Frontispiece: Redox Active Metal- and Covalent Organic Frameworks for Energy Storage: Balancing Porosity and Electrical Conductivity

Thermochemical energy storage (TCES) offers the potential for greatly increased storage density relative to sensible-only energy storage. Moreover, heat may be stored indefinitely in the form of chemical bonds via TCES, accessed upon demand, and converted to heat at temperatures significantly higher than current solar thermal electricity production technology and is therefore well-suited to more efficient high-temperature power cycles. The PROMOTES effort seeks to advance both materials and systems for TCES through the development and demonstration of an innovative storage approach for solarized Air-Brayton power cycles and that is based on newly-developed redox-active metal oxides that are mixed ionic-electronic conductors (MIEC). In this paper we summarize the system concept and review our work to date towards developing materials and individual components.

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The emerging molecular structure of the nitrogen cycle: an introduction to the proceedings of the 10th annual N-cycle meeting

Biochemical Society Transactions ◽

10.1042/bst0330113 ◽

2005 ◽

Vol 33 (1) ◽

pp. 113-118 ◽

Cited By ~ 12

Author(s):

C.S. Butler ◽

D.J. Richardson

Keyword(s):

Structural Biology ◽

Nitrogen Cycle ◽

Reaction Mechanisms ◽

Spectroscopic Analysis ◽

Three Dimensional ◽

Chemical Transformations ◽

Redox Active ◽

Active Metal ◽

Insight Into ◽

Redox Active Metal

Over the last 10 years, during the lifetime of the nitrogen cycle meetings, structural biology, coupled with spectroscopy, has had a major impact of our understanding enzymology of the nitrogen cycle. The three-dimensional structures for many of the key enzymes have now been resolved and have provided a wealth of information regarding the architecture of redox active metal sites, as well as revealing novel structural folds. Coupled with structure-based spectroscopic analysis, this has led to new insight into the reaction mechanisms of the diverse chemical transformations that together cycle nitrogen in the biosphere. An overview of the some of the key developments in field over the last decade is presented.

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Confining the spin between two metal atoms within the carbon cage: redox-active metal–metal bonds in dimetallofullerenes and their stable cation radicals

Nanoscale ◽

10.1039/c7nr02288c ◽

2017 ◽

Vol 9 (23) ◽

pp. 7977-7990 ◽

Cited By ~ 23

Author(s):

Nataliya A. Samoylova ◽

Stanislav M. Avdoshenko ◽

Denis S. Krylov ◽

Hannah R. Thompson ◽

Amelia C. Kirkhorn ◽

...

Keyword(s):

Carbon Cage ◽

Cation Radicals ◽

Metal Atoms ◽

Redox Active ◽

Active Metal ◽

Metal Metal ◽

Metal Metal Bonds ◽

Metal Bonds ◽

Redox Active Metal

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Dioxygen-derived radicals in biological systems

Philosophical Transactions of the Royal Society of London Series B Biological Sciences ◽

10.1098/rstb.1985.0167 ◽

1985 ◽

Vol 311 (1152) ◽

pp. 605-615 ◽

Cited By ~ 3

Keyword(s):

Respiratory Burst ◽

Electrochemical Method ◽

Culture Medium ◽

Biological Systems ◽

Cellular Systems ◽

Superoxide Ion ◽

Radical Species ◽

Redox Active ◽

Active Metal ◽

Redox Active Metal

Three instances of the involvement of dioxygen-derived radicals in biological systems are considered. The first concerns the formation of radicals in the haemolytic reactions induced by treatment of erythrocytes by phenylhydrazine, as an example of the so-called ‘oxidant drugs’. The evidence for the formation of phenyl radicals is considered and their origin in the oxidation of phenylhydrazine by a ferryl derivative of haemoglobin postulated. The relevance to the formation of phenylated iron and porphyrin species is described. It is suspected that many instances of oxidative damage to cellular systems result from the coincidence of unsequestered redox-active metal ions (particularly those of iron and copper), reductants, and dioxygen. As an example, the damage to hepatocytes, grown in a culture medium containing cysteine, is described. The formation of radical species derived from dioxygen during the respiratory burst associated with phagocytosis is discussed. A new electrochemical method of detecting the superoxide ion produced during the respiratory burst is described. Particular emphasis is placed on the relation between the production of radical species such as the hydroxyl radical and the superoxide ion, and the extent of phagocytosis.

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