已经合成了在上边缘含有二茂铁酰胺并且在下边缘(5a,5b和5c)含有甲氧基或乙氧基羰基甲氧基(乙酯)基团的杯[4]芳烃。发现四甲氧基5a和二甲氧基二乙酯5c在构象上不稳定,并且在溶液中以锥和部分锥构型存在。阴离子结合由研究1个在CDCl 1 H NMR滴定3表明图5B的约束氯-选择性地与高稳定性。化合物5c中形成有Cl络合物-和H 2 PO 4 -前者更稳定。锥体在化合物局部锥形构象的比例5a中被发现在结合氯降低-和H 2 PO 4 -和在极性溶剂中。
Lower rim tetra-substituted and upper rim ferrocene amide calix[4]arenes: synthesis, conformation and anion-binding properties
作者:Boosayarat Tomapatanaget、Thawatchai Tuntulani
DOI:10.1016/s0040-4039(01)01722-1
日期:2001.11
Calix[4]arenes containing ferrocene amide at the upper rim and methoxy or ethoxycarbonylmethoxy (ethyl ester) groups at the lowerrim (5a, 5b and 5c) have been synthesized. It was found that tetramethoxy 5a and dimethoxy diethyl ester 5c were conformationally labile and existed in both cone and partial coneconformation in solution. Anion-binding studies by 1H NMR titration in CDCl3 showed that 5b
已经合成了在上边缘含有二茂铁酰胺并且在下边缘(5a,5b和5c)含有甲氧基或乙氧基羰基甲氧基(乙酯)基团的杯[4]芳烃。发现四甲氧基5a和二甲氧基二乙酯5c在构象上不稳定,并且在溶液中以锥和部分锥构型存在。阴离子结合由研究1个在CDCl 1 H NMR滴定3表明图5B的约束氯-选择性地与高稳定性。化合物5c中形成有Cl络合物-和H 2 PO 4 -前者更稳定。锥体在化合物局部锥形构象的比例5a中被发现在结合氯降低-和H 2 PO 4 -和在极性溶剂中。
Calix[4]arenes Containing Ferrocene Amide as Carboxylate Anion Receptors and Sensors
Calix[4]arene derivatives containingamideferrocene units at the wide rim and ethyl ester groups at the narrow rim, L1-L3, were synthesized and their anion binding and sensing properties were investigated. It was found from (1)H NMR titrations that L1-L3 were able to bind selectively with carboxylate anions. Moreover, cyclic voltammetry and square wave voltammetry showed that L1-L3 were able to act