光谱学与光谱分析 |
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Spectroscopic Study the Interaction of Cucurbit[n]urils with 1-Naphthol, 2-Naphthol |
WANG Ya1,2, MU Lan1*, XUE Sai-feng1, TAO Zhu1, ZHU Qian-jiang1 |
1.College of Science, Guizhou University, Guiyang 550025, China 2.College of Life Sciences, Guizhou University, Guiyang 550025, China |
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Abstract Interaction of cucurbit[n]urils with two naphthol isomers and the influence of pH on the interaction were studied by using UV-Vis spectroscopy and fluorescence spectrophotometry. The experimental results revealed that cucurbit[8]urils always forms a 1∶1 complex with the naphthol isomers. However, UV-Vis spectroscopy and fluorescence spectrophotometry method showed no obvious interaction of cucurbit[6]urils and cucurbit[7]urils with naphthol isomers in all pH values. Formation constant of Kf was found to be 4.2×104 L·mol-1,1.6×104 L·mol-1 of 1-naphthol and 2-naphthol with cucurbit[8]urils respectively by using fluorescence spectrophotometry. Formation constant of Kf was found to be 4.2×104 L·mol-1,5.4×104 L·mol-1 of 1-naphthol and 2-naphthol with cucurbit[8]urils respectively by using UV-Vis spectroscopy. There is no interaction between cucurbit[8]urils and the naphthol isomers in strong alkalescent medium. The cucurbit[8]urils could include the guest with a 1∶1 ratio in acid and neutral medium.
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Received: 2006-05-22
Accepted: 2006-08-28
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Corresponding Authors:
MU Lan
E-mail: sci.lmou@gzu.edu.cn
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Cite this article: |
WANG Ya,MU Lan,XUE Sai-feng, et al. Spectroscopic Study the Interaction of Cucurbit[n]urils with 1-Naphthol, 2-Naphthol[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(09): 1820-1825.
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URL: |
https://www.gpxygpfx.com/EN/Y2007/V27/I09/1820 |
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