Ionic pseudopolyrotaxanes bearing a chromophore in the side chain – A spectroscopic study in water

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• 作者：Ulrich Oertel ; Hartmut Komber ; Andrey V. Tenkovtsev ; Marina M. Dudkina ; Andrey E. Trofimov ; Frank Bö ; hme
• 关键词：Pseudopolyrotaxane ; Ionic complex ; Inclusion complex
• 刊名：Polymer
• 出版年：2009
• 出版时间：27 November 2009
• 年：2009
• 卷：50
• 期：25
• 页码：5876-5883
• 全文大小：369 K

文摘

The formation of pseudopolyrotaxanes based on a polyelectrolyte, a surfactant and α-cyclodextrin (α-CD) in aqueous solution is investigated. The polyelectrolyte and the surfactant form an ionic complex the side chains of which interact with each other. These interactions are strongly influenced by the formation of inclusion complexes with α-CD. It is shown by ¹H NMR and UV–vis spectroscopy that threading of the α-CD rings onto the side chains causes a shielding effect which increases the mobility of the side chains. The structure of the pseudopolyrotaxanes is concluded from ROESY spectra and their stoichiometry is determined by Job plots based on shift effects observed in the ¹H NMR spectra.