Synthesis and Characterization of a Novel Macrocyclic Chelator with 3-Hydroxy-4-Pyrone Chelating Arms and Its Complexes with Medicinally Important Metals
作者:Chang-Tong Yang、Subramanya G. Sreerama、Wen-Yuan Hsieh、Shuang Liu
DOI:10.1021/ic7022506
日期:2008.4.1
amine-N and two enolate-O atoms bonding to Cu(II) and one of three 3-hydroxy-4-pyrone chelating arms remaining free and protonated. The cyclic voltammogram of Fe(NOKA) exhibits a quasi-reversible redox wave at E(1/2) = -0.53 mV from the Fe(III)(NOKA)/Fe(II)(NOKA)(-) couple, whereas Cu(HNOKA) shows an irreversible one-electron reduction of Cu(II)(HNOKA)/Cu(I)(HNOKA)(-) at E(pc) = -0.87 V. These low
一种新的大环螯合剂6,6',6''-(1,4,7-三氮杂烷-1,4,7-三基)三(亚甲基)三(5-羟基-2-(羟基甲基)-4H-在过量甲醛的存在下,由1当量的1,4,7-三氮杂环壬烷(TACN)与3当量的曲酸(KA)反应合成了吡喃-4-酮(H3NOKA)(H3NOKA)。H 3 NOKA与金属盐的反应形成配合物M(NOKA)(M = Ga,In和Fe)和Cu(HNOKA)。H 3 NOKA及其配合物M(NOKA)(M = Ga,In和Fe)和Cu(HNOKA)已通过IR,UV / vis,ESI-MS和元素分析进行了表征。通过X射线晶体学测定了Ga(NOKA),Fe(NOKA)和Cu(HNOKA)的结构。在固态状态下,Ga(NOKA)和Fe(NOKA)是同构的,具有扭曲的八面体几何形状。相比之下,Cu(HNOKA)具有扭曲的方金字塔形配位几何结构,其中NOKA是五齿的,三个胺N和两个烯