Abstract
The host–guest interactions of hemicucurbit[6 and 12]urils with the Schiff base guest 1 has been investigated. 1H NMR spectra suggest hemicucurbit[6 and 12]urils bind to guest 1 with the formation of hydrogen bondings between the phenol hydroxyl group and carbonyl groups in the host. The formation of interaction complexes are also supported by fluorescence emission spectroscopy. The moderate association constants of the interaction complexes in a ratio of 1:1 are obtained to be (3.2 ± 0.6) × 105 and (5.5 ± 0.8) × 105 L mol−1, respectively, via non-linear curve fitting, which indicate that the formation of hydrogen bondings are important in the host–guest interactions.
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We acknowledge the financial support of National Natural Science Foundation of China (No. 21662007), the Project of Talent Introduction of Guizhou University (No. (2014)24).
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Jin, XY., Wang, F., Cong, H. et al. Host–guest interactions between hemicucurbiturils and a hydroxyl-substituted Schiff base. J Incl Phenom Macrocycl Chem 86, 249–254 (2016). https://doi.org/10.1007/s10847-016-0659-3
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DOI: https://doi.org/10.1007/s10847-016-0659-3