Citation: WANG Li-Xia, JIANG Wen, LIN Chao-Ping, ZHONG Qiao-Xia, PANG Jie. Studies on the Hydrogen Bonding Network Structures of Amino-konjacglucomannan-zinc Chelate[J]. Chinese Journal of Structural Chemistry, ;2014, 33(2): 171-178. shu

Studies on the Hydrogen Bonding Network Structures of Amino-konjacglucomannan-zinc Chelate

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a College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
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b Department of Biology Science and Technology, Minnan Normal University, Zhangzhou 363000, China;
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c College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China

Corresponding author: PANG Jie,
Received Date: 18 December 2012
Available Online: 8 November 2013
Fund Project: Sponsored by National Natural Science Foundation of China (31271837) (31271837)jointly sponsored by the special scientific research fund for the doctor discipline point of universities by the Ministry of Education (20113515110010) (JA11167)

Amino-Konjacglucomannan (NH₂-KGM) was prepared through the reaction of ammonium hydroxide with KGM by ultrasonic. The influence of amount of ammonium hydroxide, concentration of KGM and ultrasonic time on the extent of amination was studied. Then, NH₂-KGM and zinc sulfate were used as materials for the preparation of NH₂-KGM-Zn complex. The results indicated that the extent of amination increases with increasing the ammonium hydroxide. The optimum concentration of KGM and ultrasonic time are 0.3% and 75 min respectively. IR showed KGM is successfully aminated and NH₂-KGM forms stable complex with zinc(Ⅱ). The hydrogen bonding network structures of NH₂-KGM-Zn are more stable and the key linking points of hydrogen bonding network are at the OH(6) and O(3) positions of mannose and OH(2) of glucose and O(3) of mannose on the KGM ring. It is more favorable for NH₂-KGM-Zn to form intermolecular hydrogen bonds between KGM.
- Konjac glucomannan (KGM),
- aminated,
- ultrasonic,
- zinc sulfate,
- chelate
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