Studies on the Inclusion Behavior of Amphiphilic p-Sulfonatocalix[4]arene with Ascorbic Acid by Spectrofluorometric Titrations

• 作者: Dongbao Tang Qin Lu Tao Li Xiaoli Fang Xueping Ding Yunyou Zhou
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 化学
• 关键词: Arene Ascorbic Acid Fluorescence SPECTROMETRY INCLUSION Interaction
• 年，卷（期）: 2011,（2）
• 页码范围: 59-64
• 页数: 6页
• 分类号: O6

摘要

The aqueous solution of tetrabutyl ether derivatives of p-sulfonatocalix[4]arene (SC4Bu) and ascorbic acid (AA) complex has been studied based on fluorescence and 1H NMR spectroscopic results. It was found that the fluorescence intensity of SC4Bu quenched regularly upon the addition of AA. A 1:1 stoichiometry for the complexation was established and was verified by Job’s plot. The temperature-dependent inclusion constants were calculated, form which Δ H and ΔS values were calculated. Meanwhile the proposed interaction mechanism of the inclusion complex was discussed based on 1H NMR results. The various factors (ionic strength, and surfactants) effecting the inclusion process were examined in detail.