Open AccessEnhancement of Energy Transfer Efficiency with Structural Control of Multichromophore Light‐Harvesting Assembly
Author(s) -
Oh Inhwan,
Lee Hosoowi,
Kim Tae Wu,
Kim Chang Woo,
Jun Sunhong,
Kim Changwon,
Choi Eun Hyuk,
Rhee Young Min,
Kim Jeongho,
Jang WooDong,
Ihee Hyotcherl
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202001623
Subject(s) - förster resonance energy transfer , energy transfer , dendrimer , chemistry , spectroscopy , absorption (acoustics) , nanotechnology , chemical physics , materials science , biophysics , fluorescence , optics , physics , biology , biochemistry , quantum mechanics , composite material
Multichromophore systems (MCSs) are envisioned as building blocks of molecular optoelectronic devices. While it is important to understand the characteristics of energy transfer in MCSs, the effect of multiple donors on energy transfer has not been understood completely, mainly due to the lack of a platform to investigate such an effect systematically. Here, a systematic study on how the number of donors ( n D ) and interchromophore distances affect the efficiency of energy transfer ( η FRET ) is presented. Specifically, η FRET is calculated for a series of model MCSs using simulations, a series of multiporphyrin dendrimers with systematic variation of n D and interdonor distances is synthesized, and η FRET s of those dendrimers using transient absorption spectroscopy are measured. The simulations predict η FRET in the multiporphyrin dendrimers well. In particular, it is found that η FRET is enhanced by donor‐to‐donor energy transfer only when structural heterogeneity exists in an MCS, and the relationships between the η FRET enhancement and the structural parameters of the MCS are revealed.