Single and Double pH-Driven Cu2+ Translocation with Molecular Rearrangement in Alkyne-Functionalized Polyamino Polyamido Ligands
作者:Annalisa Aurora、Massimo Boiocchi、Giacomo Dacarro、Francesco Foti、Carlo Mangano、Piersandro Pallavicini、Stefano Patroni、Angelo Taglietti、Robertino Zanoni
DOI:10.1002/chem.200501235
日期:2006.7.17
complex have been determined by X-ray diffraction. Finally, oxidation of Cu(2+) to Cu(3+) has been studied by cyclic voltammetry in water, which revealed that the redox reaction occurs only when the copper cation is within the diamino-diimido compartment. Moreover, both functionalization of the primary amines with bulky substituents and apical coordination of Cu(2+) make access to the 3+ oxidation state
一系列新的配体,包含一个(L1H(2)-L4H(2))或两个(L5H(4)-L6H(4))1,4,8,11-tetraaza-5,7-dione单元并进行了功能化已经合成了在C = O部分之间的C原子上具有炔丙基的基团。在水中已经确定了配体的质子化常数及其Cu(2+)配合物的形成常数,并且通过耦合pH值和分光光度滴定法研究了在各种pH值下存在的配合物的配位几何形状。能够简单地吸收Cu(2+)并形成中性,方形平面复合物的配体,该复合物包含-2-电荷的二氨基二亚氨基供体,并且配体还包含能够单和双阳离子易位的配位基团(喹啉或吡啶)已被调查。关于Cu(2+)的络合和易位,已经研究了氨基上取代基的作用和炔丙基所起的结构作用。在双转运配体L6H(4)中,当两个Cu(2+)离子在二氨基二酰胺基供体组内移动时,细长的炔丙基基团可以使整个配体空前折叠,并带有一个吡啶的顶端配位,形成一个五坐标方形金字塔形Cu