jp8b06052_si_001.doc (4.73 MB)
Ultrafast Energy Transfer Followed by Electron Transfer in a Polymeric Nanoantenna-Based Light Harvesting System
journal contribution
posted on 2018-08-09, 00:00 authored by Bikash Jana, Amitava PatraA polymeric nanoantenna-based
light harvesting system is prospective
because of it captures more number of photons by a multichromophoric
donor and subsequently transfers its energy to the acceptor. Here,
we have designed an aqueous solution-based polymeric nanoantenna,
where conjugated polymer nanoparticles (donor) are attached with Au
nanoparticle-capped porphyrin (acceptor)-encapsulated bovine serum
albumin protein for both energy transfer and electron transfer processes.
Ultrafast fluorescence upconversion and transient absorption spectroscopic
studies reveal that the ultrafast energy transfer occurs from the
conjugated polymer nanoparticle to porphyrin in 130 fs, followed by
the electron transfer from porphyrin to Au nanoparticles in 70 ps
after photoexcitation. Furthermore, the antenna effect of this light
harvesting system is found to be 79 at the donor to acceptor ratio
of 16:1. Analysis reveals that this polymeric nanoantenna opens up
a new avenue for designing a highly efficient aqueous solution-based
light harvesting system.
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absorption spectroscopic studiesnanoparticle-capped porphyrinUltrafast fluorescence upconversionlight harvesting systemacceptor ratio70 psserum albumin proteinultrafast energy transferantenna effectelectron transferelectron transfer processesUltrafast Energy Transfer Followednanoantenna-based light harvesting systemElectron Transferpolymer nanoparticlespolymer nanoparticlemultichromophoric donorsolution-based light harvesting systemPolymeric Nanoantenna-Based Light Harvesting Systemenergy transfer130 fs
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