Cyclo[6]aramide-Tropylium Charge Transfer Complex as a Colorimetric Chemosensor for Differentiation of Intimate and Loose Ion Pairs

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• 作者：Long Chen ; Zhiyong Peng ; Shuo Liu ; Xiaowei Li ; Rongzhou Chen ; Yi Ren ; Wen Feng ; Lihua Yuan
• 刊名：Organic Letters
• 出版年：2015
• 出版时间：December 18, 2015
• 年：2015
• 卷：17
• 期：24
• 页码：5950-5953
• 全文大小：350K
• ISSN：1523-7052

文摘

Shape-persistent iso-C₁₆-cyclo[6]aramide (1) was found to form a charge-transfer (CT) complex with aromatic carbonium tropylium (Tr⁺). The resulting CT complex was evidenced by both experimental results and theoretical calculations. Particularly, dibutylammonium salt with PF₆^{鈥?/sup> as the counterion can extrude Tr+ from the CT complex, but it cannot do so with Cl鈥?/sup>, thereby offering a visual approach to identify organic intimate ion pairs and loose ion pairs.}