scholarly journals Laser Flash Photolysis Studies of Copolymers of Phenyl Vinyl Ketone and Vinylnaphthalene in Benzene Solution

1977 ◽  
Vol 9 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Koichiro Hayashi ◽  
Masahiro Irie ◽  
John Kiwi ◽  
Wolfram Schnabel
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Benzene Solution ◽  
Laser Flash ◽  
Vinyl Ketone ◽  
Phenyl Vinyl

The triplet lifetime of poly(phenyl vinyl ketone). A laser flash photolysis study

Polymer ◽  
1982 ◽  
Vol 23 (6) ◽  
pp. 913-915 ◽  
Author(s):  
J.C Scaiano ◽  
L.C Stewart
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Vinyl Ketone ◽  
Triplet Lifetime ◽  
Phenyl Vinyl

2. Laser Flash Photolysis Studies on Homo- and Copolymers of Phenyl Vinyl Ketone in Solution

1976 ◽  
Vol 9 (3) ◽  
pp. 468-470 ◽  
Author(s):  
J. Kiwi ◽  
W. Schnabel
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Vinyl Ketone ◽  
Phenyl Vinyl

Laser Flash Photolysis Studies on Homo- and Copolymers of Phenyl Vinyl Ketone in Solution

1975 ◽  
Vol 8 (4) ◽  
pp. 430-435 ◽  
Author(s):  
J. Kiwi ◽  
W. Schnabel
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Vinyl Ketone ◽  
Phenyl Vinyl

Article

1999 ◽  
Vol 77 (5-6) ◽  
pp. 1066-1076
Author(s):  
Hideo Tomioka ◽  
Junichi Nakajima ◽  
Hidehiko Mizuno ◽  
Eiji Iiba ◽  
Katsuyuki Hirai
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Room Temperature ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Benzene Solution ◽  
Laser Flash ◽  
Spin Resonance ◽  
Structure Reactivity Relationship ◽  
Resonance Laser

A series of triplet 9-triptycyl(aryl)carbenes, where aryl groups are phenyl, 1- and 2-naphthyl, and 9-anthryl, is generated by photolysis of the corresponding diazomethanes and observed directly by spectroscopic means. Their structures are characterized by electron spin resonance (ESR) spectroscopy in a 2-methyltetrahydrofuran matrix at 77 K, and the reactivities are investigated by laser flash photolysis in degassed benzene solution at room temperature. Comparison of the data with other arylcarbenes bearing a series of substituents, i.e., hydrogen, phenyl, naphthyl, and anthryl groups, revealed an interesting relationship between structures and reactivities of triplet arylcarbenes.Key words: steric protection, stability of triplet carbenes, electron spin resonance, laser flash photolysis, structure-reactivity relationship.

Triplet energies of fumaronitrile and maleonitrile

1982 ◽  
Vol 60 (3) ◽  
pp. 339-341 ◽  
Author(s):  
Po Cheong Wong
Keyword(s):  
Charge Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Benzene Solution ◽  
Laser Flash ◽  
Transfer Mechanism ◽  
Triplet Energy ◽  
Charge Transfer Mechanism ◽  
A Charge

The triplet energies of fumaronitrile and maleonitrile measured by laser flash photolysis technique using the Herkstroeter–Hammond method are both 59 ± 2 kcal mol−1. Our results show that these olefins are classical triplet energy acceptors for non-electron donating sensitizers. With electron donating sensitizers, quenching through a charge-transfer mechanism also occurs in benzene solution.

Photochemistry of α-chloro- and α-bromoacetophenone. Determination of extinction coefficients for halogen–benzene complexes

1988 ◽  
Vol 66 (6) ◽  
pp. 1474-1478 ◽  
Author(s):  
W. G. McGimpsey ◽  
J. C. Scaiano
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Benzene Solution ◽  
Halogen Bond ◽  
Bond Cleavage ◽  
Laser Flash ◽  
Quantum Yields ◽  
Extinction Coefficients ◽  
Transient Data

The photochemical dehalogenation of α-haloacetophenones (Cl, Br) in benzene solution has been examined under conditions of continuous and pulsed laser irradiation. Product and quantum yield studies indicate that carbon-halogen bond cleavage occurs with quantum yields of 0.88 and 0.41 for α-chloro- and α-bromoacetophenone, respectively. These values are based on trapping studies in which the PhC(O)ĊH2 radicals produced photochemically are scavenged by hydrogen donors such as benzenethiol. Laser flash photolysis studies lead to intense transient signals due to benzene–halogen complexes. Combination of transient data and quantum yields lead to extinction coefficients of 1 800 and 23 700 M−1 cm−1 for the chlorine (490 nm) and bromine (550 nm) complexes, respectively.

Laser flash photolysis study of the photochemistry of ninhydrin and its 5-methoxy derivative in benzene solution

2004 ◽  
Vol 168 (3) ◽  
pp. 211-216 ◽  
Author(s):  
Frances R. dos Santos ◽  
Monica T. da Silva ◽  
José Carlos Netto-Ferreira
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Benzene Solution ◽  
Laser Flash ◽  
Methoxy Derivative

Primary Photochemical Processes of the Phototoxic Neuroleptic Cyamemazine: A Study by Laser Flash Photolysis and Steady State Irradiation

2004 ◽  
Author(s):  
Patrice Morlière ◽  
Francisco Bosca ◽  
Miguel Miranda ◽  
José Castell ◽  
René Santus
Keyword(s):  
Steady State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Processes
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