用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混...用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混合溶液中与电极直接传递电子,得到一对基于Fe(Ⅲ)/Fe(Ⅱ)电对的氧化还原峰,其峰为-0.085V和0.001V(V vs SCE)。研究了扫速及电解质pH值对FeⅢ-TAML的影响,其电化学反应是受表面控制的电极过程,其电势随着PBSpH值的增加而负移且成线性关系,直线斜率为-49.86mV·pH–1,说明FeⅢ-TAML的电子传递过程中伴有质子转移。展开更多
The Complex of the ligands containing pyridinecarboxamide with Mn2+, Fe3=,Ru3+ had been Synthesized. The composition andstructure of the metal complex had been determined by UV, IR.TG, XPS and elemental analysis .When...The Complex of the ligands containing pyridinecarboxamide with Mn2+, Fe3=,Ru3+ had been Synthesized. The composition andstructure of the metal complex had been determined by UV, IR.TG, XPS and elemental analysis .When the oxidation of cyclohexenewas catalyzed by the complexes with oxygen as oxided, the conversion reached 45.7%, the seleCtivity of cyclohexenone is 64.6%.Ruthenium complexes exhibits better selectivity for 1,2-cyclohexene oxide.展开更多
Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexe...Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexes as catalysts, chiral quaternary ammonium salts as phase transfer catalysts, and quinine as chiral auxiliary, sodium hypochlorite as oxidant. The results showed that the structure of manganese porphyrins, the chiral auxiliaries and temperature of reaction affected the asymmetric induction. The best enantiomer excess reached 12 8%.展开更多
文摘用海藻酸钠(Sodium Alginate,SA)将四酰胺基大环铁配合物(FeⅢ-TAML)固定在热解石墨电极表面,制成FeⅢ-TAML/SA膜修饰电极。交流阻抗结果显示FeⅢ-TAML可以很好的固定在SA膜中。包埋在SA膜中的FeⅢ-TAML在磷酸盐缓冲溶液(PBS)和乙醇混合溶液中与电极直接传递电子,得到一对基于Fe(Ⅲ)/Fe(Ⅱ)电对的氧化还原峰,其峰为-0.085V和0.001V(V vs SCE)。研究了扫速及电解质pH值对FeⅢ-TAML的影响,其电化学反应是受表面控制的电极过程,其电势随着PBSpH值的增加而负移且成线性关系,直线斜率为-49.86mV·pH–1,说明FeⅢ-TAML的电子传递过程中伴有质子转移。
文摘The Complex of the ligands containing pyridinecarboxamide with Mn2+, Fe3=,Ru3+ had been Synthesized. The composition andstructure of the metal complex had been determined by UV, IR.TG, XPS and elemental analysis .When the oxidation of cyclohexenewas catalyzed by the complexes with oxygen as oxided, the conversion reached 45.7%, the seleCtivity of cyclohexenone is 64.6%.Ruthenium complexes exhibits better selectivity for 1,2-cyclohexene oxide.
文摘Three complexes of tetrachlorophenylporphyrinatomanganese acetates have been synthesized and characterized by IR and UV spectra. The asymmetric epoxdation of styrene has been investigated by using these three complexes as catalysts, chiral quaternary ammonium salts as phase transfer catalysts, and quinine as chiral auxiliary, sodium hypochlorite as oxidant. The results showed that the structure of manganese porphyrins, the chiral auxiliaries and temperature of reaction affected the asymmetric induction. The best enantiomer excess reached 12 8%.