Studies of the antenna effect in polymer systems. 18. Photochemical reactions of styrene solubilized in an aqueous solution of poly(sodium styrenesulfonate-co-2-vinylnaphthalene)

1991 ◽  
Vol 24 (2) ◽  
pp. 474-478 ◽  
Author(s):  
Maria Nowakowska ◽  
James E. Guillet
Keyword(s):  
Aqueous Solution ◽  
Photochemical Reactions ◽  
Antenna Effect ◽  
Polymer Systems ◽  
Sodium Styrenesulfonate

Photochemical reactions of antioxidant sesamol in aqueous solution

2000 ◽  
Vol 77 (11) ◽  
pp. 1205 ◽  
Author(s):  
Kouichi Nakagawa
Keyword(s):  
Aqueous Solution ◽  
Photochemical Reactions

Kinetics of the photochemical reactions of the croconate dianion in aqueous solution

1992 ◽  
Vol 70 (1) ◽  
pp. 135-143 ◽  
Author(s):  
B Zhao ◽  
M. H. Back
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Quantum Yield ◽  
Rate Constants ◽  
Photochemical Reactions ◽  
Electron Acceptors ◽  
Basic Solution ◽  
Hydroxyl Ion ◽  
Kinetics Of

The kinetics of the photochemical reactions of the dianion of croconic acid (1,2-dihydroxycyclopentenetrione) have been studied in aqueous solution in the presence of electron acceptors. In neutral solutions the quantum yield for disappearance of croconate dianion was small (< 10−3) but was substantially increased in basic solution and in the presence of electron acceptors. At pH 12 in the presence of 4-nitrobenzylbromide and biacetyl a quantum yield of 1 was obtained. The kinetics of the rate of disappearance of croconate dianion as a function of pH and concentration of acceptor showed that the excited dianion is oxidized by acceptors and reacts with hydroxyl ion. A mechanism is proposed that, by assuming reasonable values for the rate constants involved, is shown to be consistent with the results. Keywords: photolysis, kinetics, croconate dianion, electron transfer.

Sign in / Sign up

Export Citation Format

Share Document