Salt effects on the apparent stability of the cucurbit[7]uril-methyl viologen inclusion complex

被引：213

作者：

Ong, W

Kaifer, AE ^{[1
]}

机构：

[1] Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124 USA

[2] Univ Miami, Dept Chem, Coral Gables, FL 33124 USA

来源：

JOURNAL OF ORGANIC CHEMISTRY | 2004年 / 69卷 / 04期

关键词：

D O I：

10.1021/jo035030+

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The effects of the medium ionic composition on the apparent equilibrium association constant (K) for the formation of a 1:1 inclusion complex between the guest methyl viologen (MV2+) and the host cucurbit[7]uril (CB7) were studied in aqueous solutions. The K values were found to decrease with increasing ionic strength, with more pronounced effects for solutions containing divalent Ca2+ ions than for solutions containing monovalent Na+ ions. The competing ion-dipole interactions between Ca2+ or Na+ and MV2+ ions appear to be responsible for the remarkable modulation of the K values observed in this work.

引用

页码：1383 / 1385

页数：3

共 24 条

[1] Cucurbit[7]uril and o-carborane self-assemble to form a molecular ball bearing [J].