[2C01-03] Aqueous Separation and Aanalytical Technique 2

[2C01] Development of preorganized planar pentadentate ligand for uranium recovery from seawater

*Ryuto Nabata¹, Satoru Tsushima^1,2, Koichiro Takao¹ (1. Tokyo Tech, 2. HZDR)

Keywords:Uranium-recovery from seawater, preorganized ligand, molecular design

Uranium in seawater attracts special attention as a sustainable resource of nuclear fuel materials. However, it is extremely diluted at 3.3 ppb, so that the development of ligands with high selectivity and high stability constants in complexation with U is much required. In this study, we developed preorganized planar pentadentate ligands to minimize reorientation energy, and synthesized their uranyl complexes.