Accelerating water exchange for Gd<sup>III</sup>chelates by steric compression around the water binding site
作者:Robert Ruloff、Éva Tóth、Rosario Scopelliti、Raphaël Tripier、Henri Handel、André E. Merbach
DOI:10.1039/b207713b
日期:——
macrocyclic GdIII complexes by inducing steric compression around the water binding site; the increased steric crowding was achieved by replacing an ethylene bridge of DOTA4- by a propylene bridge; in addition to the optimal water exchange rate, the stability of [Gd(TRITA)(H2O)]- is sufficiently high to ensure safe medical use which makes it a potential synthon for the development of high relaxivity, macromolecular
通过在水结合位点周围引起空间压缩,加快了九配位一水合大环GdIII配合物的水交换过程。通过用丙烯桥取代DOTA4-的乙烯桥来实现增加的空间拥挤。除了最佳的水交换率外,[Gd(TRITA)(H2O)]-的稳定性还足够高,可以确保安全的医疗用途,这使其成为开发高弛豫性高分子MRI造影剂的潜在合成子。