Short-Range Coherence in the Energy Transfer of Photosynthetic Light-Harvesting Systems

1999 ◽  
Vol 103 (47) ◽  
pp. 9417-9422 ◽  
Author(s):  
Jonaki Ray ◽  
Nancy Makri
Keyword(s):  
Energy Transfer ◽  
Short Range ◽  
Light Harvesting ◽  
Harvesting Systems

Efficient artificial light-harvesting systems based on aggregation-induced emission constructed in supramolecular gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinxian Ma ◽  
bo qiao ◽  
Jinlong Yue ◽  
JingJing Yu ◽  
yutao geng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Light Harvesting ◽  
Artificial Light ◽  
Efficient Energy Transfer ◽  
Aggregation Induced Emission ◽  
Efficient Energy ◽  
Harvesting Systems ◽  
Acyl Hydrazone

Based on a new designed acyl hydrazone gelator (G2), we developed an efficient energy transfer supramolecular organogel in glycol with two different hydrophobic fluorescent dyes rhodamine B (RhB) and acridine...

scholarly journals Synergy of light harvesting and energy transfer as well as short-range charge shift reactions in multicomponent conjugates

Nanoscale ◽  
2018 ◽  
Vol 10 (47) ◽  
pp. 22400-22408 ◽  
Author(s):  
Ettore Fazio ◽  
Kim A. Winterfeld ◽  
Ana López-Pérez ◽  
Tomás Torres ◽  
Dirk M. Guldi ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Reaction Center ◽  
Short Range ◽  
Light Harvesting ◽  
Photosynthetic Reaction Center ◽  
Charge Shift

The panchromatic character, and cascade-like charge transfer behaviour of this multichromophoric conjugate, prove it a unique photosynthetic reaction center mimic.

NIR emissive light-harvesting systems through passivation perovskite and sequential energy transfer for third-level fingerprint imaging

2021 ◽  
Author(s):  
Kaipeng Zhong ◽  
Siyu Lu ◽  
Wenting Guo ◽  
Junxia Su ◽  
Shihao Sun ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Coordination Polymer ◽  
Quantum Dot ◽  
Self Assembly ◽  
Light Harvesting ◽  
Harvesting Systems ◽  
Nir Emission ◽  
Fluorescence Dyes

An efficient perovskite-quantum-dot light-harvesting system with NIR emission was fabricated based on passivation CH3NH3PbBr3 QDs in the supramolecular self-assembly of Zn(II) carboxyl functionalized-pillar[5]arene coordination polymer and two different fluorescence dyes,...

Through space singlet energy transfers in light-harvesting systems and cofacial bisporphyrin dyads

2010 ◽  
Vol 14 (01) ◽  
pp. 55-63 ◽  
Author(s):  
Pierre D. Harvey ◽  
Christine Stern ◽  
Claude P. Gros ◽  
Roger Guilard
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Time Scale ◽  
Light Harvesting ◽  
Energy Migration ◽  
Triplet Energy ◽  
Energy Transfers ◽  
Harvesting Systems ◽  
Controlled Structure ◽  
And Migration

Recent discoveries from our research groups on the photophysics of a few cofacial bisporphyrin dyads for through space singlet and triplet energy transfers raised several important investigations about the mechanism of energy transfers and energy migration in light-harvesting devices, notably LH II, in the heavily investigated purple photosynthetic bacteria. The key feature is that for face-to-face and slipped dyads with controlled structure using rigid spacers or spacers with limited flexibilities, our fastest rates for singlet energy transfer are in the 10 × 109 s -1 (i.e. 100 ps time scale) for donor-acceptor distances of ~3.5–3.6 Å. The time scale for energy transfers between different bacteriochlorophylls, notably B800*→B850, is in the ps despite the long Mg ⋯ Mg separation (~18 Å). This short rate drastically contrasts with the well-accepted Förster theory. This review focuses on the photophysical processes and dynamics in LH II and compares these parameters with our investigated model dyads build upon octa-etio-porphyrin chromophores and rigid and semi-rigid spacers. The recently discovered role of the rhodopin glucoside (carotenoid) will be analyzed as possible relay for energy transfers, including the possibility of uphill processes at room temperature. In this context the concept of energy migration may be complemented by parallel relays and uphill processes. It is also becoming more obvious that the irreversible electron transfer at the reaction center (electron transfer from the special pair to the phaeophytin) renders the rates for energy transfer and migration faster precluding all possibility of back transfers.

Separating Annihilation and Excitation Energy Transfer Dynamics in Light Harvesting Systems

2013 ◽  
Vol 117 (38) ◽  
pp. 11372-11382 ◽  
Author(s):  
Mikas Vengris ◽  
Delmar S. Larsen ◽  
Leonas Valkunas ◽  
Gerdenis Kodis ◽  
Christian Herrero ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Light Harvesting ◽  
Excitation Energy Transfer ◽  
Harvesting Systems
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