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Geminate recombination proton-transfer reactions

✍ Scribed by E. Pines; D. Huppert

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 334 KB
Volume: 126
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)85121-1

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✦ Synopsis

The fluorescence decay of 8-hydroxy pyrene 1,3,6-trisulphonate (HPTS) was found to be non-exponential. A kinetic model which attributes this behaviour to a reversible time-dependent geminate recombination is presented. Although only slightly affecting the dissociation profile, geminate recombination has a considerable effect on the dissociation rate.

We report the first direct detection of geminate recombination kinetics in excited-state proton transfer reactions. Fig. shows the decay curve of the excited state of 8-hydroxy pyrene 1,3,6-trisulphonate trisodium salt (HPTS) which dissociates according to the scheme t11 R"OH ki B R'O-+H+ ke k f 1 1 k;

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