Reversible photoinduced electron transfer in a ruthenium poly(2-methoxyaniline-5-sulfonic acid) composite film

Lynn Dennany, Peter C. Innis, Gordon G. Wallace, Robert J. Forster

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In situ electron spin resonance (ESR) studies have been performed on composite films consisting of a ruthenium tris(bipyridyl) complex and an inherently conducting polymer, poly(2-methoxyaniline-5-sulfonic acid) (PMAS). The composites were investigated under white light irradiation and potential control conditions to probe photoinduced electron transfer between the ruthenium metal center and the conducting polymer. PMAS exhibited a clear ESR signal, characteristic of the presence of mobile single spin polarons within the polymer structure. Irradiation of the PMAS in the presence of the ruthenium metal center resulted in the photo-oxidation of the Ru2+ to the Ru3+ state, as a result of which the PMAS ESR signal was replaced by a response typical of the Ru3+ salt. Upon removal of the illumination, reversible photo switching occurred. This reversibility makes these novel composites promising for applications in areas such as chemical sensors, light switching, and light harvesting devices.

LanguageEnglish
Pages12907-12912
Number of pages6
JournalJournal of Physical Chemistry B
Volume112
Issue number41
DOIs
Publication statusPublished - 16 Oct 2008

Fingerprint

Ruthenium
sulfonic acid
Composite films
ruthenium
Paramagnetic resonance
electron paramagnetic resonance
electron transfer
Conducting polymers
conducting polymers
composite materials
Acids
Electrons
Metals
Irradiation
Polarons
2,2'-Dipyridyl
irradiation
Photooxidation
photooxidation
Composite materials

Keywords

  • sulfonated polyaniline
  • rigid-rod
  • molecular composites
  • polymers
  • electrochemistry
  • metallopolymers
  • polarons

Cite this

Dennany, Lynn ; Innis, Peter C. ; Wallace, Gordon G. ; Forster, Robert J. / Reversible photoinduced electron transfer in a ruthenium poly(2-methoxyaniline-5-sulfonic acid) composite film. In: Journal of Physical Chemistry B. 2008 ; Vol. 112, No. 41. pp. 12907-12912.
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Reversible photoinduced electron transfer in a ruthenium poly(2-methoxyaniline-5-sulfonic acid) composite film. / Dennany, Lynn; Innis, Peter C.; Wallace, Gordon G.; Forster, Robert J.

In: Journal of Physical Chemistry B, Vol. 112, No. 41, 16.10.2008, p. 12907-12912.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reversible photoinduced electron transfer in a ruthenium poly(2-methoxyaniline-5-sulfonic acid) composite film

AU - Dennany, Lynn

AU - Innis, Peter C.

AU - Wallace, Gordon G.

AU - Forster, Robert J.

PY - 2008/10/16

Y1 - 2008/10/16

N2 - In situ electron spin resonance (ESR) studies have been performed on composite films consisting of a ruthenium tris(bipyridyl) complex and an inherently conducting polymer, poly(2-methoxyaniline-5-sulfonic acid) (PMAS). The composites were investigated under white light irradiation and potential control conditions to probe photoinduced electron transfer between the ruthenium metal center and the conducting polymer. PMAS exhibited a clear ESR signal, characteristic of the presence of mobile single spin polarons within the polymer structure. Irradiation of the PMAS in the presence of the ruthenium metal center resulted in the photo-oxidation of the Ru2+ to the Ru3+ state, as a result of which the PMAS ESR signal was replaced by a response typical of the Ru3+ salt. Upon removal of the illumination, reversible photo switching occurred. This reversibility makes these novel composites promising for applications in areas such as chemical sensors, light switching, and light harvesting devices.

AB - In situ electron spin resonance (ESR) studies have been performed on composite films consisting of a ruthenium tris(bipyridyl) complex and an inherently conducting polymer, poly(2-methoxyaniline-5-sulfonic acid) (PMAS). The composites were investigated under white light irradiation and potential control conditions to probe photoinduced electron transfer between the ruthenium metal center and the conducting polymer. PMAS exhibited a clear ESR signal, characteristic of the presence of mobile single spin polarons within the polymer structure. Irradiation of the PMAS in the presence of the ruthenium metal center resulted in the photo-oxidation of the Ru2+ to the Ru3+ state, as a result of which the PMAS ESR signal was replaced by a response typical of the Ru3+ salt. Upon removal of the illumination, reversible photo switching occurred. This reversibility makes these novel composites promising for applications in areas such as chemical sensors, light switching, and light harvesting devices.

KW - sulfonated polyaniline

KW - rigid-rod

KW - molecular composites

KW - polymers

KW - electrochemistry

KW - metallopolymers

KW - polarons

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