Ultrafast Energy Transfer Followed by Electron Transfer
in a Polymeric Nanoantenna-Based Light Harvesting System
Bikash Jana
Amitava Patra
10.1021/acs.jpcc.8b06052.s001
https://acs.figshare.com/articles/journal_contribution/Ultrafast_Energy_Transfer_Followed_by_Electron_Transfer_in_a_Polymeric_Nanoantenna-Based_Light_Harvesting_System/7001141
A 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.
2018-08-09 00:00:00
absorption spectroscopic studies
nanoparticle-capped porphyrin
Ultrafast fluorescence upconversion
light harvesting system
acceptor ratio
70 ps
serum albumin protein
ultrafast energy transfer
antenna effect
electron transfer
electron transfer processes
Ultrafast Energy Transfer Followed
nanoantenna-based light harvesting system
Electron Transfer
polymer nanoparticles
polymer nanoparticle
multichromophoric donor
solution-based light harvesting system
Polymeric Nanoantenna-Based Light Harvesting System
energy transfer
130 fs