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Production and pyrolysis characteristics of citral–monochlorotriazinyl-β-cyclodextrin inclusion complex

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Abstract

Encapsulation aims at protecting components, providing controlled release, preventing oxidation and extending the shelf life. The inclusion complex of citral and monochlorotriazinyl-β-cyclodextrin has been studied. The scanning electron microscopy result showed that the dried citral–monochlorotriazinyl-β-cyclodextrin inclusion complexes formed aggregates with many geometric shapes in the size range 1–2 μm, and the transmission electron microscopy result shows that the inclusion complex aggregates were expressed through a bicontinuous “worm-type” pore system. Fourier transform infrared spectroscopy results show that citral enters the cavity of monochlorotriazinyl-β-cyclodextrin. The citral loading capacity determined from thermogravimetric data is about 8.96 %, and a 1:1 stoichiometry is obtained. Pyrolysis characteristics of the inclusion complexes were determined. Geometries of host, guest and the host–guest inclusion complex were optimized using molecular mechanics calculations. The binding energies for the most stable complexes geranial/monochlorotriazinyl-β-cyclodextrin and neral/monochlorotriazinyl-β-cyclodextrin are −143 and −162 kJ mol−1, respectively. The shapes and orientations of those complexes were presented.

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Acknowledgements

This work was financially supported by the National Natural Science Fund of China (21276157, 21476140).

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Authors and Affiliations

  1. Shanghai Institute of Technology, Shanghai, 201418, People’s Republic of China

    Guangyong Zhu, Nienie Feng, Zuobing Xiao, Rujun Zhou & Yunwei Niu

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  1. Guangyong Zhu
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  2. Nienie Feng
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  3. Zuobing Xiao
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  4. Rujun Zhou
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  5. Yunwei Niu
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Correspondence to Zuobing Xiao.

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Zhu, G., Feng, N., Xiao, Z. et al. Production and pyrolysis characteristics of citral–monochlorotriazinyl-β-cyclodextrin inclusion complex. J Therm Anal Calorim 120, 1811–1817 (2015). https://doi.org/10.1007/s10973-015-4498-z

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