Photoelectrochemistry of a pigment used in artificial photosynthesis: An anilinocarotenoid

F. Fungo, L. Otero, E. N. Durantini, J. J. Silber, L. Sereno, E. Mariño-Ochoa, Thomas A Moore, Ana L Moore, John Devens Gust

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

LB films of an amphiphatic carotenoid, 7′-apo-7′-(4-aminophenyl)-β-carotene (H2APC), deposited on semiconducting transparent ITO electrodes, when immersed in electrolyte-containing benzoquinone (Q) and illuminated, produced photocurrents that were measured over the spectral range of 350-700 nm. The generated photocurrent was investigated as a function of different variables: bias potential, number of LB layers, and concentration of Q in the surrounding electrolyte. Only cathodic photocurrents were observed with H2APC. The action spectrum shows that the absorption of light by the carotenoid pigment is responsible for the photocurrent effects. The photoresponse increases linearly with the number of LB layers deposited. The quantum yield of electron transfer is independent of the number of layers, indicating efficient charge and/or energy transfer between the layers. This result is unique to carotenoids films. Anodic photocurrents were not detected even in the presence of electron-donor couples. This behavior is in contrast to that observed with another amphipathic carotenoid, 7′-apo-7′(4-carboxyphenyl)-β-carotene (ACC), which generates photocurrents in either direction depending on the external couple.

Original languageEnglish
Pages (from-to)4783-4790
Number of pages8
JournalJournal of Physical Chemistry B
Volume105
Issue number21
DOIs
Publication statusPublished - May 31 2002

Fingerprint

photoelectrochemistry
photosynthesis
Photosynthesis
Carotenoids
pigments
Photocurrents
Pigments
photocurrents
carotenoids
carotene
Electrolytes
electrolytes
Electrons
Langmuir Blodgett films
quinones
Quantum yield
ITO (semiconductors)
Energy transfer
electron transfer
energy transfer

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Fungo, F., Otero, L., Durantini, E. N., Silber, J. J., Sereno, L., Mariño-Ochoa, E., ... Gust, J. D. (2002). Photoelectrochemistry of a pigment used in artificial photosynthesis: An anilinocarotenoid. Journal of Physical Chemistry B, 105(21), 4783-4790. https://doi.org/10.1021/jp001509j

Photoelectrochemistry of a pigment used in artificial photosynthesis : An anilinocarotenoid. / Fungo, F.; Otero, L.; Durantini, E. N.; Silber, J. J.; Sereno, L.; Mariño-Ochoa, E.; Moore, Thomas A; Moore, Ana L; Gust, John Devens.

In: Journal of Physical Chemistry B, Vol. 105, No. 21, 31.05.2002, p. 4783-4790.

Research output: Contribution to journalArticle

Fungo F, Otero L, Durantini EN, Silber JJ, Sereno L, Mariño-Ochoa E et al. Photoelectrochemistry of a pigment used in artificial photosynthesis: An anilinocarotenoid. Journal of Physical Chemistry B. 2002 May 31;105(21):4783-4790. https://doi.org/10.1021/jp001509j
Fungo, F. ; Otero, L. ; Durantini, E. N. ; Silber, J. J. ; Sereno, L. ; Mariño-Ochoa, E. ; Moore, Thomas A ; Moore, Ana L ; Gust, John Devens. / Photoelectrochemistry of a pigment used in artificial photosynthesis : An anilinocarotenoid. In: Journal of Physical Chemistry B. 2002 ; Vol. 105, No. 21. pp. 4783-4790.
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