Regioselective Dye-Induced Photocleavage of Epoxides as an Alternative Mild Synthetic Route to a Targeted Alcohol Functionality

2015 ◽  
Vol 68 (3) ◽  
pp. 500 ◽  
Author(s):  
Anthony A. Provatas ◽  
Gary A. Epling ◽  
James D. Stuart ◽  
Aliaksandr Yeudakimau
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Ring Opening ◽  
Radical Anion ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Hydroxyl Group ◽  
Synthetic Approach ◽  
Synthetic Route ◽  
Toxic Dyes

The regioselective cleavage of epoxides using visible light and a catalytic dye is reported in this study as an alternative mild synthetic approach. The epoxide radical anion is generated via visible light in an electron transfer reaction, induced by non-toxic dyes, leading to ring opening and formation of the corresponding alcohol with the hydroxyl group on the less substituted carbon in excellent yields.

Photoreactivity of ZnO nanoparticles in visible light: Effect of surface states on electron transfer reaction

2009 ◽  
Vol 105 (7) ◽  
pp. 074308 ◽  
Author(s):  
Sunandan Baruah ◽  
Sudarson Sekhar Sinha ◽  
Barnali Ghosh ◽  
Samir Kumar Pal ◽  
A. K. Raychaudhuri ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Zno Nanoparticles ◽  
Transfer Reaction ◽  
Surface States ◽  
Electron Transfer Reaction ◽  
Light Effect ◽  
Effect Of Surface

[Cr(ttpy)2]3+ as a multi-electron reservoir for photoinduced charge accumulation

2019 ◽  
Vol 48 (20) ◽  
pp. 6800-6811 ◽  
Author(s):  
Rajaa Farran ◽  
Long Le-Quang ◽  
Jean-Marie Mouesca ◽  
Vincent Maurel ◽  
Damien Jouvenot ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Tertiary Amine ◽  
Visible Light Irradiation ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Light Irradiation ◽  
Charge Accumulation ◽  
Photoinduced Charge

Under visible light irradiation [Cr(ttpy)2]3+ can be reduced twice by a tertiary amine; the photoreduction processes are accelerated in the presence of [Ru(bpy)3]2+ acting as an antenna thanks to an efficient electron transfer reaction from [Ru(bpy)3]2+* to [Cr(ttpy)2]3+.

scholarly journals Electron transfer studies of a conventional redox probe in human sweat and saliva bio-mimicking conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
P. Krishnaveni ◽  
V. Ganesh
Keyword(s):  
Electron Transfer ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Redox Couple ◽  
Liquid Crystalline Phase ◽  
Transfer Reactions ◽  
Redox Probe ◽  
Human Sweat

AbstractModern day hospital treatments aim at developing electrochemical biosensors for early diagnosis of diseases using unconventional human bio-fluids like sweat and saliva by monitoring the electron transfer reactions of target analytes. Such kinds of health care diagnostics primarily avoid the usage of human blood and urine samples. In this context, here we have investigated the electron transfer reaction of a well-known and commonly used redox probe namely, potassium ferro/ferri cyanide by employing artificially simulated bio-mimics of human sweat and saliva as unconventional electrolytes. Typically, electron transfer characteristics of the redox couple, [Fe(CN)6]3−/4− are investigated using electrochemical techniques like cyclic voltammetry and electrochemical impedance spectroscopy. Many different kinetic parameters are determined and compared with the conventional system. In addition, such electron transfer reactions have also been studied using a lyotropic liquid crystalline phase comprising of Triton X-100 and water in which the aqueous phase is replaced with either human sweat or saliva bio-mimics. From these studies, we find out the electron transfer reaction of [Fe(CN)6]3−/4− redox couple is completely diffusion controlled on both Au and Pt disc shaped electrodes in presence of sweat and saliva bio-mimic solutions. Moreover, the reaction is partially blocked by the presence of lyotropic liquid crystalline phase consisting of sweat and saliva bio-mimics indicating the predominant charge transfer controlled process for the redox probe. However, the rate constant values associated with the electron transfer reaction are drastically reduced in presence of liquid crystalline phase. These studies are essentially carried out to assess the effect of sweat and saliva on the electrochemistry of Fe2+/3+ redox couple.

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