Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 40, Pages 17342-17353Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp52941j
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Funding
- Natural Science Foundation of China [21073112, 21173136, 91233108, 21173063]
- National Basic Research Program of China (973 Program) [2012CB93280]
- Natural Science foundation of Shandong Province [ZR2010EZ007]
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A series of novel light-harvesting compounds (namely PO-PN, PO-PO-PN and PO-PO-PO-PN) were synthesized with a linear-shaped phenoxy group-substituted perylenetetracarboxylic diimide (PO) oligomer as donor and a pyrrolidinyl group-substituted perylenetetracarboxylic diimide (PN) as acceptor. The photophysical properties of these linear-shaped compounds are investigated by steady state electronic absorption, fluorescence spectra and lifetime measurements. The ground state interactions between the neighbor PO subunits within these three compounds are weak. No matter which PO subunit is excited in these linear molecules, the excitation energy is finally collected by the PN subunit. The excitation energy can transfer as long as 47 angstrom without any decrease in efficiency. The energy transfer rate constants determined by femtosecond transient absorption experiments are fast and close to that of the energy transfer from B800 to B850 in LH II of natural photosynthesis.
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