ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The kinetics of triplet-triplet energy transfer is studied in fluid solution with polyacrylophenone, (poly(1-benzoylethylene)), (PAP) as the energy donor and 1-methylnaphthalene (MeN) as quencher. The rate constant of quenching Kq is obtained from the Stern-Volmer constant Kqτ for the inhibition of main chain scission in PAP, the lifetime τ of the excited state being measured by picosecond laser photolysis. Kq does not verify the scheme of a diffusion controlled reaction generally applied for small molecule as valerophenone. We proposed a kinetic scheme based on the Voltz theory of energy migration where a migration term Ω of the excitation energy in PAP adds to the material diffusion of MeN. The good agreement obtained for the value of Ω determined by extrapolation at infinite viscosity of solvent, where the material diffusion is negligible, supports our hypothesis of energy migration in PAP at room temperature.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1977.021780815
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