| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | 3,9,15,21-tetratert-butyl-40,41-dimethoxy-25,28,31,34,37-pentaoxahexacyclo[21.15.1.17,11.113,17.05,38.019,24]hentetraconta-1(38),2,4,7(41),8,10,13,15,17(40),19,21,23-dodecaene | 133494-38-9 | C54H74O7 | 835.177 | 
| —— | 5,11,17,23-tetra-tert-butyl-25,26-dihydroxy-27,28-bis(methyloxy)calix[4]arene | 126109-82-8 | C46H60O4 | 676.98 | 
| —— | 5,11,17,23-tetra(tert-butyl)-25,26,27,28-tetramethoxycalix[4]arene | 203874-24-2 | C48H64O4 | 705.034 | 
| —— | 5,11,17,23-tetra-t-butyl-25,26,27,28-tetrahydroxycalix-4-arene | 288302-12-5 | C44H56O4 | 648.926 | 
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,26,27,28-biscrown-5-calix<4>arene | 133494-40-3 | C60H84O10 | 965.321 | 
| —— | 3-propoxy-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871233-37-3 | C55H76O7 | 849.204 | 
| —— | 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,26-bis(carboxymethoxy)calix[4]arene-crown-5 | 909729-71-1 | C56H74O11 | 923.197 | 
| —— | 3-[(carboxymethyl)oxy]-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871344-17-1 | C54H72O9 | 865.16 | 
| —— | 3-[(carboxymethyl)oxy]-4-propoxy-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871344-22-8 | C57H78O9 | 907.241 | 
| —— | 3-{[(ethoxycarbonyl)methyl]oxy}-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871344-16-0 | C56H76O9 | 893.214 | 
| —— | 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,26-bis[(ethoxycarbonyl)methoxy]calix[4]arene-crown-5 | 909729-69-7 | C60H82O11 | 979.304 | 
| —— | 3-{[(ethoxycarbonyl)methyl]oxy}-4-propoxy-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871360-29-1 | C59H82O9 | 935.295 | 
| —— | 3-[(carboxymethyl)oxy]-4-benzyloxy-p-tert-butylcalix[4]arene-(1,2)-crown-5 | 871344-23-9 | C61H78O9 | 955.285 | 
| —— | methyl 3-[2-[(3,9,15,21-tetratert-butyl-41-hydroxy-25,28,31,34,37-pentaoxahexacyclo[21.15.1.17,11.113,17.05,38.019,24]hentetraconta-1,3,5(38),7(41),8,10,13(40),14,16,19,21,23-dodecaen-40-yl)oxy]ethoxy]naphthalene-2-carboxylate | 865481-02-3 | C66H82O10 | 1035.37 | 
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.