HOST-GUEST COMPLEXES OF CUCURBITURIL WITH THE 4-METHYLBENZYLAMMONIUM ION, ALKALI-METAL CATIONS AND NH4+
HOST-GUEST COMPLEXES OF CUCURBITURIL WITH THE 4-METHYLBENZYLAMMONIUM ION, ALKALI-METAL CATIONS AND NH4+
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DOI：
10.1039/ft9949001507
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发表时间：
1994-06-07
期刊：
影响因子：
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通讯作者：
BUSCHMANN, HJ
中科院分区：
文献类型：
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作者：
HOFFMANN, R;KNOCHE, W;BUSCHMANN, HJ
动力学测量表明存在两种不同的复合物的葫芦脲与4-甲基苄基铵离子：（i）的缔合复合物，其中铵基团结合到葫芦脲的极性门户之一，疏水部分延伸到溶剂中，和（ii）包合复合物，其中疏水部分延伸到葫芦脲的空腔。该复合物用作简单单价阳离子与葫芦脲结合的指示剂。报道了葫芦脲与不同阳离子的1：1络合物的稳定常数。
Kinetic measurements indicate the existence of two different complexes of cucurbituril with 4-methylbenzyl-ammonium ions: (i) an association complex, where the ammonium group binds to one of the polar portals of cucurbituril and the hydrophobic part extends into the solvent, and (ii) an inclusion complex, where the hydrophobic part extends into the cavity of cucurbituril. This complex is used as an indicator for the binding of simple monovalent cations to cucurbituril. Stability constants are reported for the 1:1 complexes of cucurbituril with different cations.