Results 171 to 180 of about 76,963 (249)
Some of the next articles are maybe not open access.
Angewandte Chemie, 2021
Nature uses Fe porphyrin sites for the oxygen reduction reaction (ORR). Synthetic Fe porphyrins have been extensively studied as ORR catalysts, but activity improvement is required.
Lisi Xie +10 more
semanticscholar +1 more source
Nature uses Fe porphyrin sites for the oxygen reduction reaction (ORR). Synthetic Fe porphyrins have been extensively studied as ORR catalysts, but activity improvement is required.
Lisi Xie +10 more
semanticscholar +1 more source
Coordination chemistry of expanded porphyrins
Coordination Chemistry Reviews, 2019Expanded porphyrins are a class of porphyirinoid macrocycles possessing more than four pyrrole/other heterocyclic rings and multiple meso-carbon bridges in their conjugated structural frame-work.
Vijayendra S Shetti +1 more
exaly +2 more sources
Applications of porphyrins in emerging energy conversion technologies
, 2020Porphyrins are composed of four pyrrolic subunits interconnected via methine bridges to form fully conjugated 18 π electron-containing aromatic macrocycles.
Jong Min Park, Jeong Heon Lee, W. Jang
semanticscholar +1 more source
Journal of the American Chemical Society, 2020
The development and improvement of electrocatalysts for the 4H+/4e- reduction of O2 to H2O is an ongoing challenge. The addition of ancillary groups (e.g., hydrogen bonding, Brønsted acid/base) near the active site of metal-containing catalysts is an ...
Rui Zhang, J. Warren
semanticscholar +1 more source
The development and improvement of electrocatalysts for the 4H+/4e- reduction of O2 to H2O is an ongoing challenge. The addition of ancillary groups (e.g., hydrogen bonding, Brønsted acid/base) near the active site of metal-containing catalysts is an ...
Rui Zhang, J. Warren
semanticscholar +1 more source
Self-assembly of porphyrin–azulene–porphyrin and porphyrin–azulene conjugates
Organic & Biomolecular Chemistry, 2009In this paper we report the synthesis and self-assembling behavior of new porphyrin-azulene-porphyrin and porphyrin-azulene conjugates. The porphyrin-azulene-porphyrin conjugate gelates a number of organic solvents, while the porphyrin-azulene conjugates form vesicles in a chloroform-methanol binary mixture.
Ze-Yun, Xiao +3 more
openaire +2 more sources
American Journal of Industrial Medicine, 2002
AbstractBackgroundTo evaluate the possible effect of inorganic arsenic (iAs) and of its species on the urinary excretion of porphyrin homologues.MethodsTotal porphyrins and their homologues (copro, penta, hexa, hepta, uroporphyrins) and arsenic species (trivalent and pentavalent As; monomethyl arsonic acid; dimethyl arsinic acid; arsenobetaine) were ...
APOSTOLI, Pietro +3 more
openaire +3 more sources
AbstractBackgroundTo evaluate the possible effect of inorganic arsenic (iAs) and of its species on the urinary excretion of porphyrin homologues.MethodsTotal porphyrins and their homologues (copro, penta, hexa, hepta, uroporphyrins) and arsenic species (trivalent and pentavalent As; monomethyl arsonic acid; dimethyl arsinic acid; arsenobetaine) were ...
APOSTOLI, Pietro +3 more
openaire +3 more sources
Accounts of Chemical Research, 2018
In order to fabricate efficient molecular photonic devices, it has been a long-held aspiration for chemists to understand and mimic natural light-harvesting complexes where a rapid and efficient transfer of excitation energy between chlorophyll pigments is observed.
Rahul Dev Mukhopadhyay +3 more
openaire +3 more sources
In order to fabricate efficient molecular photonic devices, it has been a long-held aspiration for chemists to understand and mimic natural light-harvesting complexes where a rapid and efficient transfer of excitation energy between chlorophyll pigments is observed.
Rahul Dev Mukhopadhyay +3 more
openaire +3 more sources
Synthesis, self-assembly and applications of functional polymers based on porphyrins
Progress in polymer science, 2019Porphyrins and their derivatives have attracted great attention due to their unique properties and diverse functionalities which contribute to their wide applications such as catalysis, solar cells, biomedicine and environmental science.
Jia Tian, Weian Zhang
semanticscholar +1 more source
Nanotechnology, 2012
A new cationic silver N-alkylpyridylporphyrin complex is able to 'sense' nanometric conductive particles with a diameter below 10 nm. The luminescence of the molecule changes its maximum from red to blue when it embraces a conductive (metallic or semiconducting) nanoparticle.
G A M, Safar +5 more
openaire +2 more sources
A new cationic silver N-alkylpyridylporphyrin complex is able to 'sense' nanometric conductive particles with a diameter below 10 nm. The luminescence of the molecule changes its maximum from red to blue when it embraces a conductive (metallic or semiconducting) nanoparticle.
G A M, Safar +5 more
openaire +2 more sources