(NO3)3 (terpy = 2,2′

6,2′′- terpyridine) and its relevance to the oxygen-evolving complex of photosystem II examined through pH dependent cyclic voltammetry

Clyde W. Cady, Katherine E. Shinopoulos, Robert H. Crabtree, Gary W Brudvig

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Photosynthetic water oxidation occurs naturally at a tetranuclear manganese center in the photosystem II protein complex. Synthetically mimicking this tetramanganese center, known as the oxygen-evolving complex (OEC), has been an ongoing challenge of bioinorganic chemistry. Most past efforts have centered on water-oxidation catalysis using chemical oxidants. However, solar energy applications have drawn attention to electrochemical methods. In this paper, we examine the electrochemical behavior of the biomimetic water-oxidation catalyst [(H2O)(terpy)Mn(μ-O)2Mn(terpy)(H2O)](NO 3)3 [terpy = 2,2′:6′,2′′- terpyridine] (1) in water under a variety of pH and buffered conditions and in the presence of acetate that binds to 1 in place of one of the terminal water ligands. These experiments show that 1 not only exhibits proton-coupled electron-transfer reactivity analogous to the OEC, but also may be capable of electrochemical oxidation of water to oxygen.

Original languageEnglish
Pages (from-to)3985-3989
Number of pages5
JournalDalton Transactions
Volume39
Issue number16
DOIs
Publication statusPublished - 2010

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Photosystem II Protein Complex
Cyclic voltammetry
Oxygen
Water
Oxidation
Bioinorganic Chemistry
Solar Energy
Biomimetics
Electrochemical oxidation
Manganese
Catalysis
Oxidants
Solar energy
Protons
Acetates
Electrons
Ligands
Catalysts
Experiments

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Medicine(all)

Cite this

(NO3)3 (terpy = 2,2′ : 6,2′′- terpyridine) and its relevance to the oxygen-evolving complex of photosystem II examined through pH dependent cyclic voltammetry. / Cady, Clyde W.; Shinopoulos, Katherine E.; Crabtree, Robert H.; Brudvig, Gary W.

In: Dalton Transactions, Vol. 39, No. 16, 2010, p. 3985-3989.

Research output: Contribution to journalArticle

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