All-PEGylated redox-active metal-free organic molecules in non-aqueous redox flow battery

2020 ◽  
Vol 8 (31) ◽  
pp. 15715-15724 ◽  
Author(s):  
Jingchao Chai ◽  
Amir Lashgari ◽  
Xiao Wang ◽  
Caroline K. Williams ◽  
Jianbing “Jimmy” Jiang
Keyword(s):  
Organic Molecules ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Active Materials ◽  
Metal Free ◽  
Redox Active ◽  
Active Metal ◽  
Molecular Sizes ◽  
The Stability ◽  
Redox Active Metal

A non-aqueous redox flow battery based on all-PEGylated, metal-free compounds is presented. The PEGylation enhances the stability of the redox-active materials, alleviating crossover by increasing the anolyte and catholyte species’ molecular sizes.

scholarly journals Increased Performance of an All-Organic Redox Flow Battery Model by Nitration of the [4]Helicenium DMQA Ion Electrolyte

2021 ◽  
Author(s):  
Jules Moutet ◽  
David Mills ◽  
Md Mubarak Hossain ◽  
Thomas L. Gianetti
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Organic Molecules ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Redox Flow Batteries ◽  
Battery Model ◽  
Recent Advances ◽  
Redox Active ◽  
Scalable Design

Redox Flow Batteries (RFBs) through their scalable design and virtually unlimited capacity, are promising candidates for large-scale energy storage. While recent advances in the development of redox-active bipolar organic molecules...

scholarly journals Catalytic oxidation of small organic molecules by cold plasma in solution in the presence of molecular iron complexes†

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Dariusz Śmiłowicz ◽  
Friederike Kogelheide ◽  
Anna Lena Schöne ◽  
Katharina Stapelmann ◽  
Peter Awakowicz ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Iron Complexes ◽  
Metal Free ◽  
H Nmr ◽  
Redox Active ◽  
Active Metal ◽  
Volatile Organic ◽  
Ft Ir ◽  
Free Oxidation ◽  
Redox Active Metal

AbstractThe plasma-mediated decomposition of volatile organic compounds has previously been investigated in the gas phase with metal oxides as heterogeneous catalysts. While the reactive species in plasma itself are well investigated, very little is known about the influence of metal catalysts in solution. Here, we present initial investigations on the time-dependent plasma-supported oxidation of benzyl alcohol, benzaldehyde and phenol in the presence of molecular iron complexes in solution. Products were identified by HPLC, ESI-MS, FT-IR, and $$^{1}\hbox {H NMR}$$ 1 H NMR spectroscopy. Compared to metal-free oxidation of the substrates, which is caused by reactive oxygen species and leads to a mixture of products, the metal-mediated reactions lead to one product cleanly, and faster than in the metal-free reactions. Most noteworthy, even catalytic amounts of metal complexes induce these clean transformations. The findings described here bear important implications for plasma-supported industrial waste transformations, as well as for plasma-mediated applications in biomedicine, given the fact that iron is the most abundant redox-active metal in the human body.

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

2005 ◽  
Vol 33 (1) ◽  
pp. 113-118 ◽  
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.

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

Nanoscale ◽  
2017 ◽  
Vol 9 (23) ◽  
pp. 7977-7990 ◽  
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

Dioxygen-derived radicals in biological systems

1985 ◽  
Vol 311 (1152) ◽  
pp. 605-615 ◽  
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.

scholarly journals Negative cooperativity upon hydrogen bond-stabilized O2 adsorption in a redox-active metal–organic framework

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Julia Oktawiec ◽  
Henry Z. H. Jiang ◽  
Jenny G. Vitillo ◽  
Douglas A. Reed ◽  
Lucy E. Darago ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Metal Organic Framework ◽  
Negative Cooperativity ◽  
O2 Adsorption ◽  
Redox Active ◽  
Active Metal ◽  
Metal Organic ◽  
Redox Active Metal ◽  
Organic Framework

Synthesis, characterization and biochemical studies of redox active metal complexes with flavone derivative

2020 ◽  
Author(s):  
Jyothi R R Krishna ◽  
J. Michael Ahitha Jose ◽  
E.H. Edinsha Gladis ◽  
K. Nagashri ◽  
J. Joseph
Keyword(s):  
Metal Complexes ◽  
Redox Active ◽  
Active Metal ◽  
Biochemical Studies ◽  
Flavone Derivative ◽  
Redox Active Metal

scholarly journals Spectroscopic and theoretical investigation of the [Fe2(bdt)(CO)6] hydrogenase mimic and some catalyst intermediates

2019 ◽  
Vol 21 (27) ◽  
pp. 14638-14645 ◽  
Author(s):  
J. P. H. Oudsen ◽  
B. Venderbosch ◽  
D. J. Martin ◽  
T. J. Korstanje ◽  
J. N. H. Reek ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Metal Center ◽  
Redox Active ◽  
Active Metal ◽  
Redox Active Metal

In [Fe–Fe] hydrogenase mimic systems the ene-1,2-dithiolene ligands play an important role in the stabilisation of the redox-active metal center.

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