BiosCiences FRE CNRS 3005, Faculté des Sciences et Techniques, Université Paul Cézanne Aix-Marseille III, avenue Escadrille Normandie-Niémen, 13397 Marseille Cedex 20, France.
Bioinorg Chem Appl. 2007;2007:43424. doi: 10.1155/2007/43424.
Two copper(II)-ACC complexes were prepared and characterized: [Cu(bpy)(ACC)(H(2)O)]CO(4) (1) and Cu(ACC)(2).4H(2)O (2). Their crystallographic structures are described and analyzed. Spectroscopic characterizations (UV-visible and EPR) confirm that the structure is maintained in solution. These complexes are able to produce ethylene in the presence of hydrogen peroxide in an "ACC Oxidase-like" reaction in water and in methanol. The conversion of ACC into ethylene depends on the amount of base, and, in methanol, 3 equivalents of NaOH are needed for optimum activity. The base is proposed to play a role in H(2)O(2) deprotonation. The presence of an exogenic ligand (bpy) is important for the reactivity and may stabilize a reaction intermediate. Indeed, a brown intermediate with an absorption band centered at 433 nm can be detected at low temperature when 1 is treated with 10 equivalents of H(2)O(2).
制备并表征了两个铜（II）-ACC 配合物：[Cu(bpy)(ACC)(H(2)O)]CO(4) (1) 和 Cu(ACC)(2).4H(2)O (2)。描述并分析了它们的晶体结构。光谱特性（UV-可见和 EPR）证实该结构在溶液中得以保持。这些配合物在水和甲醇中能够在过氧化氢的存在下通过“ACC 氧化酶样”反应产生乙烯。ACC 向乙烯的转化取决于碱的量，在甲醇中，需要 3 当量的 NaOH 才能达到最佳活性。碱被认为在 H(2)O(2)去质子化中起作用。外源配体 (bpy) 的存在对反应性很重要，并且可能稳定反应中间体。事实上，当 1 用 10 当量的 H(2)O(2)处理时，可以在低温下检测到具有 433nm 中心吸收带的棕色中间体。
