Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates

Susan J. Stott; Katy J. McKenzie; Roger J. Mortimer; Colin M. Hayman; Benjamin R. Buckley; Philip C. Bulman Page; Frank Marken; Galyna Shul; Marcin Opallo

doi:10.1021/ac049317y

Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates

Susan J. Stott, Katy J. McKenzie, Roger J. Mortimer, Colin M. Hayman, Benjamin R. Buckley, Philip C. Bulman Page, Frank Marken, Galyna Shul, Marcin Opallo

Chemistry of Materials and Catalysis

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N',-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. Ibis electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.

Original language	English
Pages (from-to)	5364-5369
Number of pages	6
Journal	Analytical Chemistry
Volume	76
Issue number	18
DOIs	https://doi.org/10.1021/ac049317y
Publication status	Published - 2004

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10.1021/ac049317y

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Stott, S. J., McKenzie, K. J., Mortimer, R. J., Hayman, C. M., Buckley, B. R., Bulman Page, P. C., Marken, F., Shul, G., & Opallo, M. (2004). Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates. Analytical Chemistry, 76(18), 5364-5369. https://doi.org/10.1021/ac049317y

@article{369270dc8b0742ecad13a2a0b58990e6,

title = "Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates",

abstract = "Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N',-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. Ibis electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.",

author = "Stott, {Susan J.} and McKenzie, {Katy J.} and Mortimer, {Roger J.} and Hayman, {Colin M.} and Buckley, {Benjamin R.} and {Bulman Page}, {Philip C.} and Frank Marken and Galyna Shul and Marcin Opallo",

year = "2004",

doi = "10.1021/ac049317y",

language = "English",

volume = "76",

pages = "5364--5369",

journal = "Analytical Chemistry",

issn = "0003-2700",

publisher = "American Chemical Society",

number = "18",

}

Stott, SJ, McKenzie, KJ, Mortimer, RJ, Hayman, CM, Buckley, BR, Bulman Page, PC, Marken, F, Shul, G & Opallo, M 2004, 'Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates', Analytical Chemistry, vol. 76, no. 18, pp. 5364-5369. https://doi.org/10.1021/ac049317y

Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates. / Stott, Susan J.; McKenzie, Katy J.; Mortimer, Roger J. et al.

In: Analytical Chemistry, Vol. 76, No. 18, 2004, p. 5364-5369.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Liquid vertical bar liquid ion-transfer processes at the dioctylphosphoric acid (N,N-didodecyl-N ',N '-diethylphenylenediamine)vertical bar water (electrolyte) interface at graphite and mesoporous TiO2 substrates

AU - Stott, Susan J.

AU - McKenzie, Katy J.

AU - Mortimer, Roger J.

AU - Hayman, Colin M.

AU - Buckley, Benjamin R.

AU - Bulman Page, Philip C.

AU - Marken, Frank

AU - Shul, Galyna

AU - Opallo, Marcin

PY - 2004

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N2 - Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N',-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. Ibis electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.

AB - Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N',-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. Ibis electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.

U2 - 10.1021/ac049317y

DO - 10.1021/ac049317y

M3 - Article

VL - 76

SP - 5364

EP - 5369

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 18

ER -