摘要
The data of 1H nuclear magnetic resonance and molar conductivity prove that there is a molecule-ion interaction between a-cyclodextrin （a-CD） and sodium arsenite （SA）, and the interaction site is different from that between β-CD and SA. The packing mode of a-CD molecules after adduct with SA is changed from cage to channel type. Several experimental phenomena from thermogravimetric analyses and gas chromatography coupled to time-of-flight mass spectrometry measurements reveal that the presence of SA has led to a large change of thermal decomposition behavior of a-CD, and vice versa. The current work reveals the particularity of the interaction between SA and a-CD, which would provide new insight into the understanding of molecule-ion interactions.
The data of 1H nuclear magnetic resonance and molar conductivity prove that there is a molecule-ion interaction between a-cyclodextrin （a-CD） and sodium arsenite （SA）, and the interaction site is different from that between β-CD and SA. The packing mode of a-CD molecules after adduct with SA is changed from cage to channel type. Several experimental phenomena from thermogravimetric analyses and gas chromatography coupled to time-of-flight mass spectrometry measurements reveal that the presence of SA has led to a large change of thermal decomposition behavior of a-CD, and vice versa. The current work reveals the particularity of the interaction between SA and a-CD, which would provide new insight into the understanding of molecule-ion interactions.
基金
Project supported by the National Natural Science foundation of China （No. 21071139） and the Natural Science Foundation of Anhui Province （No. 090416228）.
