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Host properties of cucurbit [7] uril: fluorescence enhancement of acridine orange

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Abstract

The inclusion behavior of cucurbit [7] uril with acridine orange was investigated by fluorescence spectrometry in acetate buffer solution. It was found that the fluorescence intensity of acridine orange regularly increased upon the addition of cucurbit [7] uril accompanying with blue-shift of the position of the emission maximum. The results indicate the formation of the complex at a 1:1 complex stoichiometry and the association constant was calculated by applying a deduced equation. From the temperature dependence of the equilibrium constants, ΔH and ΔS values were obtained, indicating an enthalpic driving force for complexation. Meanwhile, the possible interaction mechanism was also discussed.

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Acknowledgements

The authors thank the financial supports of the National Natural Science Foundation of P. R. China (20575001), the education Commission Natural Science Foundation of Anhui Province (2005KJ017ZD), the foundation of Anhui Normal University for young teacher (2006xqn90) and Program for Innovative Research Team in Anhui Normal University.

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  1. Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, China

    Yunyou Zhou, Huapeng Yu, Li Zhang, Junyong Sun, Lian Wu, Qin Lu & Lun Wang

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  1. Yunyou Zhou
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  2. Huapeng Yu
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Correspondence to Yunyou Zhou.

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Zhou, Y., Yu, H., Zhang, L. et al. Host properties of cucurbit [7] uril: fluorescence enhancement of acridine orange. J Incl Phenom Macrocycl Chem 61, 259–264 (2008). https://doi.org/10.1007/s10847-008-9414-8

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