Laser flash photolysis study of the charge-transfer photochemistry of octacyanomolybdate(V) and octacyanotungstate(V) ions

1986 ◽  
pp. 1217 ◽  
Author(s):  
Kevin R. Butter ◽  
Terence J. Kemp ◽  
Barbara Sieklucka ◽  
Alina Samotus
Keyword(s):  
Charge Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash

A laser flash photolysis study of the behaviour of polyfluorophenyl ketones in solution

1989 ◽  
Vol 67 (5) ◽  
pp. 927-932 ◽  
Author(s):  
D. R. Boate ◽  
L. J. Johnston ◽  
J. C. Scaiano
Keyword(s):  
Charge Transfer ◽  
Hydrogen Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Oxidation Potential ◽  
Triplet States ◽  
Excellent Correlation ◽  
Triplet Energy ◽  
Keywords Laser

Decafluorobenzophenone triplets, which have a triplet energy very close to that of benzophenone, are much more reactive than benzophenone in quenching reactions that involve hydrogen transfer and/or charge transfer. An excellent correlation has been observed between the rate constants for charge transfer quenching and the oxidation potential of the substrate. In the case of 2-propanol, where the reactivity can be fully accounted for by hydrogen transfer, decafluorobenzophenone is 35 times more reactive than benzophenone. Pentafluorobenzophenone shows intermediate behaviour. Keywords: laser photolysis, benzophenones, triplet states, charge transfer, photoreduction.

Laser flash photolysis of metal oxide supported vanadyl catalysts. Spectroscopic evidence for the ligand-to-metal charge-transfer state

2006 ◽  
Vol 16 (2) ◽  
pp. 216-220 ◽  
Author(s):  
Hermenegildo García ◽  
Jose Manuel López-Nieto ◽  
Emilio Palomares ◽  
Heinz D. Roth ◽  
Benjamín Solsona
Keyword(s):  
Charge Transfer ◽  
Metal Oxide ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Charge Transfer State ◽  
Metal Charge ◽  
Spectroscopic Evidence ◽  
Metal Charge Transfer ◽  
Transfer State

Photochemical transformation of an iron(iii)–arsenite complex in acidic aqueous solution

2016 ◽  
Vol 15 (3) ◽  
pp. 431-439 ◽  
Author(s):  
Ivan P. Pozdnyakov ◽  
Wei Ding ◽  
Jing Xu ◽  
Long Chen ◽  
Feng Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Charge Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Transformation ◽  
Acidic Aqueous Solution ◽  
Metal Charge ◽  
Metal Charge Transfer

An Fe(iii)–As(iii) complex was characterized by UV/Vis spectra and its laser flash photolysis via ligand-to-metal charge transfer resulted in the intermediate of Fe(ii)–As(iv).

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.

scholarly journals Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study

2016 ◽  
Author(s):  
Fabian Sieland ◽  
Jenny Schneider ◽  
Thorsten Lippmann ◽  
Detlef W. Bahnemann
Keyword(s):  
Charge Transfer ◽  
Metal Oxides ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Transfer Processes

Effect of methyl substitution on the intramolecular triplet deactivation of p-methoxy-β-phenylpropiophenone

1991 ◽  
Vol 69 (12) ◽  
pp. 2053-2058 ◽  
Author(s):  
R. Boch ◽  
C. Bohne ◽  
J. C. Netto-Ferreira ◽  
J. C. Scaiano
Keyword(s):  
Charge Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Nanosecond Laser ◽  
Methyl Substitution ◽  
Intramolecular Quenching ◽  
Conformational Preferences ◽  
Key Words Laser ◽  
Nanosecond Laser Flash Photolysis

The photochemistry of several methyl-substituted p-methoxy-β-phenylpropiophenones (1–5) has been examined by nanosecond laser flash photolysis using 337-nm laser excitation. The ketone triplets decay by intramolecular β-aryl quenching of the carbonyl in a well-known process that is believed to involve charge transfer. Surprisingly, methyl substitution at the β-methylene group, which is not a participant in the deactiviation mechanism, causes a dramatic decrease in the triplet lifetime; the effect is attributed to different conformational preferences in ketones 1–3 and is rationalized on the basis of MMX calculations. Methyl substitution in the β-aryl ring affects the ease of oxidation of this ring and as a result induces changes in the kinetics for intramolecular charge transfer. This conclusion is further supported by electrochemical studies of ketones 1, 4, and 5. Key words: laser flash photolysis, triplet ketones, intramolecular quenching, charge transfer.

Laser flash photolysis study of anthracene/viologen charge transfer complex in non-polar, dealuminated zeolites

2004 ◽  
Vol 6 (6) ◽  
pp. 1345-1349 ◽  
Author(s):  
Mercedes Álvaro ◽  
Avelino Corma ◽  
Belén Ferrer ◽  
Hermenegildo García ◽  
Emilio Palomares
Keyword(s):  
Charge Transfer ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Charge Transfer Complex ◽  
Laser Flash
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