Characterization of the excited-state reactivity of a persistent aryl-substituted allyl free radical

1993 ◽  
Vol 97 (50) ◽  
pp. 13341-13347 ◽  
Author(s):  
David T. Breslin ◽  
Marye Anne Fox
Keyword(s):  
Excited State ◽  
Free Radical

Free radical scavenging properties and phenolic characterization of some edible plants

2009 ◽  
Vol 114 (1) ◽  
pp. 276-281 ◽  
Author(s):  
Ilkay Orhan ◽  
Murat Kartal ◽  
Mahmoud Abu-Asaker ◽  
F. Sezer Şenol ◽  
Gülderen Yilmaz ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Edible Plants ◽  
Radical Scavenging Properties

Synthesis and Characterization of Some Novel Homo- and Hetero-Diradicals of Hydrazyl and Nitroxide Type

2007 ◽  
Vol 60 (3) ◽  
pp. 173 ◽  
Author(s):  
Petre Ionita ◽  
Floriana Tuna ◽  
Marius Andruh ◽  
Titus Constantinescu ◽  
Alexandru T. Balaban
Keyword(s):  
Free Radical ◽  
Potassium Permanganate ◽  
Lead Dioxide ◽  
Magnetic Behaviour ◽  
Synthesis And Characterization ◽  
Stable Free Radical ◽  
Ms Analysis ◽  
New Compounds

Starting from the well known stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH; 2a) and its congener 2,2-diphenyl-1-(4-cyano-2,6-dinitrophenyl)hydrazyl 2b, or from their reduced hydrazine counterparts 1a,b, it was possible to obtain the p-quinonoid compounds 4a,b by oxidation with ceric (Ce4+) sulfate, which by reduction gave the corresponding hydroxyl derivatives 2-phenyl-2-(4-hydroxyphenyl)-1-picrylhydrazine 5a or 2-phenyl-2-(4-hydroxyphenyl)-1-(4-cyano-2,6-dinitrophenyl)hydrazine 5b. These hydroxyl derivatives (5a,b) react with 4-carboxy-TEMPO or 2,2-diphenyl-1-(4-carboxy-2,6-dinitrophenyl)hydrazine to form the corresponding esters 6a,b or 8a,b. These esters (6a,b and 8a,b) lead to the hybrid hetero diradicals (nitroxide–hydrazyl type) 7a,b or homo biradicals (hydrazyl–hydrazyl type) 9a,b by oxidation with lead dioxide or potassium permanganate. The new compounds were characterized by UV-vis, NMR, EPR, and MS analysis, and their magnetic behaviour was investigated.

Synthesis and characterization of hyperbranched associative polyacrylamide

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39522-39529 ◽  
Author(s):  
Wanfen Pu ◽  
Daijun Du ◽  
Rui Liu ◽  
Jiongyi Gu ◽  
Kewei Li ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Functional Monomer ◽  
Free Radical Copolymerization ◽  
Ultrafine Silica ◽  
Hyperbranched Polyamide

HDPAM was synthesized by water free-radical copolymerization based on functional hyperbranched polyamide-modified ultrafine silica as functional monomer.

Substitution Effect on 2-(Oxazolinyl)-phenols: Emission Color-Tunable, Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-based Luminophores

2021 ◽  
Author(s):  
Dominik Göbel ◽  
Pascal Rusch ◽  
Daniel Duvinage ◽  
Tim Stauch ◽  
Nadja C. Bigall ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excited State ◽  
Solid State ◽  
Substitution Effect ◽  
Optical Characterization ◽  
Intramolecular Proton Transfer ◽  
Substitution Pattern ◽  
Emission Color ◽  
Color Tunable

The synthesis and optical characterization of novel single-benzene ESIPT-based fluorophores is described in solid state and in solution. Special attention is given towards the influence of their unique substitution pattern on their optical properties. Depending on this pattern, aggregation induced emission or aggregation caused quenching (ACQ) is observed in the solid state.<br>

Femtosecond Optical Characterization of the Excited State of Rhodobacter Capsulatus DLL

1992 ◽  
pp. 237-243
Author(s):  
Marten H. Vos ◽  
Fabrice Rappaport ◽  
Jean-Christophe Lambry ◽  
Jacques Breton ◽  
Jean-Louis Martin
Keyword(s):  
Excited State ◽  
Rhodobacter Capsulatus ◽  
Optical Characterization
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