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Facilitated Ion‐Transfer of Sodium Cation by (Anthraquinone‐1‐yloxy) methane‐15‐crown‐5 Across the Water/1,2‐Dichloroethane Microinterface
Author(s) -
Han Xiaojun,
Zhang Zhiquan,
Dong Shaojun,
Wang Erkang
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302901
Subject(s) - chemistry , alkali metal , anthraquinone , stoichiometry , sodium , methane , dissociation (chemistry) , inorganic chemistry , dissociation constant , dichloroethane , analytical chemistry (journal) , organic chemistry , solvent , biochemistry , receptor
The transfer of sodium cation facilitated by (anthraquinone‐1‐yloxy) methane‐15‐crown‐5 (L) has been investigated at the water/1,2‐dichloroethane microinterface supported at the tip of a micropipette. The diffusion coefficient of (anthraquinone‐1‐yloxy) methane‐15‐crown‐5 obtained was (3.42±0.20)×10 −6 cm 2 s −1 . The steady‐state voltammograms were observed for forward and backward scans due to sodium ion transfer facilitated by L with 1 : 1 stoichiometry. The mechanism corresponded to an interfacial complexation (TIC) and interfacial dissociation (TID) process. The association constant was calculated to be log β o =11.08±0.03 in the DCE phase. The association constant of other alkali metals (Li + , K + , Rb + ) were also obtained.