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Articles by Matthew Longhurst
A Low-Oxidation-State Mechanism for O─O Bond Formation in Photosystem II via Oxo–Hydroxyl Radical Coupling
1 Introduction Photosynthetic oxygen evolution in plants and cyanobacteria occurs through water oxidation at the Mn4CaO5/6 cluster in the oxygen-evolving complex (OEC) of Photosystem II (PSII) [1-9]. This process follows the Kok cycle (Figure 1) [10], where the cluster progresses stepwise through five oxidation states, S0 to S4. The S0 to S3 states are relatively stable, whereas the S4 state is short-lived and is the stage where O─O bond formation occurs, leading to O2 release.
A Bioinspired Water Oxidation Catalyst that is ~1/10th as Active as the Photosystem II Oxygen Evolving Center at pH 7: A Study of Activity and Stability Factors
A Bioinspired Water Oxidation Catalyst that is ~1/10th as Active as the Photosystem II Oxygen Evolving Center at pH 7: A Study of Activity and Stability Factors The activity and stability of a heterogeneous water oxidation catalyst inspired by the Photosystem II – Oxygen Evolving Center (PSII-OEC) is reported.
Mechanistic elucidation of O2 production from tBuOOH in water using [Mn2(mcbpen)2(H2O)2]2+ (Mn(II)) as the catalyst: a DFT study
Mechanistic elucidation of O2 production from tBuOOH in water using [Mn2(mcbpen)2(H2O)2]2+ (Mn(II)) as the catalyst: a DFT study This study employs density functional theory at the SMD/B3LYP-D3/6-311+G(2d,p),def2-TZVPP//SMD/B3LYP-D3/6-31G(d),SDD level of theory to explore the mechanistic details of O2 generation from tBuOOH, using H218O as the solvent, in the presence of the catalyst [Mn2(mcbpen)2(H2O)2]2+ (Mn(II)).
Mechanisms of Mn(V)‐Oxo to Mn(IV)‐Oxyl Conversion: From Closed‐Cubane Photosystem II to Mn(V) Catalysts and the Role of the Entering Ligands
Introduction Plants, algae, and cyanobacteria produce life-sustaining oxygen (O2) through the process of photosynthetic water splitting. This vital reaction is catalyzed by the Mn4CaO5/6 cluster in the oxygen-evolving complex (OEC) embedded in photosystem II (PSII). During the catalytic process, the oxygen-evolving complex (OEC) advances through a series of five “Si states” (i=0–4) (Figure 1a).
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