瓜环与喹啉及其衍生物的相互作用

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Abstract The structures and fluorescence characteristics of cucurbit[n=6-8]urils with quinoline, isoquinoline and 7-methyl quinoline have been investigated by fluorescence spectrophotometry.Compared to NMR techniques, the fluorometric analysis method revealed that there are not only obvious interactions of quinoline or its derivates and cucurbit[7]uril, but also interactions of quinoline or its derivates and cucurbit[6]uril or cucurbit[8]uril which can not be observed by using ¹H NMR technique.The experimental results also revealed that quinoline, isoquinoline and 7-methyl quinoline were included by cucurbit[6-8]uril with different ratios.There could be three kinds of interactions of cucurbit[n]urils and the guests: a) cavity interaction, including hydrophobic forces and Van der Waals contact forces between macrocycles and cages; b) portals ion-dipole interaction, or electrostatic interaction of the positive charge of the guests and the carbonyl groups at the portals of cucurbit[n]uril; c)size interaction which requires the size of the guest matching a cucurbit[n]uril.

Key words：Cucurbit[n]urils;Quinoline and its derivates;Fluorescence spectrophotometry;¹H NMR technique;Inclusion complexes

Received: 2004-08-26 Accepted: 2005-01-15

ZTFLH:

O641.4

Corresponding Authors: XUE Sai-feng

Cite this article:

DU Ying,XUE Sai-feng,MU Lan, et al. Interaction of Cucurbit[n]urils and Quinoline or Its Derivates [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(08): 1281-1285.

URL:

https://www.gpxygpfx.com/EN/Y2005/V25/I08/1281

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