Synthesis, characterization and relaxivity validations of Gd(III) complex of DOTA tetrahydrazide as MRI contrast agent
作者:Divya Rajendran、Judith Elizabeth、Sundar Manoharan、Nagabhushan Vellala、Brahmadathan Kootallur、Prince Makarios Paul、Abiram Angamuthu、Jebasingh Bhagavathsingh
DOI:10.1016/j.molstruc.2022.132474
日期:2022.5
moieties. The corresponding Gd(III) complex was prepared in an aqueous medium with the adjustment of pH to 7.0. The Gd(III)L1 complex shows the longitudinal relaxivity of 4.9 mM−1s−1 and transverse relaxivity of 6.2 mM−1s−1 at 37 ⁰C. The as-prepared complex Gd(III)L1 displays the enhanced intensity of T1 weighted phantom MR images with various concentrations at 7.0 T MRI scanner, which pave the way
我们报告了一种新的 (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl)tetra(acetohydrazide) (Gd(III)L1) 的钆 (III) 配合物作为高分辨率的潜在造影剂MRI中的图像及其通过DFT计算的分子结构预测。DOTA 四酰肼配体骨架 (L1) 是通过 1,4,7,10-四氮杂环十二烷 (cyclen) 与共轭t-丁基氨基甲酸酯的溴代衍生物反应合成的,然后裂解 Boc 部分。在水性介质中制备相应的 Gd(III) 配合物,并将 pH 值调节至 7.0。Gd(III)L1 复合物显示出 4.9 mM -1 s -1的纵向弛豫和 6.2 mM -1 s -1的横向弛豫在 37 ⁰C。所制备的复合物 Gd(III)L1 在 7.0 T MRI 扫描仪上显示了不同浓度的 T1 加权幻像 MR 图像的增强强度,这为在 MRI 中获得更高分辨率图像铺平了道路。