Abstract
Inclusion complex of Orange II with β-Cyclodextrin (β-CD) and the anti-photolysis effect under UV-light were investigated. The molar ratio of inclusion complex of β-Cyclodextrin and Orange II is 1∶1. The formation constantK = 1.236×103 L/mol was determined by the UV and Fluorescence spectra respectively, which was quite in accordance with the calculation with a modified Benesi-Hildbrand equation. The inclusion complex was characterized by the IR spectra and the molar ratio of inclusion complex is 1∶1 too. The formation constantK = 1.266×103 L/mol was determined by1H NMR analysis and was nearly the same by UV and fluorescence spectra. The photocatalytic decolorization rate of Orange II solutions containing β-CD and TiO2 was smaller by 51.9% than that of the Orange II solutions only containing TiO2, while in the case of direct photolysis of Orange II solutions, β-CD can lower the photolysis rate by 48.1% under UV-light. This result indicates β-CD can inhibit the photolysis and photocatalytic decolorization of Orange II under UV-light. The β-CD inclusion complex was found to be persistent to UV-light photolysis.
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Foundation item: Supported by the National Natural Science Foundation of China (20177017)
Biography: Lu Ping (1958), male. Associate professor, research direction: environmental photochemistry.
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Ping, L., Bin, L., Zhe, Z. et al. Formation of the inclusion complex of Orange II with β-Cyclodextrin and its photostability. Wuhan Univ. J. Nat. Sci. 8, 1147–1152 (2003). https://doi.org/10.1007/BF02903689
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DOI: https://doi.org/10.1007/BF02903689