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231223s2006 xx ||||| 00| ||eng c |
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|a pubmed25n0538.xml
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|a (NLM)16548608
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|c DE-627
|e rakwb
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|a eng
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|a Gulaboski, Rubin
|e verfasserin
|4 aut
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|a A comparative study of the anion transfer kinetics across a water/nitrobenzene interface by means of electrochemical impedance spectroscopy and square-wave voltammetry at thin organic film-modified electrodes
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|c 2006
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 06.06.2007
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|a Date Revised 21.03.2006
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a The kinetics of the transfer of a series of hydrophilic monovalent anions across the water/nitrobenzene (W/NB) interface has been studied by means of thin organic film-modified electrodes in combination with electrochemical impedance spectroscopy and square-wave voltammetry. The studied ions are Cl-, Br-, I-, ClO4-, NO3-, SCN-, and CH3COO-. The electrode assembly comprises a graphite electrode (GE) covered with a thin NB film containing a neutral strongly hydrophobic redox probe (decamethylferrocene or lutetium bis(tetra-tert-butylphthalocyaninato)) and an organic supporting electrolyte. The modified electrode is immersed in an aqueous solution containing a supporting electrolyte and transferring ions, and used in a conventional three-electrode configuration. Upon oxidation of the redox probe, the overall electrochemical process proceeds as an electron-ion charge-transfer reaction coupling the electron transfer at the GE/NB interface and compensates ion transfer across the W/NB interface. The rate of the ion transfer across the W/NB interface is the limiting step in the kinetics of the overall coupled electron-ion transfer reaction. Moreover, the transferring ion that is initially present in the aqueous phase only at a concentration lower than the redox probe, controls the mass transfer regime in the overall reaction. A rate equation describing the kinetics of the ion transfer that is valid for the conditions at thin organic film-modified electrodes is derived. Kinetic data measured with two electrochemical techniques are in very good agreement
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|a Journal Article
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|a Mirćeski, Valentin
|e verfasserin
|4 aut
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|a Pereira, Carlos M
|e verfasserin
|4 aut
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|a Cordeiro, M Natalia D S
|e verfasserin
|4 aut
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| 700 |
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|a Silva, A Fernando
|e verfasserin
|4 aut
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|a Quentel, François
|e verfasserin
|4 aut
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|a L'Her, Maurice
|e verfasserin
|4 aut
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|a Lovrić, Milivoj
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 22(2006), 7 vom: 28. März, Seite 3404-12
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
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|g volume:22
|g year:2006
|g number:7
|g day:28
|g month:03
|g pages:3404-12
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