Rational Design of High‐Relaxivity Eu
<sup>II</sup>
‐Based Contrast Agents for Magnetic Resonance Imaging of Low‐Oxygen Environments
作者:Matthew D. Bailey、Guo‐Xia Jin、Fabio Carniato、Mauro Botta、Matthew J. Allen
DOI:10.1002/chem.202004450
日期:2021.2.10
Metal‐based contrast agents for magnetic resonance imaging present a promising avenue to image hypoxia. EuII‐based contrast agents have a unique biologically relevant redox couple, EuII/III, that distinguishes this metal for use in hypoxia imaging. To that end, we investigated a strategy to enhance the contrast‐enhancing capabilities of EuII‐based cryptates in magnetic resonance imaging by controlling
用于磁共振成像的金属造影剂为缺氧成像提供了一种有前景的途径。基于Eu II的造影剂具有独特的生物相关氧化还原对,Eu II/III,使这种金属在缺氧成像中脱颖而出。为此,我们研究了一种通过控制旋转动力学来增强基于 Eu II的穴状化合物在磁共振成像中的对比度增强能力的策略。合成了两种含 Eu II 的二金属穴状化合物,以测试刚性与柔性耦合策略的功效。灵活的二聚化策略导致每个 Eu 离子(60 MHz,298 K)的对比度增强适度增加(114%),但刚性连接策略导致对比度增强显着增加(186%),尽管该化合物的两种双金属配合物中分子量较小的。我们预计刚性连接策略将在未来用于磁共振成像的强效 Eu II造影剂的设计中发挥作用。