The Influence of Linker Geometry in Bis(3-hydroxy-N-methyl-pyridin-2-one) Ligands on Solution Phase Uranyl Affinity
作者:Géza Szigethy、Kenneth N. Raymond
DOI:10.1002/chem.201002372
日期:2011.2.7
unsubstituted reference ligands. Uranyl affinity was found to follow no discernable trends with incremental geometric modification. The butyl‐linked 4 li‐Me‐3,2‐HOPO ligand exhibited the highest uranyl affinity, consistent with prior in vivo decorporation results. Of the rigidly‐linked ligands, the o‐phenylene linker imparted the best uranyl affinity to the bis‐Me‐3,2‐HOPO ligand platform.
合成了七个水溶性的四齿双(3-羟基-N-甲基-吡啶-2-酮)(双-Me-3,2-HOPO)配体,它们仅在接头几何形状和刚性方面有所不同。在pH 1.6和pH 9.0之间进行溶液相热力学测量,以确定这些变化对质子和铀酰阳离子亲和力的影响。与未取代的参考配体相比,通过引入可溶的三甘醇基团,质子亲和力降低。发现,随着几何形状的增加,铀酰的亲和力没有明显的变化。丁基连接的4 li-Me-3,2-HOPO配体表现出最高的铀酰亲和力,与之前的体内降解结果一致。在刚性连接的配体中,o-亚苯基接头赋予bis-Me-3,2-HOPO配体平台最佳的铀酰亲和力。