NITROGEN-RICH MACROCYCLIC LIGANDS, CHELATION COMPLEXES THEREOF, AND PROCESS FOR SELECTIVE CHELATION OF RADIOACTIVE BISMUTH IONS WITH THE LIGANDS
申请人:Los Alamos National Security, LLC
公开号:US20150344508A1
公开(公告)日:2015-12-03
Selective chelation of bismuth radionuclide ions from a mixture including actinium radionuclide ions involves exposing a ligand to an aqueous solution that includes bismuth radionuclide ions and actinium radionuclide ions under conditions whereby the bismuth radionuclide ions selectively chelate to the ligand for form cationic complexes of the bismuth radionuclide ions. and separating the cationic complexes of the bismuth radionuclide ions from the actinium radionuclide ions. The ligands have a structure based on a 12-membered cyclen ring and may include pendant functional groups that can be derivatized with biological targeting vectors for targeted alpha therapy.
Nitrogen-rich macrocyclic ligands, chelation complexes thereof, and process for selective chelation of radioactive bismuth ions with the ligands
申请人:Los Alamos National Security, LLC
公开号:US10450336B2
公开(公告)日:2019-10-22
Selective chelation of bismuth radionuclide ions from a mixture including actinium radionuclide ions involves exposing a ligand to an aqueous solution that includes bismuth radionuclide ions and actinium radionuclide ions under conditions whereby the bismuth radionuclide ions selectively chelate to the ligand for form cationic complexes of the bismuth radionuclide ions. and separating the cationic complexes of the bismuth radionuclide ions from the actinium radionuclide ions. The ligands have a structure based on a 12-membered cyclen ring and may include pendant functional groups that can be derivatized with biological targeting vectors for targeted alpha therapy.
Asymmetric Twisting and Chirality Probing Properties of Quadruple-Stranded Helicates: Coordination Versatility and Chirality Response of Na<sup>+</sup>, Ca<sup>2+</sup>, and La<sup>3+</sup> Complexes with Octadentate Cyclen Ligand
cyclen ligand were prepared and structurally characterized in the crystal and solution states. The employed cyclen ligand formed 6-, 7-, and 9-coordinated, crystalline complexes with Na+, Ca2+, and La3+ cations, respectively, in which the parent cyclen ring and quinoline-functionalized side arms were cooperatively coordinated. These three metal cations provided the quadruple-stranded helicates in CH3CN-C2H5OH