It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalys...It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalyst in the system of NaBrO3-Pyr-H2SO4. The ranges of initial concentration of main reactants in the system were obtained. The influence of temperature, Vc, Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed. The results indicated that Br- played an important role controlling reaction progress and some free radicals.Br2 may be involved in the reaction process. The stirring rate can affect oscillating reactions. The oscillation trajectories of this system were recorded. They are different from classical BZ reactions and some other tetraazamacrocyclic complexes catalyzed systems. The mechanism is briefly discussed.展开更多
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
文摘It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalyst in the system of NaBrO3-Pyr-H2SO4. The ranges of initial concentration of main reactants in the system were obtained. The influence of temperature, Vc, Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed. The results indicated that Br- played an important role controlling reaction progress and some free radicals.Br2 may be involved in the reaction process. The stirring rate can affect oscillating reactions. The oscillation trajectories of this system were recorded. They are different from classical BZ reactions and some other tetraazamacrocyclic complexes catalyzed systems. The mechanism is briefly discussed.
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。
