中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Ethyl 2-[[3,9,15,21-tetratert-butyl-38-(2-ethoxy-2-oxoethoxy)-25,28,31,34-tetraoxahexacyclo[21.12.1.17,11.113,17.05,35.019,24]octatriaconta-1(35),2,4,7(38),8,10,13,15,17(37),19,21,23-dodecaen-37-yl]oxy]acetate | 891847-57-7 | C58H78O10 | 935.251 |
—— | 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,26-dihydroxycalix[4]arene-1,2-crown-4 | 189182-98-7 | C50H66O6 | 763.07 |
—— | 5,11,17,23-tetra-t-butyl-25,26,27,28-tetrahydroxycalix-4-arene | 288302-12-5 | C44H56O4 | 648.926 |
Eight proton di-ionisable diacid conformers of nano-baskets including 25,26-di(carboxymethoxy)calix[4]arene-crown-3, -crown-4, -crown-5 and -crown-6 in the cone conformation have been synthesised and shown to extract lanthanide cations effectively. Their selectivities were greatly influenced by the acidity of the solution and the conformations of the calix-crown. The extraction loading was improved by having the p-tert-butyl-moiety in the upper rim. The scaffold bearing the crown-4 ether moiety showed the least loading, while scaffolds with crown-3- and crown-5-ether moieties had the best selectivities.