Solution extraction of transition and post-transition heavy and precious metals by chelate and macrocyclic ligands

Extraction of short-lived zirconium and hafnium isotopes using crown ethers: A model system for the study of rutherfordium

“…The coordination chemistry of macrocyclic ligands, especially between crown ethers and alkali and alkaline earth metals has been studied in depth (see [7] for a review), and these ligands are commonly applied to the separation of various metal ions (see [8] for a review).…”

Pyrrole Azocrown Ethers. Synthesis, Complexation, Selective Lead Transport and Ion-Selective Membrane Electrode Studies

“…Previously macrocycle mediated transport experiments [14] have had as their focus silver/lead discrimination -metals that occur together in nature [15,16]. From an environmental point of view ideally Zn 2+ should not compete with the removal of Pb 2+ (or Cd 2+ ) [17].…”

Synthesis of 4-Nitro- and 4-Aminophenylazacrown Ethers

“…[1][2][3][4][5] Aza-crown compounds also find use as chemicals for biochemical studies and as building blocks for supramolecular systems. [6][7][8] Currently there are quite a number of diverse synthetic procedures that lead to aza-macroheterocyclic compounds.…”