Photosynthesis: from natural to artificial
This themed issue presents a collection of articles on natural and artificial photosynthesis.
Oxygen-evolving complex of photosystem II: correlating structure with spectroscopy
Hydrogen bonding is proposed to govern stabilization of the g = 2 or g = 4 form of the S2 state.
A unified model for surface electrocatalysis based on observations with enzymes
Many enzymes are superb, engineerable electrocatalysts: this timely Perspective describes a unifying model having wide relevance for understanding surface electrocatalysis.
Iron based photoanodes for solar fuel production
As with natural photosynthesis, artificial photosynthesis requires a water splitting-oxygen evolving system to supply high energy electrons to drive solar fuel production. Very attractive candidates are iron based semiconductors with appropriate band gaps and valence band energies.
Entropy and enthalpy contributions to the kinetics of proton coupled electron transfer to the Mn4O4(O2PPh2)6 cubane
The reaction of a manganese-oxo cubane with hydrogen atom donors effectively models water oxidation and charge transfer in natural photosynthesis.
Improving BiVO4 photoanodes for solar water splitting through surface passivation
A process is developed to selectively remove the NiOx species loaded onto the BiVO4 photoanodes, and the significantly increased photocurrents resulted from the process are attributed to the passivation of the recombination centers at the surface.
The first tyrosyl radical intermediate formed in the S2–S3 transition of photosystem II
The calcium ion structures the local environment and fine-tunes the properties of the redox-active tyrosyl radical in photosystem II.
Hydration of the oxygen-evolving complex of photosystem II probed in the dark-stable S1 state using proton NMR dispersion profiles
The hydration of the oxygen-evolving complex in photosystem II is analyzed by paramagnetic relaxation enhancement measurements of the bulk water.
Computational investigation of structural and electronic properties of aqueous interfaces of GaN, ZnO, and a GaN/ZnO alloy
Snapshots of equilibrated aqueous interfaces of GaN(100), ZnO(100), GaN/ZnO(100), and GaN/ZnO(110) surfaces from DFT/MD simulations.
Radical O–O coupling reaction in diferrate-mediated water oxidation studied using multireference wave function theory
Diferrate-mediated O–O bond formation was studied using ab initio density matrix renormalization group theory with large-size active space CAS(36e,32o) in conjunction with dynamic correlation correction.
A Co(II)–Ru(II) dyad relevant to light-driven water oxidation catalysis
The covalent anchoring of a Co(II) water oxidation catalyst to a Ru(II) photosensitizer with potential application in artificial photosynthesis.
Silicon based tandem cells: novel photocathodes for hydrogen production
Silicon based thin film tandem solar cells are used as photocathodes for hydrogen production by splitting water yielding 5% efficiency.
Redox hydrogels with adjusted redox potential for improved efficiency in Z-scheme inspired biophotovoltaic cells
Efficient Z-scheme inspired biophotovoltaics based on an anode with photosystem 2 integrated in a redox dye modified hydrogel in combination with a cathode with photosystem 1 integrated in an Os-complex modified hydrogel.
Collecting meaningful early-time kinetic data in homogeneous catalytic water oxidation with a sacrificial oxidant
A continuous flow reactor for simultaneous measurement of critical early-time concentrations of dioxygen and oxidant in catalytic water oxidation reactions.
Artificial photosynthesis – functional devices for light driven water splitting with photoactive anodes based on molecular catalysts
Photoactive anodes consisting of Ru(bpy)3 type photosensitizer 1 and molecular catalysts 2 and 3 on nanostructured TiO2 have been assembled in functional devices for successful light driven water splitting.
Water oxidation by manganese oxides formed from tetranuclear precursor complexes: the influence of phosphate on structure and activity
The effect of extensive phosphate ligation on the oxygen evolution activity is investigated in two structurally distinct manganese oxides.
Generalized approximate spin projection calculations of effective exchange integrals of the CaMn4O5 cluster in the S1 and S3 states of the oxygen evolving complex of photosystem II
Broken-symmetry UB3LYP calculations have elucidated structural symmetry-breaking in the S1 and S3 states of the oxygen evolution complex (OEC) of photosystem II (PSII), providing the right (RO)- and left (LO)-opened structures.
Water oxidation energy diagrams for photosystem II for different protonation states, and the effect of removing calcium
The main parts of the water oxidation mechanism in photosystem II have now been established both from theory and experiments.
Towards a structure-based exciton Hamiltonian for the CP29 antenna of photosystem II
A structure-based exciton Hamiltonian of plant light-harvesting complex CP29 is used to simulate optical spectra and to identify energy sinks.
Carbon dioxide reduction via light activation of a ruthenium–Ni(cyclam) complex
The RuII–NiII complex performs the reduction of CO2 into CO and H2 by activation with 450 nm visible light.
A water-soluble tin(IV) porphyrin as a bioinspired photosensitiser for light-driven proton-reduction
Water-soluble tin(IV) porphyrins could be used as “artificial chlorophylls” for light-driven proton reduction to generate H2 and the tin(IV) chlorin could be identified as a key reaction intermediate.
Structure, ligands and substrate coordination of the oxygen-evolving complex of photosystem II in the S2 state: a combined EPR and DFT study
Site perturbation of the oxygen-evolving complex provides a means to locate the first substrate water.
Efficient water oxidation with organometallic iridium complexes as precatalysts
Catalytic water oxidation has been investigated using Cp*Ir(6,6′-dihydroxy-2,2′-bipyridine)(OH2)2+ as a precatalyst and NaIO4 as an oxidant at various pH conditions.
Dinuclear manganese complexes for water oxidation: evaluation of electronic effects and catalytic activity
A library of dinuclear Mn-based water oxidation catalysts demonstrates that distal, non-innocent groups in the ligand framework enhance their catalytic efficiency.
Effects of hydrogen bonding interactions on the redox potential and molecular vibrations of plastoquinone as studied using density functional theory calculations
The redox potential of plastoquinone, an electron acceptor in photosystem II, is controlled by its H-bonding interactions, which can be monitored by detecting the CO stretching vibrations.
Introducing manganese complexes as redox mediators for dye-sensitized solar cells
As a step towards more environmentally benign DSCs, a manganese acetylacetonato one-electron redox couple has been applied in DSCs and efficiencies of 4.4% achieved.
Effect of post-treatments on the photocatalytic activity of Sm2Ti2S2O5 for the hydrogen evolution reaction
Post-treatments based on sulphur annealing and nitric acid etching allowed Sm2Ti2S2O5 to be used in Z-scheme water splitting.
About this collection
Physical Chemistry Chemical Physics is delighted to present a themed-collection highlighting research on 'Photosynthesis: From Natural to Artificial', Guest Edited by Johannes Messinger, Wolfgang Lubitz and Jian-Ren Shen.