Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature

  title={Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature},
  author={Elisabetta Collini and Cathy Y. Wong and Krystyna E. Wilk and Paul M. G. Curmi and Paul Brumer and Gregory D. Scholes},
Photosynthesis makes use of sunlight to convert carbon dioxide into useful biomass and is vital for life on Earth. Crucial components for the photosynthetic process are antenna proteins, which absorb light and transmit the resultant excitation energy between molecules to a reaction centre. The efficiency of these electronic energy transfers has inspired much work on antenna proteins isolated from photosynthetic organisms to uncover the basic mechanisms at play. Intriguingly, recent work has… 

Solar light harvesting by energy transfer: from ecology to coherence

Two-dimensional electronic spectroscopy experiments reveal the existence of coherence among vibronic levels in the initial response of light-harvesting proteins to femtosecond optical excitation and discuss what implications quantum transport processes might have for light harvesting.

Direct evidence of quantum transport in photosynthetic light-harvesting complexes

Experimental evidence is provided that interaction between the bacteriochlorophyll chromophores and the protein environment surrounding them not only prolongs quantum coherence, but also spawns reversible, oscillatory energy transfer among excited states.

Quantum Coherent Energy Transfer over Varying Pathways in Single Light-Harvesting Complexes

It is found that quantum coherences between electronically coupled energy eigenstates persist at least 400 femtoseconds and that distinct energy-transfer pathways that change with time can be identified in each complex.

Marine cyanobacteria tune energy transfer efficiency in their light‐harvesting antennae by modifying pigment coupling

It is suggested that coupling control can be a major factor in photosynthetic antenna acclimation to different light conditions and two physical models according to which the enhanced coupling strength results from additional coupled pathways formed by rearranging rod packing or from the coupling becoming non‐classical are suggested.

Structure and Efficiency in Bacterial Photosynthetic Light-Harvesting.

This model describes the experimentally observed high efficiency of light harvesting, despite the absence of long-range quantum coherence, and helps explain the high transport efficiency in organisms with widely differing antenna structures, and suggests new design criteria for artificial light-harvesting devices.

Structural Tuning of Quantum Decoherence and Coherent Energy Transfer in Photosynthetic Light Harvesting.

It is demonstrated that coherent energy transfer to the lowest-energy excitons is principally controlled in a light-harvesting protein by the temporal persistence of quantum coherence rather than by the strength of vibronic coupling.

Photosynthetic reaction center as a quantum heat engine

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Light Absorption and Energy Transfer in the Antenna Complexes of Photosynthetic Organisms.

The description of energy transfer, in particular multichromophoric antenna structures, is shown to vary depending on the spatial and energetic landscape, which dictates the relative coupling strength between constituent pigment molecules.

Quantum coherence explored at the level of individual light-harvesting complexes

Quantum mechanical effects in biological processes, such as natural photosynthesis, are intriguing and lively debated issues. The initial steps of photosynthesis comprise the absorption of sunlight



Evidence for wavelike energy transfer through quantum coherence in photosynthetic systems

Previous two-dimensional electronic spectroscopy investigations of the FMO bacteriochlorophyll complex are extended, and direct evidence is obtained for remarkably long-lived electronic quantum coherence playing an important part in energy transfer processes within this system is obtained.

Dynamics of light harvesting in photosynthesis.

This review emphasizes recent experimental observations of long-lasting quantum coherence in photosynthetic systems and the implications of quantumCoherence in natural photosynthesis.

Ultrafast light harvesting dynamics in the cryptophyte phycocyanin 645.

  • T. MirkovicA. Doust G. Scholes
  • Physics, Chemistry
    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2007
It is suggested that the final resonance energy transfer step occurs between the PCB 82 bilins on a timescale estimated to be approximately 15 ps, which cannot be rationalized by calculations that combine experimental parameters and quantum chemical calculations, which predict the energy transfer time to be 40 ps.

Light-Harvesting Antennas in Photosynthesis

This paper presents a meta-analyses of light-Harvesting systems in Cyanophyta and Rhodophyta using a modified version of the Higgs boson method, which combines a high-resolution 3D image and a low-resolution 2D model, both of which are capable of discriminating between green and purple photosynthetic Membranes.

Energy transfer in photosynthesis: experimental insights and quantitative models.

We overview experimental and theoretical studies of energy transfer in the photosynthetic light-harvesting complexes LH1, LH2, and LHCII performed during the past decade since the discovery of

Phycocyanin sensitizes both photosystem I and photosystem II in cryptophyte Chroomonas CCMP270 cells.

This article presents an investigation of the energy migration dynamics in intact cells of the unicellular photosynthetic cryptophyte Chroomonas CCMP270 by steady-state and time-resolved fluorescence measurements and suggests a similar membrane organization for the cryptophytes with the phycobiliproteins tightly packed in the thylakoid lumen around the periphery of the photosystems.

Beyond Förster resonance energy transfer in biological and nanoscale systems.

Various ways that electronic energy transfer is promoted by mechanisms beyond those explicitly considered in Forster RET theory are considered.

Evolution of a light-harvesting protein by addition of new subunits and rearrangement of conserved elements: crystal structure of a cryptophyte phycoerythrin at 1.63-A resolution.

  • K. E. WilkS. Harrop P. Curmi
  • Biology, Chemistry
    Proceedings of the National Academy of Sciences of the United States of America
  • 1999
The architecture of the heterodimer suggests that PE 545 may dock to an acceptor protein via a deep cleft and that energy may be transferred via this intermediary protein to the reaction center.

Excitons in nanoscale systems

A cross-disciplinary review of the essential characteristics of excitons in nanoscience is presented, highlighting the importance of quantum dots, conjugated polymers, carbon nanotubes and photosynthetic light-harvesting antenna complexes.