146630-92-4Relevant academic research and scientific papers
Lithium selective ionophores based on pendant arm substituted crown ethers
Faulkner, Stephen,Kataky, Ritu,Parker, David,Teasdale, Andrew
, p. 1761 - 1770 (2007/10/02)
Ligands have been synthesised which offer good selectivity for lithium ions over sodium based on substituted 14-crown-4 derivatives which bear diamide groups on the ethylene chain or, less effectively, on the central carbon of the propylene chain.The behaviour of potentiometric membrane electrodes based on these ionophores is compared.
Synthesis of Substituted 14-Crown-4 Compounds
Czech, Bronislaw P.,Zazulak, Wolodymyr,Kumar, Anand,Olsher, Uriel,Feinberg, Hadar,et al.
, p. 1389 - 1400 (2007/10/02)
Seventeen new substituted 14-crown-4 derivatives 3-10, 35-40, 42, 45 and 46 are described.A series of nine compounds 2-10 with two, three or four substituents in the 6- and/or 13-positions was synthesized in good yields from the appropriate diols and ditosylates using improved cyclization conditions.The solid state structures of 6,6,13,13-tetra(benzyloxymethyl)-14-crown-4 (8) and lithium thiocyanate complexes of trans- and cis-6,13-bis(spiro-2,2-dichlorocyclopropyl)-14-crown-4 (45) and (46), respectively, have been determined.
