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Updated: Aug 19, 2025

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
Dinuclear mono-bridged or polymeric lanthanide complexes from one ligand: structural transformation and chiral
Ran Chen1,2, Qian-Qian Yan1,2, Shao-Jun Hu1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China. qfsun@fjirsm.ac.cn.
Abstract:
We designed and synthesized a semi-rigid bis-tridentate ligand L which could undergo a trans-to-cis conformational transition when coordinated onto lanthanum ions through the rotation of the single bond on the central terphenyl bridge. By adjusting the metal/ligand ratio, a single-ligand bridged dinuclear complex La2L3 and an infinitely extending two-dimensional layered metal organic polymer (La2L2) can be obtained. Through the induction of the chiral auxiliary ligand G, these two achiral assemblies could both be transformed into the chiral mononuclear three-component complex LaLG. In addition, we also realized a linear ee sensing for the auxiliary ligand by induced circular dichroism.
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