative molecular weight and polydispersity index, microstructure contents, copolymerization components, glass transition temperature (T_g) and morphology of the miktoarm star copolymers were investigated by GPC-UV,¹H NMR, DSC and TEM, respectively.

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Evaluation of the clenbuterol imprinted monolithic column prepared by reversible addition-fragmentation chain transfer polymerization

Mamat Turson, Xiao Lei Zhuang, Hui Na Liu, Ping Jiang, Xiang Chao Dong

中国化学快报. 2009, 20(09): 1136-1140. https://doi.org/10.1016/j.cclet.2009.04.012

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To make more homogenous organic monolithic structure, reversible addition-fragmentation chain transfer (RAFT) process was employed in the synthesis of the clenbuterol imprinted polymer. In the synthesis, the influence of synthetic conditions on the polymer structure and separation efficiency was studied. The result demonstrated that the imprinted columns prepared with RAFT process have higher column efficiency and selectivity than the columns prepared with conventional polymerization in the present study, which may result from the higher surface area, smaller pore size and the narrower globule size distribution in their structures.The result indicated that RAFT polymerization provided better conditions for the clenbuterol imprinted monolithic polymer preparation.

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2009年, 第20卷, 第09期　刊出日期：2009-09-20

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2009年, 第20卷, 第09期 刊出日期：2009-09-20

2009年, 第20卷, 第09期　刊出日期：2009-09-20