scholarly journals Photo-heterolysis and -homolysis of substituted diphenylmethyl halides, acetates, and phenyl ethers in acetonitrile: characterization of diphenylmethyl cations and radicals generated by 248-nm laser flash photolysis

1990 ◽  
Vol 112 (19) ◽  
pp. 6918-6928 ◽  
Author(s):  
J. Bartl ◽  
S. Steenken ◽  
H. Mayr ◽  
R. A. McClelland
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Phenyl Ethers

scholarly journals Fragmentation of a dioxolanyl radical via nonstatistical reaction dynamics: characterization of the vinyloxy radical by ns time-resolved laser flash photolysis

2018 ◽  
Vol 20 (30) ◽  
pp. 19819-19828
Author(s):  
Götz Bucher ◽  
Mukul Lal ◽  
Anup Rana ◽  
Michael Schmittel
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Reaction Dynamics ◽  
Laser Flash ◽  
Time Resolved

Photolysis of a dioxolanyl Barton ester results in formation of the vinyloxy radical, via nonstatistical reaction dynamics. The nonstatistical reaction involves ester cleavage, CO2 loss and fragmentation of the intermediate dioxolanyl radical.

Formation and Direct Detection of Non-Conjugated Triplet 1,2-Biradical from β,γ-Vinylarylketone

2015 ◽  
Vol 68 (11) ◽  
pp. 1707 ◽  
Author(s):  
H. Dushanee M. Sriyarathne ◽  
Kosala R. S. Thenna-Hewa ◽  
Tianeka Scott ◽  
Anna D. Gudmundsdottir
Keyword(s):  
Rate Constant ◽  
Density Functional ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Direct Detection ◽  
Density Functional Theory Calculations ◽  
Laser Flash ◽  
Triplet Excited State ◽  
Functional Theory

Laser flash photolysis of 2-methyl-1-phenylbut-3-en-1-one (1) conducted at irradiation wavelengths of 266 and 308 nm results in the formation of triplet 1,2-biradical 2 that has λmax at 370 and 480 nm. Biradical 2 is formed with a rate constant of 1.1 × 107 s–1 and decays with a rate constant of 2.3 × 105 s–1. Isoprene-quenching studies support the notion that biradical 2 is formed by energy transfer from the triplet-excited state of the ketone chromophore of 1. Density functional theory calculations were used to verify the characterization of triplet biradical 2 and validate the mechanism for its formation. Thus, it has been demonstrated that intramolecular sensitization of simple alkenes can be used to form triplet 1,2-biradicals with the two radical centres localized on the adjacent carbon atoms.

CHARACTERIZATION OF A MICROSECOND INTERMEDIATE IN THE LASER FLASH PHOTOLYSIS OF SMALL PHYTOCHROME FROM OAT

1980 ◽  
Vol 31 (4) ◽  
pp. 417-420 ◽  
Author(s):  
Silvia E. Braslavsky, ◽  
J. Ioan Matthews, ◽  
Hans J. Herbert, ◽  
Jacob Kok ◽  
Carel J. P. Spruit ◽  
...  
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash
Sign in / Sign up

Export Citation Format

Share Document