LASER FLASH SPECTROSCOPY OF METHYLENE BLUE WITH NUCLEIC ACIDS

1987 ◽  
Vol 45 (2) ◽  
pp. 167-175 ◽  
Author(s):  
John M. Kelly ◽  
Wilhelm J. M. Putten ◽  
David J. Mcconnell
Keyword(s):  
Methylene Blue ◽  
Nucleic Acids ◽  
Laser Flash ◽  
Flash Spectroscopy

Photochemical Electron Transfer in the System Polypyrrole-Methylene Blue

1994 ◽  
Vol 47 (6) ◽  
pp. 1163 ◽  
Author(s):  
D Matthews ◽  
A Altus ◽  
A Hope
Keyword(s):  
Methylene Blue ◽  
Electron Transfer ◽  
Absorption Spectrum ◽  
Absorption Spectra ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Vitamin K1 ◽  
Photochemical Reduction ◽  
Long Chain

Methylene Blue incorporated into colloidal oxidized polypyrrole was investigated by absorption spectroscopy and laser flash photolysis. The absorption spectra of Methylene Blue and polypyrrole were unaffected by incorporation. Flash photolysis transients of Methylene Blue and triplet Methylene Blue in ethanol were affected by 1,4-benzoquinone and 1,4-benzoquinol but not by the long-chain naphthoquinone Vitamin K1. Incorporation of Methylene Blue in polypyrrole produced distinct changes in the flash photolysis transients of Methylene Blue and triplet Methylene Blue. Very long-lived transients, with lifetimes of the order of 10 ms, were observed. These effects were accompanied by long-lived changes in the absorption spectrum of Methylene Blue. The transients were modified by the addition of 1,4-benzoquinone but not 1,4-benzoquinol. The results indicate photochemical reduction of oxidized polypyrrole by triplet Methylene Blue with the production of stable long-lived species capable of reducing 1,4-benzoquinone.

Laser flash spectroscopy of tris(2,2'-bipyridine)ruthenium(II) in solution

1976 ◽  
Vol 98 (12) ◽  
pp. 3722-3724 ◽  
Author(s):  
R. Bensasson ◽  
C. Salet ◽  
V. Balzani
Keyword(s):  
Laser Flash ◽  
Flash Spectroscopy

Laser flash spectroscopy of iodine and iodoform

1973 ◽  
Vol 21 (1) ◽  
pp. 133-136 ◽  
Author(s):  
A. Van Den Ende ◽  
S. Kimel ◽  
S. Speiser
Keyword(s):  
Laser Flash ◽  
Flash Spectroscopy
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