Why, on interaction of urea-based receptors with fluoride, beautiful colors develop

被引：488

作者：

Esteban-Gómez, D ^{[1
]}

Fabbrizzi, L ^{[1
]}

Licchelli, M ^{[1
]}

机构：

[1] Univ Pavia, Dipartimento Chim Gen, I-27100 Pavia, Italy

来源：

JOURNAL OF ORGANIC CHEMISTRY | 2005年 / 70卷 / 14期

关键词：

D O I：

10.1021/jo050528s

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Urea-based receptors, containing electron-withdrawing chromogenic substituents, in a DMSO solution, in the presence of varying excess of fluoride, do not form H-bond complexes, but undergo stepwise deprotonation of the two N-H fragments, an event which is signaled by the development of vivid colors. Double deprotonation is also observed in the presence of hydroxide. Less basic anions (CH3COO-, H2PO4-) induce deprotonation of only one N-H.

引用

页码：5717 / 5720

页数：4

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