facilitate complexation (preorganization concept). A preliminary chelation test revealed a marked selectivity of the nitrogen-containing ligand for indium-111. In accordance with the hard and soft acid and base (HSAB) theory, the choice of ligand should result in notable differences in behaviour during complexation and, thus, augment selectivity with regard to the metal. (© Wiley-VCH Verlag GmbH &
我们合成了三种刚性多羧化六齿
配体,它们的区别仅在于杂原子的性质,氧 (1)、氮 (2) 或
硫 (3)。这些化合物是在保护/脱保护序列后由取代的邻
苯胺分四或五步获得的。选择芳香主链来加强
配体的结构,从而促进络合(预组织概念)。初步螯合试验表明含氮
配体对
铟 111 具有显着的选择性。根据硬和软酸碱 (H
SAB) 理论,
配体的选择会导致络合过程中的行为发生显着差异,从而增加对
金属的选择性。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)