Formation and characterization of furfuryl mercaptan-β-cyclodextrin inclusion complex and its thermal release characteristics

Zhu, Guangyong; Xiao, Zuobing; Yu, Gengfa; Zhu, Guangxu; Niu, Yunwei; Liu, Junhua

doi:10.2478/pjct-2021-0035

Abstract

Furfuryl mercaptan has the aroma characteristics of coffee. However, it is unstable during storage of coffee brew and roasted coffee. In order to enhance the stability of furfuryl mercaptan, furfuryl mercaptan-β-cyclodextrin inclusion complex was synthesized using the precipitation method in this work. Fourier transform infrared spectroscopy, x-ray diffraction, and thermogravimetric analysis (TG) were used to characterize the resulting products. The interaction of furfuryl mercaptan with β-cyclodextrin was investigated by the molecular mechanics (MM) method. These changes in FTIR and XRD gave supporting evidence for the successful formation of furfuryl mercaptan-β-cyclodextrin inclusion complex. The TG results showed that the formation of furfuryl mercaptan-β-cyclodextrin inclusion complex could improve the thermal stability of furfuryl mercaptan and provide a long-lasting effect. The structure of furfuryl mercaptan-β-cyclodextrin inclusion complex with the minimum energy was obtained by MM2 calculation, and the minimum binding energy was –77.0 kJ mol⁻¹ at –1.96 × 10^{–10 m}.

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Formation and characterization of furfuryl mercaptan-β-cyclodextrin inclusion complex and its thermal release characteristics

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