scholarly journals Triplet–triplet energy transfer in Peridinin-Chlorophyll a-protein reconstituted with Chl a and Chl d as revealed by optically detected magnetic resonance and pulse EPR: Comparison with the native PCP complex from Amphidinium carterae

2009 ◽  
Vol 1787 (3) ◽  
pp. 168-175 ◽  
Author(s):  
Marilena Di Valentin ◽  
Giancarlo Agostini ◽  
Enrico Salvadori ◽  
Stefano Ceola ◽  
Giorgio Mario Giacometti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Magnetic Resonance ◽  
Chlorophyll A ◽  
Triplet Energy ◽  
Amphidinium Carterae ◽  
Chl A ◽  
Optically Detected Magnetic Resonance ◽  
Pulse Epr ◽  
Optically Detected ◽  
Triplet Energy Transfer

ENERGY TRANSFER IN THE PERIDININ CHLOROPHYLL a PROTEIN OF AMPHIDINIUM CARTERAE STUDIED BY POLARIZED ABSORPTION MEASUREMENTS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3849-3852 ◽  
Author(s):  
STEFANIA. S. LAMPOURA ◽  
B. P. KRUEGER ◽  
I. H. M. VAN STOKKUM ◽  
J. M. SALVERDA ◽  
C. C. GRADINARU ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Chlorophyll A ◽  
Internal Conversion ◽  
Transient Absorption ◽  
Global Analysis ◽  
Transition Dipole Moment ◽  
Transition Dipole ◽  
Amphidinium Carterae ◽  
Light Harvesting Complex ◽  
Chl A

In this work we report the results of ultrafast transient absorption studies which examined energy transfer between carotenoids and chlorophylls in Peridinin-Chlorophyll-a-Protein (PCP) light harvesting complex from the dinoflagellate Amphidinium carterae. Global analysis of the isotropic decay reveals that the peridinin lifetime in PCP is 2.3±0.2 ps. This time constant is the peridinin- Chl a energy transfer, which is essentially entirely mediated by coupling of the peridinin S 1 and Chl a Q y transitions. Based on this lifetime we estimated an energy transfer timescale of ~2.4 ps and a peridinin- Chl a coupling of 46 cm -1. The magnitude of this coupling suggests a peridinin S 1 transition dipole moment of ~3 D . Global analysis of the depolarization measurements, shows, a small decrease in the depolarization from the initial 0.4 value to 0.36±0.03. This decrease occurs on the same timescale as the S2→S1 internal conversion, suggesting that either the S 1 transition dipole is oriented ~15° away from the S 2 transition dipole, or, that a small amount of peridinin S 2-peridinin S 2 energy transfer occurs in competition with internal conversion, or some combination of the two.

scholarly journals Triplet–triplet energy transfer from chlorophylls to carotenoids in two antenna complexes from dinoflagellate Amphidinium carterae

2016 ◽  
Vol 1857 (4) ◽  
pp. 341-349 ◽  
Author(s):  
Zuzana Kvíčalová ◽  
Jan Alster ◽  
Eckhard Hofmann ◽  
Petro Khoroshyy ◽  
Radek Litvín ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Triplet Energy ◽  
Amphidinium Carterae ◽  
Triplet Energy Transfer

scholarly journals Evidence for water-mediated triplet–triplet energy transfer in the photoprotective site of the peridinin–chlorophyll a–protein

2014 ◽  
Vol 1837 (1) ◽  
pp. 85-97 ◽  
Author(s):  
Marilena Di Valentin ◽  
Claudia E. Tait ◽  
Enrico Salvadori ◽  
Laura Orian ◽  
Antonino Polimeno ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Chlorophyll A ◽  
Triplet Energy ◽  
Triplet Energy Transfer

scholarly journals Triplet–triplet energy transfer in the major intrinsic light-harvesting complex of Amphidinium carterae as revealed by ODMR and EPR spectroscopies

2010 ◽  
Vol 1797 (10) ◽  
pp. 1759-1767 ◽  
Author(s):  
Marilena Di Valentin ◽  
Enrico Salvadori ◽  
Giancarlo Agostini ◽  
Federico Biasibetti ◽  
Stefano Ceola ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Triplet Energy ◽  
Amphidinium Carterae ◽  
Light Harvesting Complex ◽  
Triplet Energy Transfer
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