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The mechanism of singlet‐singlet energy transfer to chlorophyll from carotenoid auxiliary pigments in photosynthetic apparatus is considered. Transmittance studies and resonance‐enhanced Raman spectroscopy on a picosecond time scale lead to the conclusion that the de–excitation lifetime of the β‐carotene singlet state is not greater than one picosecond. This would require close contiguity on the part of the transferring partners.
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Dallinger et al. (1981) studied this question.
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