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张政朴, 林超, 张政朴*, 朱晓夏,
化学通报,2003(8):536~543,-0001,():
-1年11月30日
清除树脂是一种特殊的固相试剂。近五年,它们被广泛的用于平行液相法合成组合化学库,简化液相组合化学库的纯化操作。本文综述了清除树脂在纯化操作中的使用策略。根据清除纯化原理,介绍了共价键型和离子键型两类清除树脂。给出了清除树脂在组合化学中的具体应用实例。最后对清除树脂的发展作了展望。
清除树脂, 平行液相合成, 组合化学库, 纯化操作
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【期刊论文】聚四氟乙烯纤维辐照接枝制备弱酸性离子交换剂及其对Cu2+的吸附*
张政朴, 张政朴**, 王志鹏, 吴强, 张宝贵, 张砚耕
高分子学报,2004,1(1):84~87,-0001,():
-1年11月30日
以聚四氟乙烯纤维为基体通过60Co辐射引发与丙烯酸接枝制备弱酸性阳离子交换纤维。产物功能基含量为3.06mmol/g,在pH=5时该纤维达到对Cu2+的最大动态吸附量为107.48mg/g。使用不同浓度HCl对饱和吸附铜的接枝纤维进行洗脱,证实该纤维对铜离子具有优异的解吸性能。
聚四氟乙烯,, 辐照接枝,, 离子交换纤维,, 铜离子
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【期刊论文】Asymmetric synthesis of α-amino acids using polymersupported chiral phase transfer catalysts
张政朴, Zhang Zhengpu a, , Wang Yongmer a, Wang Zhen a, Philip Hodge b, *
Reactive & Functional Polymers 41(1999)37-43,-0001,():
-1年11月30日
Polymer-supported quininium, cinchoninium and cinchonidinium salts were used as phase transfer catalysts for the asymmetric C-alkylation of N-diphenylmethyleneglycine t-butyl ester in the synthesis of chiral phenylalanine, alanine, valine and 2-aminopent-4-enoic acid. The influence of the alkylation conditions on the chemical yields and the enantiomeric excesses were studied. The highest enantiomeric excess obtained was 27%. Although the enantiomeric excesses obtained in the present work are lower than those obtained in the corresponding non-supported reactions, they are nevertheless significantly higher than those obtained in most other polymer-supported phase transfer catalysed asymmetric syntheses so far reported in the literature.
α-Amino acids, Polymer-supported catalysts, Asymmetric synthesis, Phase transfer catalysts
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张政朴, Cai-Yan Lu, a, b, Xiu-Ping Yan, *a, Zheng-Pu Zhang, Zhi-Peng Wang a, and Li-Wen Liu b
J. Anal. At. Spectrom., 2004, 19, 277-281,-0001,():
-1年11月30日
of 0.01-50% v/v HCl, its sorption onto the surface of the PTFE fiber in the microcolumn, elution with 3% m/v KBH4 in 0.5% m/v KOH, hydride generation with 15% v/v HCl solution and determination with atomic fluorescence spectrometry. The alkaline KBH4 solution was employed not only as an efficient eluent but also as the reductant to produce selenide anion for subsequent hydride generation. With a consumption of 12.4ml of sample solution, a detection limit (3δ) of 4ng l-1 was achieved at a sample throughput of 26 samples h-1. The retention efficiency was 67%, being five times that obtained with a PTFE knotted reactor (KR). The linear ranges of the diagrams of signal intensity against sample loading flow rate, and sample loading time, were much wider than those achieved with a KR, offering more potential for obtaining high sensitivity by increasing sample loading rates and/or sample loading time. The precision for 11 replicate measurements of 0.5µg l-1 Se (IV) was 1.5% (RSD). The recoveries of Se (IV) from natural water samples varied from 96 to 108%. The concentration of Se (IV) in a certified reference material (NASS-5, sea-water) determined by the present method with a simple aqueous standard curve calibration was in good agreement with the certified value. The developed method was also successfully applied to the detection of Se (IV) in local river water, lake water and sea-water samples.
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张政朴, Zheng Pu ZHANG*, Zhi Peng WANG, Bao Gui ZHANG, Yan Geng ZHANG
Chinese Chemical Letters Vol. 14, No.6, pp 609-610, 2003,-0001,():
-1年11月30日
The polytetrafluoroethylene fiber grafted acrylic acid was used as a cation exchanger. The exchange capacity of the cation fiber is 3.06mmol/g. The maximum Cu2+ adsorption capacity is 107.48mg/g. It could be desorbed completely by 1mol/L HCl.
Polytetrafluoroethylene fiber,, acrylic acid grafting,, Cu2+, adsorption.,
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