Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (1): 122-126.doi: 10.3969/j.issn.1000-565X.2013.01.020

• Food Science & Technology • Previous Articles     Next Articles

Thermodynamic Characteristics and Antibacterial Properties of MaltolComplexes with Fe3+ and Zn2+

Wang Zhong-he1 Wang Jun2 Xue Xiao-li1 Yu Shu-juan1   

  1. 1. School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong, China;2. Department of Biology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
  • Received:2012-05-03 Revised:2012-06-22 Online:2013-01-25 Published:2012-12-03
  • Contact: 于淑娟(1955-),女,教授,博士生导师,主要从事糖品工程与糖类衍生物研究. E-mail:sjyscut@hotmail.com
  • About author:王忠合(1980-),男,博士生,讲师,主要从事美拉德反应产物及其配位特性研究.E-mail:lukewang1980@163.com
  • Supported by:

    国家自然科学基金资助项目(31071564);广东省自然科学基金资助项目(10251064101000014);华南理工大学中央高校基本科研业务费专项资金资助项目(2011ZP009)

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Abstract:

Maltol complexes with zinc and iron were synthesized via the hydrothermal method, and the thermody-namic characteristics as well as antibacterial properties of the products were investigated by means of electronicspectroscopy, DSC and pour plate method. The results show that the coordination reaction between maltol andFe(Ⅲ) or Zn(Ⅱ) influences the absorption peak at 320nm and results in a 20-or 45-nm blue shift of the elec-tronic spectrum, which confirm the occurrence of the coordination reaction. DSC results indicate that the two com-plexes both have one narrow exothermic peak with the peak value of 293.9 and 143.9℃, respectively, and that theenthalpy values calculated from the DSC curves are respectively about 122.8 and 374.6 J/ g, which means thatmaltol-Fe is more stable than maltol-Zn. Moreover, the results obtained by pour plate method and optical densitymethod show that maltol-Fe is of more excellent antibacterial property in the order of Micrococcus luteus>Escherichiacoli>Bacillus subtilis >Staphylococcus aureus. The possible antibacterial mechanism of the complexes is also dis-cussed in the end.

Key words: maltol, metal complex, electronic spectrum, thermodynamic characteristic, antibacterium

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