O2 Reduction by Iron Porphyrins with Electron Withdrawing Groups: To Scale or not to Scale

2021 ◽  
Author(s):  
Sk Amanullah ◽  
Paramita Saha ◽  
Abhishek Dey
Keyword(s):  
Iron Porphyrins ◽  
O2 Reduction ◽  
The Relationship

Iron porphyrins are synthesized by systematically introducing electron withdrawing groups (EWGs) on pyrroles to evaluate the relationship between rate (k) and overpotential (η). The results indicate that while EWGs lead...

Molecular Catalysis of O2 Reduction by Iron Porphyrins in Water: Heterogeneous versus Homogeneous Pathways

2015 ◽  
Vol 137 (42) ◽  
pp. 13535-13544 ◽  
Author(s):  
Cyrille Costentin ◽  
Hachem Dridi ◽  
Jean-Michel Savéant
Keyword(s):  
Iron Porphyrins ◽  
O2 Reduction ◽  
Molecular Catalysis

scholarly journals Rational Design of Mononuclear Iron Porphyrins for Facile and Selective 4e–/4H+ O2 Reduction: Activation of O–O Bond by 2nd Sphere Hydrogen Bonding

2018 ◽  
Vol 140 (30) ◽  
pp. 9444-9457 ◽  
Author(s):  
Sarmistha Bhunia ◽  
Atanu Rana ◽  
Pronay Roy ◽  
Daniel J. Martin ◽  
Michael L. Pegis ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Rational Design ◽  
Iron Porphyrins ◽  
Mononuclear Iron ◽  
O2 Reduction

The relationship between enthalpy changes and oxygenation constants for cobalt and iron porphyrins

1983 ◽  
Vol 78 ◽  
pp. 181-189 ◽  
Author(s):  
Calvin M. Wicker ◽  
Roger D. Morgan ◽  
D.Paul Rillema
Keyword(s):  
Iron Porphyrins ◽  
Enthalpy Changes ◽  
The Relationship

scholarly journals Influence of the distal guanidine group on the rate and selectivity of O2 reduction by iron porphyrin

2019 ◽  
Vol 10 (42) ◽  
pp. 9692-9698 ◽  
Author(s):  
Arnab Ghatak ◽  
Snehadri Bhakta ◽  
Sarmistha Bhunia ◽  
Abhishek Dey
Keyword(s):  
Reduction Reaction ◽  
Iron Porphyrin ◽  
Iron Porphyrins ◽  
Guanidine Group ◽  
O2 Reduction

The O2 reduction reaction (ORR) catalysed by iron porphyrins with covalently attached pendant guanidine groups is reported.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Choosing a Markov blanket

2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr
Keyword(s):  
Markov Blanket ◽  
Target Article ◽  
The Relationship

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.

Tinkering with cognitive gadgets: Cultural evolutionary psychology meets active inference

2019 ◽  
Vol 42 ◽  
Author(s):  
Paul Benjamin Badcock ◽  
Axel Constant ◽  
Maxwell James Désormeau Ramstead
Keyword(s):  
Evolutionary Psychology ◽  
Research Program ◽  
Active Inference ◽  
Innovative Research ◽  
Cognitive Faculties ◽  
Cultural Evolutionary ◽  
The Relationship

Abstract Cognitive Gadgets offers a new, convincing perspective on the origins of our distinctive cognitive faculties, coupled with a clear, innovative research program. Although we broadly endorse Heyes’ ideas, we raise some concerns about her characterisation of evolutionary psychology and the relationship between biology and culture, before discussing the potential fruits of examining cognitive gadgets through the lens of active inference.

Sign in / Sign up

Export Citation Format

Share Document