scholarly journals Complete mapping of energy transfer pathways in the plant light-harvesting complex Lhca4

2020 ◽  
Vol 22 (44) ◽  
pp. 25720-25729
Author(s):  
Martijn Tros ◽  
Vladimir I. Novoderezhkin ◽  
Roberta Croce ◽  
Rienk van Grondelle ◽  
Elisabet Romero
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Light Harvesting ◽  
Electronic Spectroscopy ◽  
Low Energy ◽  
Charge Transfer State ◽  
Two Dimensional ◽  
Light Harvesting Complex ◽  
Complete Mapping ◽  
Transfer State

New insights on Lhca4 from two-dimensional electronic spectroscopy and modelling: population of the charge-transfer state and newly identified low-energy trap.

scholarly journals The Origin of the Low-Energy Form of Photosystem I Light-Harvesting Complex Lhca4: Mixing of the Lowest Exciton with a Charge-Transfer State

2009 ◽  
Vol 96 (5) ◽  
pp. L35-L37 ◽  
Author(s):  
Elisabet Romero ◽  
Milena Mozzo ◽  
Ivo H.M. van Stokkum ◽  
Jan P. Dekker ◽  
Rienk van Grondelle ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photosystem I ◽  
Light Harvesting ◽  
Low Energy ◽  
Charge Transfer State ◽  
Light Harvesting Complex ◽  
A Charge ◽  
Transfer State

scholarly journals Excitation energy transfer and equilibration process in LHCII studied by multidimensional electronic spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 09038
Author(s):  
Thanh Nhut Do ◽  
Adriana Huerta-Viga ◽  
Cheng Zhang ◽  
Parveen Akhtar ◽  
Pawei J. Nowakowski ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Electronic Spectroscopy ◽  
Excitation Energy Transfer ◽  
Phenomenological Analysis ◽  
Two Dimensional ◽  
Light Harvesting Complex ◽  
Light Harvesting Complex Ii ◽  
Equilibration Process ◽  
Light Harvesting Antenna

Light-harvesting complex II (LHCII) – the light-harvesting antenna of Photosystem II – is a naturally abundant system that plays an important role in photosynthesis. In this study, we present a phenomenological analysis of the excitonic energy transfer in LHCII using ultrafast two-dimensional electronic spectroscopy, that we find compares well with previous theoretical and experimental results.

scholarly journals Mixing of exciton and charge-transfer states in light-harvesting complex Lhca4

2016 ◽  
Vol 18 (28) ◽  
pp. 19368-19377 ◽  
Author(s):  
Vladimir I. Novoderezhkin ◽  
Roberta Croce ◽  
Md. Wahadoszamen ◽  
Iryna Polukhina ◽  
Elisabet Romero ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Light Harvesting ◽  
Charge Transfer State ◽  
Wild Type ◽  
Exciton Model ◽  
Light Harvesting Complex ◽  
A Charge ◽  
Transfer State

Structure-based modeling of spectra of the wild-type Lhca4 and NH mutant enables us to build the exciton model of the complex that includes a charge-transfer state mixed with the excited-state manifold.

scholarly journals Exciton–Phonon Interactions Govern Charge-Transfer-State Dynamics in CdSe/CdTe Two-Dimensional Colloidal Heterostructures

2018 ◽  
Vol 140 (43) ◽  
pp. 14097-14111 ◽  
Author(s):  
Raj Pandya ◽  
Richard Y. S. Chen ◽  
Alexandre Cheminal ◽  
Marion Dufour ◽  
Johannes M. Richter ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transfer State ◽  
Two Dimensional ◽  
Transfer State

scholarly journals Evidence for coherent mixing of excited and charge-transfer states in the major plant light-harvesting antenna, LHCII

2017 ◽  
Vol 19 (34) ◽  
pp. 22877-22886 ◽  
Author(s):  
Charusheela Ramanan ◽  
Marco Ferretti ◽  
Henny van Roon ◽  
Vladimir I. Novoderezhkin ◽  
Rienk van Grondelle
Keyword(s):  
Fourier Transform ◽  
Charge Transfer ◽  
Light Harvesting ◽  
Electronic Spectroscopy ◽  
Low Energy ◽  
Light Harvesting Antenna

2D electronic spectroscopy and Fourier transform maps suggest coherently coupled states at the low-energy edge of the LHCII excitonic manifold.

scholarly journals Observation of dissipative chlorophyll-to-carotenoid energy transfer in light-harvesting complex II in membrane nanodiscs

2019 ◽  
Author(s):  
Minjung Son ◽  
Alberta Pinnola ◽  
Samuel C. Gordon ◽  
Roberto Bassi ◽  
Gabriela S. Schlau-Cohen
Keyword(s):  
Energy Transfer ◽  
Conformational Changes ◽  
Light Harvesting ◽  
Electronic Spectroscopy ◽  
Local Environment ◽  
Light Harvesting Complex ◽  
Complex Ii ◽  
Light Harvesting Complex Ii ◽  
Photosynthetic Antenna

<pre><p><a></a>Green plants prevent photodamage under high light conditions by dissipating excess energy as heat. Conformational changes of the photosynthetic antenna complexes activate dissipation by leveraging the sensitivity of the photophysics of the chlorophyll and carotenoids to their surrounding protein. However, the mechanisms and site of dissipation are still debated, largely due to two challenges. First, because of the ultrafast timescales and large energy gaps involved, measurements lacked the temporal or spectral requirements. Second, experiments have been performed in detergent, which can induce non-native conformations, or <i>in vivo</i>, where contributions from the multiple complexes cannot be disentangled and are further obfuscated by laser-induced artifacts. Here, we overcome both challenges by applying ultrabroadband two-dimensional electronic spectroscopy to the principal antenna complex, light-harvesting complex II, in a near-native membrane. The membrane enhances two dissipative pathways, one of which was previously uncharacterized chlorophyll-to-carotenoid energy transfer. Our results highlight the sensitivity of the photophysics to the local environment, which may be used to control the balance between light harvesting and dissipation <i>in vivo</i>.</p></pre>

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