Conversion of light energy to proton potential in liposomes by artificial photosynthetic reaction centres

Steinberg-Yfrach, Gali; Liddell, Paul A.; Hung, Su Chun; Moore, Ana L.; Gust, Devens; Moore, Thomas A.

doi:10.1038/385239a0

Cited by 412 publications

(302 citation statements)

References 16 publications

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“…The top figure presents the triad (donor "D", photo-sensitive part "B,C", and acceptor "A") and the shuttle "S" [9,10]. These are enclosed by color circles, which are schematically shown in the bottom figure.…”

Section: Fig 1: (Color Online)mentioning

confidence: 99%

“…The study of natural photosynthesis has inspired researchers to perform the photo-induced energy transduction processes in the laboratory [1,2,3,4,5,6,7,9,10,11,12]. A convenient approach to photosynthesis in artificial reaction centers is to use synthetic pigments, electron acceptors and electron donors that are very similar in molecular structure to natural pigments (e.g., chlorophylls, carotenoids and quinones).…”

Section: Introductionmentioning

confidence: 99%

“…In this direction, the experimental model proposed in Refs. [9,10] provides a paradigm for the conversion of light energy to a proton potential gradient. These seminal works [9,10] have motivated research in the design and synthesis of new artificial photosynthetic systems [13,14,15] (i.e., lightharvesting antennas and reaction centers) and triggered considerable experimental [16,17,18,19,20] and theoretical [21,22,23,24] activities to investigate more sophisticated and more efficient mechanisms for the conversion …”

Section: Introductionmentioning

confidence: 99%

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Modeling light-driven proton pumps in artificial photosynthetic reaction centers

Ghosh

Smirnov

Nori

2009

The Journal of Chemical Physics

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We study a model of a light-induced proton pump in artificial reaction centers. The model contains a molecular triad with four electron states (i.e., one donor state, two photosensitive group states, and one acceptor state) as well as a molecular shuttle having one electron and one proton-binding sites. The shuttle diffuses between the sides of the membrane and translocates protons energetically uphill: from the negative side to the positive side of the membrane, harnessing for this purpose the energy of the electron-charge-separation produced by light. Using methods of quantum transport theory we calculate the range of light intensity and transmembrane potentials that maximize both the light-induced proton current and the energy transduction efficiency. We also study the effect of temperature on proton pumping. The light-induced proton pump in our model gives a quantum yield of proton translocation of about 55%. Thus, our results explain previous experiments on these artificial photosynthetic reaction centers.

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Section: Fig 1: (Color Online)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling light-driven proton pumps in artificial photosynthetic reaction centers

Ghosh

Smirnov

Nori

2009

The Journal of Chemical Physics

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“…Efforts to mimic natural photosynthetic processes have been under way since 1912, when Giacomo Ciamician (37) envisioned artificial photosynthesis to be ''the photochemistry of the future.'' Considerable progress has been made both to understand the molecular mechanisms of photosynthesis and to develop synthetic and engineering methods to extend the biological processes to synthetic systems (38)(39)(40). In the last 20 years, there have been significant efforts to synthesize and engineer artificial light-harvesting antennae and reaction centers, and a wide variety of donor and acceptor molecules and macromolecular architectures have been produced and characterized (41,42).…”

Section: Opportunities For Nanotechnology: Synthetic and Biomimetic Amentioning

confidence: 99%

“…Although it is very difficult to reproduce the dynamic physics of biological self-assembly outside of living systems, applying similar noncovalent chemistries and using traditional engineering methods to produce well ordered systems have been shown to be plausible methods for producing artificial photosynthesis (40,(48)(49)(50).…”

Section: Opportunities For Nanotechnology: Synthetic and Biomimetic Amentioning

confidence: 99%

Approaches for biological and biomimetic energy conversion

LaVan

Jennifer²

2006

Proc. Natl. Acad. Sci. U.S.A.

116

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This article highlights areas of research at the interface of nanotechnology, the physical sciences, and biology that are related to energy conversion: specifically, those related to photovoltaic applications. Although much ongoing work is seeking to understand basic processes of photosynthesis and chemical conversion, such as light harvesting, electron transfer, and ion transport, application of this knowledge to the development of fully synthetic and͞or hybrid devices is still in its infancy. To develop systems that produce energy in an efficient manner, it is important both to understand the biological mechanisms of energy flow for optimization of primary structure and to appreciate the roles of architecture and assembly. Whether devices are completely synthetic and mimic biological processes or devices use natural biomolecules, much of the research for future power systems will happen at the intersection of disciplines.biotechnology ͉ nanotechnology ͉ photosynthesis ͉ photovoltaic R ecently, the National Academies and the Keck Foundation held a meeting to discuss the development of new applications for nanotechnology ¶ with the goal of identifying challenges where the convergence of nanoscience and physical and biosciences could provide a revolutionary outcome. One area clearly in need of new technologies is biological and biomimetic methods of energy conversion. Within this broad area, focus was given to two specific applications: the conversion of solar energy into useful electrical or chemical energy and the production of power for in vivo medical devices. The following sections will provide both an economic perspective on current photovoltaic (PV) technology and an overview of the various research efforts toward using or mimicking biological systems to improve current and future energy-conversion systems.

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