Complexation of Triptycene-Derived Macrotricyclic Polyether with Paraquat Derivatives, Diquat, and a 2,7-Diazapyrenium Salt: Guest-Induced Conformational Changes of the Host

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• 作者：Ying Han ; Jing Cao ; Peng-Fei Li ; Qian-Shou Zong ; Jian-Min Zhao ; Jia-Bin Guo ; Jun-Feng Xiang ; Chuan-Feng Chen
• 刊名：The Journal of Organic Chemistry
• 出版年：2013
• 出版时间：April 5, 2013
• 年：2013
• 卷：78
• 期：7
• 页码：3235-3242
• 全文大小：425K
• 年卷期：v.78,no.7(April 5, 2013)
• ISSN：1520-6904

文摘

Complexation between a triptycene-derived macrotricyclic polyether containing two dibenzo-[30]-crown-10 cavities and different functionalized paraquat derivatives, diquat, and a 2,7-diazapyrenium salt in both solution and solid state was investigated in detail. It was found that depending on the guests with different terminal functional groups and structures, the macrotricyclic polyether could form 1:1 or 1:2 complexes with the guests in different complexation modes in solution and also in the solid state. Especially, the conformation of the macrotricyclic polyether was efficiently adjusted by the encapsulated guests, which was to some extent similar to substrate-induced fit of enzymes. Moreover, the binding and releasing of the guests in the complexes could be controlled by potassium ions.