Desulfurization and Denitrogenation of Light Oils by Methyl Viologen-Modified Aluminosilicate Adsorbent

2004 ◽  
Vol 18 (5) ◽  
pp. 1400-1404 ◽  
Author(s):  
Yasuhiro Shiraishi ◽  
Azumi Yamada ◽  
Takayuki Hirai
Keyword(s):  
Methyl Viologen ◽  
Aluminosilicate Adsorbent

Reactions of methyl viologen and nitrite with thiourea dioxide. New opportunities for an old reductant

2002 ◽  
pp. 4074-4076 ◽  
Author(s):  
Sergei V. Makarov ◽  
Evgeny V. Kudrik ◽  
Rudi van Eldik ◽  
Ekaterina V. Naidenko
Keyword(s):  
Methyl Viologen ◽  
Thiourea Dioxide

Electrocatalytic reduction of benzoylformic acid mediated by methyl viologen

1995 ◽  
Vol 36 (15) ◽  
pp. 2637-2638 ◽  
Author(s):  
Joon Woo Park ◽  
Moon Hee Choi ◽  
Kwanghee Koh Park
Keyword(s):  
Methyl Viologen ◽  
Electrocatalytic Reduction

The C60-Photosensitized Reduction of Methyl Viologen Through the Intermediary of O2

2001 ◽  
Vol 74 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Toshifumi Konishi ◽  
Mamoru Fujitsuka ◽  
Osamu Ito ◽  
Yasumasa Toba ◽  
Yoshiharu Usui
Keyword(s):  
Methyl Viologen

Spectroelectrochemistry of Methyl Viologen/Iodide Solutions at Mercury Film Electrodes

Langmuir ◽  
1996 ◽  
Vol 12 (20) ◽  
pp. 4905-4908 ◽  
Author(s):  
R. O. Lezna ◽  
S. A. Centeno
Keyword(s):  
Methyl Viologen ◽  
Mercury Film

Photochemistry of Free-Base Porphyrin Linked to Methyl Viologen

1992 ◽  
Vol 57 (1) ◽  
pp. 26-32 ◽  
Author(s):  
N. M. Guindy ◽  
F. M. Elzawawy ◽  
D. Y. Sabry
Keyword(s):  
Methyl Viologen ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Phenyl Group ◽  
Laser Flash ◽  
Porphyrin Ring ◽  
Free Base ◽  
Intramolecular Quenching ◽  
Quenching Efficiency ◽  
Triton X

The photochemistry of free-base meso-tetraphenylporphyrin linked to methyl viologen via an alkoxy chain (n = 3) at the ortho, meta or para-position of one meso-phenyl group, in Triton X-100 micellar aqueous solutions is reported. The appended viologen does not quench the porphyrin fluorescence nor its triplet excited state due to the different solubilization of both parts of the molecule in the medium where the porphyrin ring resides in the hydrophobic phase and the alkoxy linker protrudes into the rather diffuse outer phase of detergent oxyethylene units, while the viologen moiety penetrates into the aqueous layer. However, laser flash photolysis measurements show that in the presence of nicotinamide dinucleotide, NADH, the porphyrin ring is reduced to phlorin due to the penetration of NADH into the organic phase. For porphyrin-tetraviologen in which a viologen molecule is linked to each of the porphyrin meso-position via alkoxy chain, fluorescence quenching could be achieved. The values of the quenching efficiency are high (94% in acetonitrile) compared to intramolecular quenching and are dependent upon the solvent viscosity.

Do equilibrium and rate constants of intramicellar reactions depend on micelle size ?

2021 ◽  
Author(s):  
Tim Kohlmann ◽  
Martin Goez
Keyword(s):  
Rate Constants ◽  
Methyl Viologen ◽  
Alkyl Sulfate ◽  
Dynamic Quenching ◽  
Micelle Size ◽  
Static And Dynamic Quenching

We have studied the combined static and dynamic quenching of pyrene by methyl viologen in sodium alkyl sulfate micelles varying in volume by a factor of more than 4. Size...

Photosensitized Reduction of Methyl Viologen Using Eosin-Y in Presence of a Sacrificial Electron Donor in Water–Alcohol Mixture

2000 ◽  
Vol 71 (6) ◽  
pp. 675 ◽  
Author(s):  
Shafiqul D.-M. Islam ◽  
Toshifumi Konishi ◽  
Mamoru Fujitsuka ◽  
Osamu Ito ◽  
Yuko Nakamura ◽  
...  
Keyword(s):  
Electron Donor ◽  
Methyl Viologen ◽  
Eosin Y ◽  
Alcohol Mixture ◽  
Water Alcohol
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