Bursting photosynthesis: designing ad-hoc fluorophores to complement the light harvesting capability of the photosynthetic reaction center

2014 ◽  
Vol 1689 ◽  
Author(s):  
Roberta Ragni ◽  
Omar Hassan Omar ◽  
Rocco Roberto Tangorra ◽  
Francesco Milano ◽  
Danilo Vona ◽  
...  
Keyword(s):  
Reaction Center ◽  
Ad Hoc ◽  
Light Harvesting ◽  
Photosynthetic Reaction Center ◽  
Covalent Functionalization ◽  
Photosynthetic Proteins ◽  
Powerful Approach ◽  
New Generation ◽  
Light Harvesting Antenna ◽  
Organic Fluorophore

ABSTRACTThe covalent functionalization of photosynthetic proteins with properly tailored organic molecular antennas represents a powerful approach to build a new generation of hybrid systems capable of exploiting solar energy. In this paper the strategy for the synthesis of the tailored aryleneethynylene organic fluorophore (AE) properly designed to act as light harvesting antenna is presented along with its successful bioconjugation to the photosynthetic reaction center RC from the bacterium Rhodobacter sphaeroides .

A far-red emitting aryleneethynylene fluorophore used as light harvesting antenna in hybrid assembly with the photosynthetic reaction center

MRS Advances ◽  
2015 ◽  
Vol 1 (7) ◽  
pp. 495-500 ◽  
Author(s):  
Simona la Gatta ◽  
Omar Hassan Omar ◽  
Angela Agostiano ◽  
Francesco Milano ◽  
Rocco Roberto Tangorra ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Hybrid Systems ◽  
Reaction Center ◽  
Light Harvesting ◽  
Photosynthetic Reaction Center ◽  
Hybrid Assembly ◽  
Native Protein ◽  
Light Harvesting Antenna ◽  
Organic Fluorophore

ABSTRACTThe photosynthetic reaction center (RC) from the purple Rhodobacter (R.) sphaeroides bacterium is a protein with unique photoconversion capability that can be exploited in hybrid systems for energy conversion. We have developed a tailored aryleneethynylene organic fluorophore (AE750) acting as efficient light harvesting antenna and successfully bioconjugated it to the photosynthetic RC. We have also demonstrated that, under suitable conditions, the biohybrid AE750-RC system can outperform the energy photoconversion ability of the native protein.

Bio-hybrid photoconverter by covalent functionalization of the photosynthetic reaction center of Rhodobacter sphaeroides with fluorescein isothiocyanate

2015 ◽  
Vol 1722 ◽  
Author(s):  
Rocco Roberto Tangorra ◽  
Alessandra Antonucci ◽  
Francesco Milano ◽  
Simona la Gatta ◽  
Alessandra Operamolla ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Reaction Center ◽  
Rhodobacter Sphaeroides ◽  
Photosynthetic Reaction Center ◽  
Fluorescein Isothiocyanate ◽  
Covalent Functionalization ◽  
Photosynthetic Proteins ◽  
Natural Photosynthesis

ABSTRACTOrganic biological hybrid systems, accessible by covalent functionalization of photosynthetic proteins with molecular antennas, represent a promising novelty to enhance natural photosynthesis. In this paper, we present the successful bioconjugation of a commercial fluorophore, fluorescein isothiocyanate (FITC), to the photosynthetic reaction center RC from the bacterium Rhodobacter sphaeroides strain R26. The resulting hybrid outperforms the pristine protein in hole-electron couple generation yield, exclusively at wavelengths where the fluorophore absorbs while the protein does not.

scholarly journals A heptamethine cyanine dye suitable as antenna in biohybrids based on bacterial photosynthetic reaction center

MRS Advances ◽  
2018 ◽  
Vol 4 (20) ◽  
pp. 1143-1148 ◽  
Author(s):  
Roberta Ragni ◽  
Gabriella Leone ◽  
Simona la Gatta ◽  
Giorgio Rizzo ◽  
Marco Lo Presti ◽  
...  
Keyword(s):  
Energy Source ◽  
Reaction Center ◽  
Light Harvesting ◽  
Photosynthetic Reaction Center ◽  
Cyanine Dye ◽  
Environmental Friendly ◽  
Light Harvesting Antenna ◽  
Efficient Photoconversion ◽  
Bacterial Photosynthetic Reaction Center

ABSTRACT:Sunlight is the most environmental friendly energy source available on Earth; many efforts devoted to design artificial photoconversion systems are ongoing, nevertheless they are still expensive and poorly efficient. Photoconversion devices made with organic-biological hybrids, or biohybrids, based on the photosynthetic reaction center (RC) have been introduced. In these systems, the photoenzyme is garnished with artificial antennas to enhance the photoactivity of the RC. Here we present a newly synthesized heptamethine cyanine dye that fulfills requisites to act as efficient RC light harvesting antenna.

Enhancing the Light Harvesting Capability of a Photosynthetic Reaction Center by a Tailored Molecular Fluorophore

2012 ◽  
Vol 51 (44) ◽  
pp. 11019-11023 ◽  
Author(s):  
Francesco Milano ◽  
Rocco Roberto Tangorra ◽  
Omar Hassan Omar ◽  
Roberta Ragni ◽  
Alessandra Operamolla ◽  
...  
Keyword(s):  
Reaction Center ◽  
Light Harvesting ◽  
Photosynthetic Reaction Center

Generation of ion-radical chlorophyll states in the light-harvesting antenna and the reaction center of cyanobacterial photosystem I

2020 ◽  
Vol 146 (1-3) ◽  
pp. 55-73 ◽  
Author(s):  
Dmitry A. Cherepanov ◽  
Ivan V. Shelaev ◽  
Fedor E. Gostev ◽  
Arseniy V. Aybush ◽  
Mahir D. Mamedov ◽  
...  
Keyword(s):  
Reaction Center ◽  
Photosystem I ◽  
Light Harvesting ◽  
Light Harvesting Antenna

Molecular porphyrin­fullerene architectures

2003 ◽  
Vol 75 (8) ◽  
pp. 1069-1075 ◽  
Author(s):  
D. M. Guldi
Keyword(s):  
Reaction Center ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Light Harvesting ◽  
Reorganization Energy ◽  
Electronic Coupling ◽  
Artificial Light ◽  
Coupling Element ◽  
Light Harvesting Antenna ◽  
Energetic Charge

This article describes the utilization of porphyrin and fullerene architectures—yielding artificial light-harvesting antenna and reaction center mimics—to tune the electronic coupling element between electron donor and electron acceptor and ultimately to affect the total reorganization energy. Most importantly, the effects that these parameters have on the rate, yield, and lifetime of the energetic charge-separated states are discussed.

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