scholarly journals Photodynamic activity attained through the ruptured π-conjugation of pyridyl groups with a porphyrin macrocycle: synthesis and the photophysical and photobiological evaluation of 5-mono-(4-nitrophenyl)-10,15,20-tris-[4-(phenoxymethyl)pyridine]-porphyrin and its Zn(ii) complex

2020 ◽  
Vol 19 (12) ◽  
pp. 1776-1789
Author(s):  
Zeaul H. Mazumder ◽  
Debdulal Sharma ◽  
Devashish Sengupta ◽  
Avinaba Mukherjee ◽  
Jayanta Sarmah Boruah ◽  
...  
Keyword(s):  
Zinc Complex ◽  
Metal Free ◽  
Porphyrin Macrocycle ◽  
Active Metal ◽  
Photodynamic Activity

This article compares a hydrophobic and photobiologically inert porphyrin synthon, (NPh)TPyPz, bearing a single meso-4-nitrophenyl group and three meso-pyridyl groups with a new photobiologically active metal-free porphyrin, P3N, and its zinc-complex, P3NZn.

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.

Nitrogen-doped carbon nanotubes as a highly active metal-free catalyst for nitrobenzene hydrogenation

2020 ◽  
Vol 260 ◽  
pp. 118105 ◽  
Author(s):  
Wei Xiong ◽  
Zening Wang ◽  
Shilong He ◽  
Fang Hao ◽  
Yongzhe Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Nitrobenzene Hydrogenation ◽  
Highly Active ◽  
Active Metal ◽  
Nitrogen Doped Carbon

Carbon fragments as highly active metal-free catalysts for the oxygen reduction reaction: a mechanistic study

Nanoscale ◽  
2019 ◽  
Vol 11 (41) ◽  
pp. 19422-19428 ◽  
Author(s):  
Keke Mao ◽  
Wei Zhang ◽  
Jun Dai ◽  
Xiao Cheng Zeng
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Group Symmetry ◽  
Mechanistic Study ◽  
Metal Free ◽  
Highly Active ◽  
Active Metal

Carbon fullerene fragments with low group-symmetry are highly active catalysts for the oxygen reduction reaction.

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