The first pentanuclear heterobimetallic coordination cation with CeIII, CeIV and MnII

Najafpour, Mohammad Mahdi; Kozlevčar, Bojan; McKee, Vickie; Jagličić, Zvonko; Jagodič, Marko

doi:10.1016/j.inoche.2010.10.002

Cited by 41 publications

(18 citation statements)

References 25 publications

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“…16 The Y Z ∑ /Y Z potential is around 1.0 V. 10, 16 However, many of the oxidants used in water oxidation reactions (for example: ceric ammonium nitrate (1.4 V vs. NHE) or Oxone TM (1.7 V vs. NHE (normal hydrogen electrode) are more powerful than PSII. Najafpour et al 52 have found that Ce(IV) may act not only as a simple oxidant, but may simultaneously be coordinated. Najafpour et al 52 have found that Ce(IV) may act not only as a simple oxidant, but may simultaneously be coordinated.…”

Section: Oxidantmentioning

confidence: 99%

Oxygen evolving complex in Photosystem II: Better than excellent

Najafpour

Govindjee

2011

Dalton Trans.

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The Oxygen Evolving Complex in photosystem II, which is responsible for the oxidation of water to oxygen in plants, algae and cyanobacteria, contains a cluster of one calcium and four manganese atoms. This cluster serves as a model for the splitting of water by energy obtained from sunlight. The recent published data on the mechanism and the structure of photosystem II provide a detailed architecture of the oxygen-evolving complex and the surrounding amino acids. Biomimetically, we expect to learn some strategies from this natural system to synthesize an efficient catalyst for water oxidation, that is necessary for artificial photosynthesis.

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Section: Oxidantmentioning

confidence: 99%

Oxygen evolving complex in Photosystem II: Better than excellent

Najafpour

Govindjee

2011

Dalton Trans.

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“…2 On the other hand, many compounds decompose under water-oxidation conditions. 3 Heterogeneous metal oxides have exhibited efficient catalytic reactivity for water oxidation. 4 Among the different ions for water oxidation, Mn is promising, as it is inexpensive and environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

“…4 Among the different ions for water oxidation, Mn is promising, as it is inexpensive and environmentally friendly. 2,3 However, in addition to efficiency, the stability of catalysts is a very important issue. [5][6][7][8][9][10][11][12] Self-healing is defined as self-recovery of the initial properties of a compound following damage caused by the external environment or internal stresses, and is a promising strategy to stabilize efficient catalysts.…”

Section: Introductionmentioning

confidence: 99%

Self-healing for nanolayered manganese oxides in the presence of cerium(iv) ammonium nitrate: new findings

et al. 2015

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The self-healing reactions for metal oxides are among the most important reactions. For Mn oxides in the presence of cerium(IV) ammonium nitrate, Mn(II) and MnO 4 À combine and heal the Mn oxide. In the reaction, Mn(II) is formed from the reductive dissolution of the Mn oxide or by disproportionation of Mn(III) on the surface of the oxide. This Mn(II) is then oxidized by cerium(IV) ammonium nitrate to MnO 4 À . The MnO 4 À in the presence of Mn oxide oxidizes water or in a second pathway is reduced by Mn(II) to form Mn oxide. Here, we use the multivariate curve resolution-alternative least squares method for the first time to analyze spectroscopic data and obtain concentration profiles of cerium(IV) ammonium nitrate and MnO 4 À during the reaction under different conditions.

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“…However, the water-oxidation reaction is difficult due to thermodynamic and kinetic limitations [2,3]. Among many promising and efficient compounds for water oxidation [4][5][6][7][8], Mn compounds are attractive for water oxidation because Mn ion is not only used by Nature to oxidize water [9,10] but also the ion is environmentally friendly and low-cost [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%