Published in
Elsevier, Chemical Physics Letters, 3-4(264), p. 279-284
DOI: 10.1016/s0009-2614(96)01334-6
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Ultrafast singlet excitation transfer from carotenoids to chlorophylls via different pathways in light-harvesting complex II of higher plants
,
René Monshouwer,
H. vanAmerongen,
R. vanGrondelle,
Ihm vanStokkum,
Ivo H. M. van Stokkum,
Rienk van Grondelle,
Herbert van Amerongen
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Abstract
Sub-picosecond excitation transfer from carotenoids to chlorophyll in light-harvesting complex II was studied at 77 K using pump-probe experiments. We did not find evidence for energy transfer from the carotenoids to chlorophyll b. However, transfer from carotenoid to chlorophyll a was found to occur with a time constant of 220±25 fs. It is observed that spectrally different chlorophyll a pools are populated upon selective excitation of different carotenoids.