A new energy transfer channel from carotenoids to chlorophylls in purple bacteria

Feng, Jinkui; Tseng, Chi-Wei; Chen, Ting-Wei; Leng, Xigang; Yin, Huabing; Cheng, Yuan‐Chung; Rohlfing, Michael; Ma, Yuchen

doi:10.1038/s41467-017-00120-7

Cited by 34 publications

(30 citation statements)

References 65 publications

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“…LH pigment -protein complexes from purple photosynthetic bacteria can bind many different carotenoids, with significant variations observed not only between bacterial species but also for the same species in different habitats [90]. These carotenoids can have different functions depending on their configuration and environment, either as auxiliary LH molecules [100,101] or as photoprotective species quenching Chl exited states [33,90,91]. In native LH pigment -protein complexes, spheroidene and neurosporene bind to LH2 from Rhodobacter sphaeroides, strains 2.4.1 (grown anaerobically) and G1C, respectively, whereas spirilloxanthin is present in LH1 from Rhodospirillum rubrum strain S1 [90,91,102].…”

Section: Linear Carotenoids In Purple Bacteriamentioning

confidence: 99%

“…These carotenoids can have different functions depending on their configuration and environment, either as auxiliary LH molecules [100,101] or as photoprotective species quenching Chl exited states [33,90,91]. In native LH pigment -protein complexes, spheroidene and neurosporene bind to LH2 from Rhodobacter sphaeroides, strains 2.4.1 (grown anaerobically) and G1C, respectively, whereas spirilloxanthin is present in LH1 from Rhodospirillum rubrum strain S1 [90,91,102].…”

Section: Linear Carotenoids In Purple Bacteriamentioning

confidence: 99%

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Electronic and vibrational properties of carotenoids: from in vitro to in vivo

Llansola-Portolés¹,

Pascal²,

Robert³

2017

J. R. Soc. Interface.

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Carotenoids are among the most important organic compounds present in Nature and play several essential roles in biology. Their configuration is responsible for their specific photophysical properties, which can be tailored by changes in their molecular structure and in the surrounding environment. In this review, we give a general description of the main electronic and vibrational properties of carotenoids. In the first part, we describe how the electronic and vibrational properties are related to the molecular configuration of carotenoids. We show how modifications to their configuration, as well as the addition of functional groups, can affect the length of the conjugated chain. We describe the concept of effective conjugation length, and its relationship to the S 0 ! S 2 electronic transition, the decay rate of the S 1 energetic level and the frequency of the n 1 Raman band. We then consider the dependence of these properties on extrinsic parameters such as the polarizability of their environment, and how this information (S 0 ! S 2 electronic transition, n 1 band position, effective conjugation length and polarizability of the environment) can be represented on a single graph. In the second part of the review, we use a number of specific examples to show that the relationships can be used to disentangle the different mechanisms tuning the functional properties of protein-bound carotenoids.

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Section: Linear Carotenoids In Purple Bacteriamentioning

confidence: 99%

Section: Linear Carotenoids In Purple Bacteriamentioning

confidence: 99%

Electronic and vibrational properties of carotenoids: from in vitro to in vivo

Llansola-Portolés¹,

Pascal²,

Robert³

2017

J. R. Soc. Interface.

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“…Our GW, BSE, and electronic coupling calculations are done by means of a Gaussian orbital based code ,, which has been applied in electronic excitations of many organic systems and carbon nanotubes. − Single-particle orbital information obtained from DFT under the Perdew–Burke–Ernzerhof (PBE) generalized gradient approximation to the exchange-correlation functional is employed to build Green’s function G , the polarizability which is required to compute W and the excitonic wave functions. Geometries of the molecules and SWNTs are optimized by DFT with the PBE functional using the plane-wave-based Vienna ab initio simulation package (VASP). , …”

Section: Methodsmentioning

confidence: 99%

Role of Dark Excitons in the Excitation Energy Transfer of Carbon Nanotubes

et al. 2021

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Excitation energy transfer (EET) between single-walled carbon nanotubes (SWNTs) and organic molecules and that between SWNTs have been extensively studied in experiments. Our first-principles calculations based on many-body Green’s function theory show that the Förster’s dipole–dipole coupling approximation fails for the EET of SWNTs, while higher multipole interactions play a major role. This means that donor–acceptor electronic coupling related to the dark excitons of SWNTs may sometimes become several orders of magnitude stronger than that related to the bright ones; therefore, dark excitons might govern the EET of SWNTs. This is in contrast to the general viewpoint that EET is realized through the coupling between bright excitons. Dexter exchange interactions contribute little to the EET of SWNTs even when the donor and acceptor are in close proximity to each other.

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“…More recently, all-atomistic modeling has offered detailed information on physical implications of 2DES signals (Segatta et al, 2017;van der Vegte et al, 2015). The dark states of carotenoids of LH2, which had long been speculated to be present, was investigated recently based on quantum chemical calculations and simulation of 2DES spectroscopic data (Feng et al, 2017;Segatta et al, 2017). However, the results obtained so far are not yet sufficient to lead to a general consensus.…”

Section: Lh2 Complexmentioning

confidence: 99%

Delocalized excitons in natural light-harvesting complexes

2018

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Natural organisms such as photosynthetic bacteria, algae, and plants employ complex molecular machinery to convert solar energy into biochemical fuel. An important common feature shared by most of these photosynthetic organisms is that they capture photons in the form of excitons typically delocalized over a few to tens of pigment molecules embedded in protein environments of light harvesting complexes (LHCs). Delocalized excitons created in such LHCs remain well protected despite being swayed by environmental fluctuations, and are delivered successfully to their destinations over hundred nanometer length scale distances in about hundred picosecond time scales. Decades of experimental and theoretical investigation have produced a large body of information offering insights into major structural, energetic, and dynamical features contributing to LHCs' extraordinary capability to harness photons using delocalized excitons. The objective of this review is (i) to provide a comprehensive account of major theoretical, computational, and spectroscopic advances that have contributed to this body of knowledge, and (ii) to clarify the issues concerning the role of delocalized excitons in achieving efficient energy transport mechanisms. The focus of this review is on three representative systems, Fenna-Matthews-Olson complex of green sulfur bacteria, light harvesting 2 complex of purple bacteria, and phycobiliproteins of cryptophyte algae. Although we offer more in-depth and detailed description of theoretical and computational aspects, major experimental results and their implications are also assessed in the context of achieving excellent light harvesting functionality. Future theoretical and experimental challenges to be addressed in gaining better understanding and utilization of delocalized excitons are also discussed.

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A new energy transfer channel from carotenoids to chlorophylls in purple bacteria

Cited by 34 publications

References 65 publications

Electronic and vibrational properties of carotenoids: from in vitro to in vivo

Electronic and vibrational properties of carotenoids: from in vitro to in vivo

Role of Dark Excitons in the Excitation Energy Transfer of Carbon Nanotubes

Delocalized excitons in natural light-harvesting complexes

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