A force awakens: exploiting solar energy beyond photosynthesis

Russo, David A.; Zedler, Julie A Z; Jensen, Poul Erik

doi:10.1093/jxb/erz054

Cited by 15 publications

(17 citation statements)

References 67 publications

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“…PSCs exhibit major application potential due to their greatly increased efficiencies in recent years . A new type of BSCs, as an upcoming technology, also show charming development momentum very recently due to their abundant raw materials, lower‐cost, and biodegradable properties …”

Section: Introductionmentioning

confidence: 99%

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Duan

Zhou

et al. 2020

Solar RRL

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Plenty of thin‐film solar cell technologies using organic materials have been developed to alleviate energy shortages. As developing devices for solar energy applications, artificial photosynthesis is a trend inspired from natural photosynthesis. Although the sophisticated system that exists in nature is fascinating, the development of photovoltaic devices focusing on the usage of natural chlorophylls has been quite limited, compared with the application of other counterparts such as artificial porphyrins or phthalocyanines. Herein, the development of semisynthetic chlorophyll derivatives as functional materials for solar cells are focused on. (Bacterio)chlorins possessing a carboxylic acid moiety as a binding site to semiconductors are synthesized to improve the efficiencies of dye‐sensitized solar cells, which are now leading to another application: photocatalysts for hydrogen evolution. In contrast, derivatives without a carboxy group can be applied to organic solar cells. As for the application for perovskite solar cells, self‐assembling aggregates of a kind of derivatives are proven to be suitable as hole‐transporting materials. In addition, a new type of solid‐state biosolar cells is proposed, in which chlorophyll derivatives act solely as the photoactive materials. This Report can enlarge the scope of advanced functional materials in the field of solar energy applications.

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Section: Introductionmentioning

confidence: 99%

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Duan

Zhou

et al. 2020

Solar RRL

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“…Cyanobacteria are of interest not only from a fundamental point of view given their immense ecological importance but also for applications as they are considered promising chassis to establish sustainable, light-driven biotechnological processes for a plethora of products from commodities to high-value compounds [ 103 , 104 , 105 , 106 ]. An important prerequisite for developing a target strain is the availability of reliable genetic manipulation tools and efficient transformation methods.…”

Section: Targeted Manipulation Of Natural Competencementioning

confidence: 99%

Function and Benefits of Natural Competence in Cyanobacteria: From Ecology to Targeted Manipulation

Schirmacher

Hanamghar

Zedler

2020

Life

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Natural competence is the ability of a cell to actively take up and incorporate foreign DNA in its own genome. This trait is widespread and ecologically significant within the prokaryotic kingdom. Here we look at natural competence in cyanobacteria, a group of globally distributed oxygenic photosynthetic bacteria. Many cyanobacterial species appear to have the genetic potential to be naturally competent, however, this ability has only been demonstrated in a few species. Reasons for this might be due to a high variety of largely uncharacterised competence inducers and a lack of understanding the ecological context of natural competence in cyanobacteria. To shed light on these questions, we describe what is known about the molecular mechanisms of natural competence in cyanobacteria and analyse how widespread this trait might be based on available genomic datasets. Potential regulators of natural competence and what benefits or drawbacks may derive from taking up foreign DNA are discussed. Overall, many unknowns about natural competence in cyanobacteria remain to be unravelled. A better understanding of underlying mechanisms and how to manipulate these, can aid the implementation of cyanobacteria as sustainable production chassis.

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“…Assay mix included TtAA9 (0.035 mg mL -1 ), ascorbic acid (1 mM) and Chl α or WSCP-Chl α (2.6 µM) (OD = 0.2, ε molar of 74,400 cm -1 M -1 ) calculated according to Palm et al 26 and 50 mM sodium phosphate buffer (pH 6.3). Varying conditions included light intensity (50, 200, 500 µmol m -2 s -1 ), temperature (25 and 50 °C) and pH (50 mM potassium phosphate buffer pH 5,6,7,8). Illumination was with cool white LEDs (4000 K spectrum) in a customized light rig and powered by Velleman™ DC Lab Switching Mode Power Supply.…”

Section: Assay For Determination Of Photostabilitymentioning

confidence: 99%

“…Plant and algal biomass are renewable and can provide sustainable fuel alternatives including bioethanol, biodiesel and biogas 2 . Besides providing biomass, photosynthetic organisms have also inspired the development of photobiocatalysis, a biomimicry tool, designed to speed up enzymatic reactions using light [3][4][5] . Photobiocatalysis has been shown to increase the activity of cytochrome P450s 6 , methane monooxygenases (pMMO) 7 and fungal lytic polysaccharide monooxygenases (LPMOs) [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Water-soluble chlorophyll-binding proteins from Brassica oleracea allow for stable photobiocatalytic oxidation of cellulose by a lytic polysaccharide monooxygenase.

Dodge

Russo

Blossom

et al. 2020

Preprint

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Background: Lytic polysaccharide monooxygenases (LPMOs) are indispensable redox enzymes used in industry for the saccharification of plant biomass. LPMO-driven cellulose oxidation can be enhanced considerably through photobiocatalysis using chlorophyll derivatives and light. Water soluble chlorophyll binding proteins (WSCPs) make it is possible to stabilize and solubilize chlorophyll in aqueous solution, allowing for in vitro studies on photostability and ROS production. Here we aim apply a WSCP-Chl α as a photosensitizing complex for photobiocatalysis with the LPMO, TtAA9. Results: We have in this study demonstrated how WSCP reconstituted with chlorophyll a (WSCP-Chl α) can create a stable photosensitizing complex which produces controlled amounts of H2O2 in the presence of ascorbic acid and light. WSCP-Chl α is highly reactive and allows for tightly controlled formation of H2O2 by regulating light intensity. TtAA9 together with WSCP-Chl α shows increased cellulose oxidation under low light conditions, and the WSCP-Chl α complex remains stable after 24 hours of light exposure. Additionally, the WSCP-Chl α complex demonstrates stability over a range of temperatures and pH conditions relevant for enzyme activity in industrial settings.Conclusion: With WSCP-Chl α as the photosensitizer, the need to replenish Chl is greatly reduced, enhancing the catalytic lifetime of light-driven LPMOs and increasing the efficiency of cellulose depolymerization. WSCP-Chl α allows for stable photobiocatalysis providing a sustainable solution for biomass processing.

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A force awakens: exploiting solar energy beyond photosynthesis

Cited by 15 publications

References 67 publications

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Function and Benefits of Natural Competence in Cyanobacteria: From Ecology to Targeted Manipulation

Water-soluble chlorophyll-binding proteins from Brassica oleracea allow for stable photobiocatalytic oxidation of cellulose by a lytic polysaccharide monooxygenase.

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