Water-oxidizing complex in Photosystem II: Its structure and relation to manganese-oxide based catalysts

MM Najafpour, I Zaharieva, Z Zand, SM Hosseini… - Coordination Chemistry …, 2020 - Elsevier
Cyanobacteria, green algae, and higher plants provide the major part of molecular O 2 of
Earth atmosphere via water oxidation of oxygenic photosynthesis. The water-oxidizing …

Structural evidence for intermediates during O2 formation in photosystem II

A Bhowmick, R Hussein, I Bogacz, PS Simon… - Nature, 2023 - nature.com
In natural photosynthesis, the light-driven splitting of water into electrons, protons and
molecular oxygen forms the first step of the solar-to-chemical energy conversion process …

Nature of S-states in the oxygen-evolving complex resolved by high-energy resolution fluorescence detected X-ray absorption spectroscopy

M Chrysina, M Drosou, RG Castillo… - Journal of the …, 2023 - ACS Publications
Photosystem II, the water splitting enzyme of photosynthesis, utilizes the energy of sunlight
to drive the four-electron oxidation of water to dioxygen at the oxygen-evolving complex …

The S3 State of the Oxygen-Evolving Complex: Overview of Spectroscopy and XFEL Crystallography with a Critical Evaluation of Early-Onset Models for O–O Bond …

DA Pantazis - Inorganics, 2019 - mdpi.com
The catalytic cycle of the oxygen-evolving complex (OEC) of photosystem II (PSII) comprises
five intermediate states S i (i= 0–4), from the most reduced S0 state to the most oxidized S4 …

Atomically dispersed iridium on indium tin oxide efficiently catalyzes water oxidation

D Lebedev, R Ezhov, J Heras-Domingo… - ACS central …, 2020 - ACS Publications
Heterogeneous catalysts in the form of atomically dispersed metals on a support provide the
most efficient utilization of the active component, which is especially important for scarce and …

O–O bond formation and oxygen release in photosystem II are enhanced by spin-exchange and synergetic coordination interactions

X Song, B Wang - Journal of Chemical Theory and Computation, 2023 - ACS Publications
The photosystem II (PSII)-catalyzed water oxidation is crucial for maintaining life on earth.
Despite the extensive experimental and computational research that has been conducted …

Model of the oxygen evolving complex which is highly predisposed to O–O bond formation

Y Pushkar, KM Davis, MC Palenik - The Journal of Physical …, 2018 - ACS Publications
Light-driven water oxidation is a fundamental reaction in the biosphere. The Mn4Ca cluster
of photosystem II cycles through five redox states termed S0–S4, after which oxygen is …

A High‐Valent Manganese (IV)–Oxo–Cerium (IV) Complex and Its Enhanced Oxidizing Reactivity

DG Karmalkar, M Sankaralingam… - Angewandte Chemie …, 2019 - Wiley Online Library
A mononuclear nonheme manganese (IV)–oxo complex binding the Ce4+ ion,[(dpaq) MnIV
(O)]+–Ce4+ (1‐Ce4+), was synthesized by reacting [(dpaq) MnIII (OH)]+(2) with cerium …

Spin, Valence, and Structural Isomerism in the S3 State of the Oxygen-Evolving Complex of Photosystem II as a Manifestation of Multimetallic Cooperativity

H Isobe, M Shoji, T Suzuki, JR Shen… - Journal of chemical …, 2019 - ACS Publications
Photosynthetic water oxidation is catalyzed by a Mn4CaO5-cluster in photosystem II through
an S-state cycle. Understanding the roles of heterogeneity in each S-state, as identified …

How Nature Makes O2: an Electronic Level Mechanism for Water Oxidation in Photosynthesis

F Rummel, PJ O'Malley - The Journal of Physical Chemistry B, 2022 - ACS Publications
In this paper, we combine broken symmetry density functional calculations and electron
paramagnetic resonance analysis to obtain the electronic structure of the penultimate S3 …