Host-guest interactions in aqueous media withp-tert.-butylcalix[4]arene bearing polyoxyethylene chains |
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Authors: | Youheng Shi Zhihui Zhang |
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Institution: | (1) Institute of Photographic Chemistry, Academia Sinica, 100101 Beijing, China |
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Abstract: | The interactions ofp-tert.-butylcalix4]arene bearing polyoxyethylene chains (C3) with pyrene (Py), 1-anilino-8-naphthalenesulfonate (ANS) andN-phenyl-naphthylamine (NPN) in aqueous solution were studied by absorption and fluorescence measurements. Absorption spectral changes and fluorescence enhancements reveal that C3, which has a hydrophobic cavity, can include organic molecules and ions in aqueous solution and form 1 1 host-guest complexes with ANS and NPN. C3 forms inclusion complexes with Py at different stoichiometries depending on the host: guest molar ratio. Binding constants of 2.2×104, 2.0×104 and 3.6×105 dm3 mol–1 were calculated for the C3 Py, C3 ANS and C3 NPN complexes (1 1), respectively, based on the Benesi-Hildebrand equation.Author for correspondence. |
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Keywords: | p-tert -Butylcalix[4]arene polyoxyethylene chains pyrene 1-anilino-8-naphthal-enesulfonate N-phenylnaphthylamine fluorescence spectroscopy |
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