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国家自然科学基金(20107004)

作品数:4 被引量:3H指数:1
相关作者:谢家庆胡常伟曾宪诚黄忠冯发美更多>>
相关机构:四川大学更多>>
发文基金:国家自然科学基金更多>>
相关领域:理学更多>>

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4 条 记 录,以下是 1-7
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Accelerated Hydrolysis of p-Nitrophenyl Picolinate Catalyzed by Metallomicelle Made from a Novel Macrocyclic Polyamine Copper(Ⅱ) Complex
2007年
A copper(Ⅱ) complex 1 of a novel macrocyclic polyamine ligand with hydroxylethyl pendant groups, 4,11-bis(hydroxylethyl)-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L) has been synthesized and characterized. Rate enhancement for hydrolysis of p-nitrophenyl picolinate (PNPP) catalyzed by 1 was studied kinetically under Brij35 micellar condition. For comparision, the catalytic activity of corresponding copper(Ⅱ) complex 2 of non-substituted macrocyclic polyamine ligand, 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraaza-cyclotetradecane (L') toward the hydrolysis of PNPP was also investigated. The results indicate that the macrocyclic polyamine copper(Ⅱ) complex 1 effectively catalyzed the hydrolysis of PNPP, and the pendant ligand hydroxyl group or deprotonated pendant ligand hydroxyl group can act as catalytically active species in the reaction. A ternary Complex kinetic model involving metal ion, ligand and substrate has been proposed, and the results confirmed the reasonability of such kinetic model.
寇兴明赵国坡黄忠田玉华孟祥光曾宪诚
关键词:METALLOMICELLEHYDROLYSIS
TritonX-100胶束溶液中2,6-二甲基苯酚催化氧化偶合反应研究
The oxidative coupling of 2,6-Dimethylphenol Catalyzed by Copper(II) Schiff Complexes in aqueous buffer and Tr...
孟祥光黄忠杜娟曾宪诚
关键词:2,6-二甲基苯酚胶束催化动力学模拟酶
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金属胶束模拟辣根过氧化物酶催化过氧化氢氧化苯酚被引量:3
2003年
研究了咪唑衍生物钴配合物Co(biap)·Cl2和胶束形成的金属胶束作为模拟辣根过氧化物酶(HRP)催化H2O2氧化苯酚反应;探讨了过氧化氢浓度、反应温度、酸度和胶束性质影响催化反应的原因;提出了金属胶束催化氧化苯酚的反应历程;建立了金属胶束催化苯酚氧化的动力学数学模型.
黄忠谢家庆冯发美蒋炳英胡常伟曾宪诚
关键词:金属胶束
Catalyzed oxidation of 2,6-dimethylphenol in Triton X-100 micellar solution
2007年
The oxidative coupling reaction of 2,6-dimethylphenol with H202 catalyzed by a copper(H) Schiff complex in aqueous and Triton X-100 micellar solution under mild conditions was investigated. The kinetics of formation of 3,3',5,5'-tetramethyl-4,4'- diphenoquinone (DPQ) was studied. Rate constant k2 were obtained. The optimum pH for DPQ generation reaction is 7.25. The main product was DPQ in aqueous buffer solution, but PPE and the oxidized products of PPE remained in Triton X-100 micellar solution.
Jie ZhuXiang Guang MengHai Dong WangShan Dong LiuQin Hui PangJuan DuXian Cheng Zeng
关键词:2,6-DIMETHYLPHENOLMICELLEKINETICS
Rapid Phosphodiester Hydrolysis Catalyzed by Lanthanum(Ⅲ)
2005年
The catalytic hydrolysis of bis(4-nitrophenyl)phosphate (BNPP) by lanthanum(Ⅲ) ion in the presence of amino-alcoholic ligands: diethanolamine (DEA) and triethanolamine (TEA), was investigated kinetically at 30 ℃. The results indicated that the dinuclear dihydroxo complexes formed by lanthanum(Ⅲ) ion with aminoalcoholic ligands might be the catalytically active species which catalyze the hydrolysis of BNPP to different extents and the catalytic mechanism was believed to involve the synergism of double Lewis acid activation of the substrate and an intramolecular nucleophilic attack of a bridging oxo ligand.
寇兴明胡艳黄忠孟祥光曾宪诚
关键词:PHOSPHODIESTERHYDROLYSIS
咪唑衍生物配合物金属胶束催化对硝基苯酚吡啶甲酸酯(PNPP)水解动力学研究
<正> 近年来,以金属离子催化的羧酸酯水解反应作为羧酸酯水解金属酶(如羧肽酶A,碳酸酐酶等金属酶)的模拟体系已称为人们关注的热点。在羧肽酶A、碳酸酐酶等金属酶中,其活性部位上都包含有金属离子(Zn(Ⅱ)离子)及与金属离子...
寇兴明蒋炳英孟祥光黄忠曾宪诚
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金属胶束模拟过氧化物酶催化H2O2氧化对苯二酚的研究
<正> 对苯二酚是橡胶、染料、医药、食品以及材料等化学化工领域的重要原料和助剂。作为两电子还原试剂,对苯二酚在生物传递系统中起十分重要的作用。本论文合成了丁二酮肟合铜(Cu-1)和十四环烯合铜(Cu-2)两种铜配合物。研...
孟祥光寇兴明杜娟黄忠曾宪诚
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