Di-Pyridine-Containing Macrocyclic Triamide Fe(II) and Ni(II) Complexes as ParaCEST Agents
作者:Rabindra N. Pradhan、Pietro Irrera、Feriel Romdhane、Suvam Kumar Panda、Dario Livio Longo、Julia Torres、Carlos Kremer、Anshul Assaiya、Janesh Kumar、Akhilesh K. Singh
DOI:10.1021/acs.inorgchem.2c02242
日期:2022.10.24
complex with five coordinated nitrogen atoms from the macrocyclic ring and two coordinated oxygen atoms from two amide pendant arms. The [Ni(DETA)]·Cl2·2H2O complex was six-coordinated in nature with a distorted octahedral geometry. Four coordinated nitrogen atoms were from the macrocyclic ring, and two coordinated oxygen atoms were from two amide pendant arms. [Fe(DETA)]2+ exhibited well-resolved sharp
Fe(II) 和 Ni(II) paraCEST 造影剂含有二吡啶大环配体 2,2',2"-(3,7,10-triaza-1,5(2,6)-dipyridinacycloundecaphane-3,7本文报道了 ,10-三基)三乙酰胺 (DETA)。[Fe(DETA)] 2+和[Ni(DETA)] 2+配合物都进行了结构表征。晶体学数据揭示了[Fe(DETA)]·(BF 4 ) 2 ·MeCN 配合物的七配位扭曲五角双锥几何结构,其中五个配位氮原子来自大环,两个配位氧原子来自两个酰胺侧臂。[Ni(DETA)]·Cl 2 ·2H 2O 复合体本质上是六配位的,具有扭曲的八面体几何形状。四个配位的氮原子来自大环,两个配位的氧原子来自两个酰胺侧臂。[Fe(DETA)] 2+表现出很好分辨的尖锐质子共振,而在[Ni(DETA)] 2+的情况下,由于电子弛豫时间长,观察到非常宽的质子共振。[Fe(DETA)]