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Citation: DANG Zheng, SONG Le-Xin, PAN Shu-Zhen. WANG Mang, . Preparation, Spectral Properties and Decomposition Behavior of a Novel β-Cyclodextrin and Sodium Arsenite Adduct Formed by Stirring[J]. Acta Physico-Chimica Sinica, ;2009, 25(06): 1059-1064. doi: 10.3866/PKU.WHXB20090529 shu

Preparation, Spectral Properties and Decomposition Behavior of a Novel β-Cyclodextrin and Sodium Arsenite Adduct Formed by Stirring

1.
Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China

Corresponding author: ,
Received Date: 6 January 2009
Available Online: 23 March 2009

We report on the formation of a molecule-ion adduct of β-cyclodextrin (β-CD) with sodium arsenite (SA) both in solid state and in aqueous solution. The adduct was characterized using Fourier transforminfrared spectroscopy, powder X-ray diffraction, differential thermogravimetric analysis, gas chromatography coupled to time-of-flight mass spectrometry, UV-Vis spectroscopy, 1H nuclear magnetic resonance titration and electrospray ionization mass spectroscopy. We found that a weak molecule-ion interaction was responsible for the difference in spectral properties in solid state and in aqueous solution as well as for the difference in thermal decomposition behavior between β-CD, SA and the adduct. The novelty and complexity of this interesting molecule-ion interaction was revealed by a redox reaction based on the data of gas chromatograph coupled to time-of-flight mass spectrometer and by the formation of the 1:1 (molar ratio) supramolecular ion complex, Na+-β-CD, based on its electrospray ionization mass spectrum.
- β-Cyclodextrin,
- Sodium arsenite,
- Adduct,
- Molecule-ion interaction,
- Inorganic drug
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