Self-regulation of photoinduced electron transfer by a molecular nonlinear transducer

Stephen D. Straight, Gerdenis Kodis, Yuichi Terazono, Michael Hambourger, Thomas A Moore, Ana L Moore, John Devens Gust

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Organisms must adapt to survive, necessitating regulation of molecular and subcellular processes. Green plant photosynthesis responds to potentially damaging light levels by downregulating the fraction of excitation energy that drives electron transfer. Achieving adaptive, self-regulating behaviour in synthetic molecules is a critical challenge that must be met if the promises of nanotechnology are to be realized. Here we report a molecular pentad consisting of two light-gathering antennas, a porphyrin electron donor, a fullerene electron acceptor and a photochromic control moiety. At low white-light levels, the molecule undergoes photoinduced electron transfer with a quantum yield of 82%. As the light intensity increases, photoisomerization of the photochrome leads to quenching of the porphyrin excited state, reducing the quantum yield to as low as 27%. This self-regulating molecule modifies its function according to the level of environmental light, mimicking the non-photochemical quenching mechanism for photoprotection found in plants.

Original languageEnglish
Pages (from-to)280-283
Number of pages4
JournalNature Nanotechnology
Volume3
Issue number5
DOIs
Publication statusPublished - May 2008

Fingerprint

Transducers
electron transfer
transducers
automatic control
Electrons
porphyrins
Porphyrins
Quantum yield
quenching
Molecules
Quenching
molecules
photosynthesis
Fullerenes
Photoisomerization
nanotechnology
organisms
Photosynthesis
Excitation energy
luminous intensity

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Self-regulation of photoinduced electron transfer by a molecular nonlinear transducer. / Straight, Stephen D.; Kodis, Gerdenis; Terazono, Yuichi; Hambourger, Michael; Moore, Thomas A; Moore, Ana L; Gust, John Devens.

In: Nature Nanotechnology, Vol. 3, No. 5, 05.2008, p. 280-283.

Research output: Contribution to journalArticle

Straight, Stephen D. ; Kodis, Gerdenis ; Terazono, Yuichi ; Hambourger, Michael ; Moore, Thomas A ; Moore, Ana L ; Gust, John Devens. / Self-regulation of photoinduced electron transfer by a molecular nonlinear transducer. In: Nature Nanotechnology. 2008 ; Vol. 3, No. 5. pp. 280-283.
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