Equilibration of excitation energy in light-harvesting complex of photosystem 2 analysed by pump-probe experiments

Title:

Equilibration of excitation energy in light-harvesting complex of photosystem 2 analysed by pump-probe experiments

Creator:

Schrötter, T., Voigt, J., and Kehrberg, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b86b7791-6747-49a6-9cee-9aac130db1d3
uuid:b86b7791-6747-49a6-9cee-9aac130db1d3
urnnbn:urn:nbn:cz:aba007-000fma

Type:

model:internalpart and TEXT

Format:

print

Description:

The exciton equilibration in the light-harvesting complex of photosystem 2 at room temperature was studied with pump-probe experiments under quasi-stationary conditions. The measurements were performed with two dye lasers, which had a pulse diuation of 10 ns and a spectral bandwidth of less than 0.01 nm. The relative probe beam transmission ffom 640-690 nm was recorded at different excitation wavelengths, varied from 645 to 685 nm. Two maxima were observed at 650 nm (Chl b absorption region) and at 680 nm (Chl a absorption region). The relative probe beam transmission in the Chl a region showed a course nearly independent of the pump beam wavelengťh in contrast to a weak dependence in the Chl b region. Measurements of the relative probe beam transmission as a function of pump beam intensity revealed a dominating exciton-exciton annihilation in the Chl a absorption region. In the Chl b region exciton-exciton annihilation was only marginal.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

603-612 and 125-134

Source:

Photosynthetica | 1994 Volume:30 | Number:4

Harvested from:

CDK

Metadata only:

false