中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 25,27-di-(methoxycarbonylmethoxy)-26,28-dihydroxycalix[4]arene | 194988-95-9 | C34H32O8 | 568.623 |
—— | 25,27-bis[(ethoxycarbonyl)methoxy]-26,28-dihydroxycalix[4]arene | 142267-55-8 | C36H36O8 | 596.677 |
杯[4]芳烃 | 25,26,27,28-tetrakis(hydroxy)calix[4]arene | 74568-07-3 | C28H24O4 | 424.496 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 37,38-Dipropoxy-19,28-dioxa-22,25-diazahexacyclo[15.12.7.17,11.131,35.05,29.013,18]octatriaconta-1(29),2,4,7(38),8,10,13,15,17,31(37),32,34-dodecaene-21,26-dione | 464195-58-2 | C40H44N2O6 | 648.799 |
—— | Ethyl 2-[[38-(2-ethoxy-2-oxoethoxy)-21,26-dioxo-19,28-dioxa-22,25-diazahexacyclo[15.12.7.17,11.131,35.05,29.013,18]octatriaconta-1(29),2,4,7(38),8,10,13,15,17,31(37),32,34-dodecaen-37-yl]oxy]acetate | 194229-11-3 | C42H44N2O10 | 736.819 |
A series of new calix[4]arene(amidocrown) diquinones (3a–3d) have been synthesized, characterized, and evaluated for cation recognition. It has been observed that 3b interacts with alkali metal ions (Li+, Na+, and K+) and ammonium ions to induce an unprecedented downfield shift in the NH proton resonance, which can be attributed to polarization of the amidocrown ring of the calix[4]arene diquinone receptor. The observation has been confirmed by a significant anodic shift (Li+ > NH4+ > Na+> K+) of the corresponding amidocrown-diquinone redox couple in cyclic and square wave voltammetric experiments. Both NMR and electrochemical studies of the binding characteristics of 3b with alkali metal cations and ammonium ions revealed a 1:1 binding stoichiometry for all and exhibited the highest association constant for lithium ions. This indicated that the receptor 3b selectively binds the lithium ion in preference to other alkali metal cations and ammonium ions.