ArticlePhotosynthesis research
Hypothesis: the peroxydicarbonic acid cycle in photosynthetic oxygen evolution.
Article in Photosynthesis research. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Bicarbonate is a key regulator but not a substrate for OPhotosynthesis research · 2024Review
- Paul A. Castelfranco (1921-2021): a scientist par excellence, a man of lasting faith, and ever a humanist.Photosynthesis research · 2023Article
- A proposed role for inorganic carbon in water oxidation.Photosynthesis research · 2013Article
- Photosystem II: The machinery of photosynthetic water splitting.Photosynthesis researchReview
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Authors and funding
3 authors.
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Abstract
Peroxydicarbonic acid (Podca), a proposed intermediate in photosynthetic oxygen evolution, was synthesized electrochemically. Consistent with literature descriptions of this compound, it was shown to be a highly reactive molecule, spontaneously hydrolyzed to H2O2, as well as susceptible to oxidative and reductive decomposition. In the presence of Mn2+ or Co2+, Podca was quickly broken down with release of O2. The liberation of O2, however, was partially suppressed at high O2 concentrations. In the presence of Ca-washed photosystem II-enriched membranes lacking extrinsic proteins, Podca was decomposed with the release of O2, but only under conditions favoring photosynthetic electron flow (light plus a Hill oxidant). A model is proposed that details how peroxydicarbonic acid could act as an oxygen-evolving intermediate. The hypothesis is consistent with the well-established Kok model and with recent findings related to the chemistry of oxygen evolution.
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Registered trials
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