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Ion Transfer of Reduced Keggin‐Type Heteropolymolybdate Anions at the Nitrobenzene/Water Interface and Its Relevance to Their Antitumoral Activities
Author(s) -
Ding Jie,
Osakai Toshiyuki
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200104)13:5<384::aid-elan384>3.0.co;2-r
Subject(s) - nitrobenzene , chemistry , cyclic voltammetry , ion , proton , electron transfer , aqueous solution , voltammetry , inorganic chemistry , ionic bonding , protonation , ionic strength , electrochemistry , electrode , catalysis , organic chemistry , physics , quantum mechanics
The transfer of two‐electron reduced Keggin anions (α‐ and β‐[PMo V 2 Mo VI 10 O 40 ] 5– and α‐[SiMo 2 V Mo 10 VI O 40 ] 6– ) across the nitrobenzene/water interface was studied by cyclic voltammetry. Based on measurements of the ion‐transfer potential at various pHs, ionic distribution diagrams were prepared. It was found that the polyanion transfer was usually accompanied by the proton transfer. To confirm the validity of the distribution diagrams, the theoretical simulation of normal‐pulse voltammograms was also performed. The ion‐transfer potentials of some Keggin‐type heteropolymolybdate anions at a physiological pH (7.0) showed an excellent correlation with their antitumoral activities, suggesting a crucial role of their stability in the aqueous solution.