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Significant Phenomena Observed in the Molecule‐Ion Adduct System of Sodium Arsenite with α ‐Cyclodextrin
Author(s) -
Dang Zheng,
Song Lexin,
Yang Jun,
Yang Jing
Publication year - 2011
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201190140
Subject(s) - chemistry , adduct , molecule , cyclodextrin , thermogravimetric analysis , arsenite , mass spectrometry , ion , thermal decomposition , molar conductivity , sodium arsenite , inorganic chemistry , chromatography , organic chemistry , arsenic
The data of 1 H nuclear magnetic resonance and molar conductivity prove that there is a molecule‐ion interaction between α ‐cyclodextrin ( α ‐CD) and sodium arsenite (SA), and the interaction site is different from that between β ‐CD and SA. The packing mode of α ‐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 α ‐CD, and vice versa. The current work reveals the particularity of the interaction between SA and α ‐CD, which would provide new insight into the understanding of molecule‐ion interactions.