Drought-Induced Ultra-Fast Fluorescence Quenching in Photosystem II in Lichens Revealed by Picosecond Time-Resolved Fluorescence Spectrophotometry

2008 ◽  
pp. 1023-1026 ◽  
Author(s):  
Masayuki Komura ◽  
Ikuko Iwasaki ◽  
Shigeru Itoh
Keyword(s):  
Photosystem Ii ◽  
Fluorescence Quenching ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Fluorescence Spectrophotometry

Size, Hydration, and Shape of SDS/Heptane Micelles Investigated by Time-Resolved Fluorescence Quenching and Electron Spin Resonance

Langmuir ◽  
2001 ◽  
Vol 17 (22) ◽  
pp. 6765-6770 ◽  
Author(s):  
Radha Ranganathan ◽  
Miroslav Peric ◽  
Rosa Medina ◽  
Ulises Garcia ◽  
Barney L. Bales ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Fluorescence Quenching ◽  
Electron Spin ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Spin Resonance

Aggregation Numbers of Cationic Oligomeric Surfactants:  A Time-Resolved Fluorescence Quenching Study

Langmuir ◽  
2006 ◽  
Vol 22 (6) ◽  
pp. 2551-2557 ◽  
Author(s):  
Laurent Wattebled ◽  
André Laschewsky ◽  
Alain Moussa ◽  
Jean-Louis Habib-Jiwan
Keyword(s):  
Fluorescence Quenching ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Aggregation Numbers

Time Resolved Fluorescence Quenching and Carrier Generation in Titanyl Phthalocyanine (TiOPc)

1997 ◽  
pp. 207-218 ◽  
Author(s):  
Zoran D. Popovic ◽  
M. Iltaf Khan ◽  
Stephen J. Atherton ◽  
Ah-Mee Hor ◽  
Joshua L. Goodman
Keyword(s):  
Fluorescence Quenching ◽  
Time Resolved Fluorescence ◽  
Carrier Generation ◽  
Time Resolved ◽  
Titanyl Phthalocyanine

Fluorescence property of photosystem II protein complexes bound to a gold nanoparticle

2017 ◽  
Vol 198 ◽  
pp. 121-134 ◽  
Author(s):  
Kazuki Tahara ◽  
Ahmed Mohamed ◽  
Kousuke Kawahara ◽  
Ryo Nagao ◽  
Yuki Kato ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Gold Nanoparticle ◽  
Water Oxidation ◽  
Artificial Photosynthesis ◽  
Fluorescence Property ◽  
Light Illumination ◽  
Time Resolved Fluorescence ◽  
Strong Light ◽  
Time Resolved ◽  
Fluorescence Measurements

Development of an efficient photo-anode system for water oxidation is key to the success of artificial photosynthesis. We previously assembled photosystem II (PSII) proteins, which are an efficient natural photocatalyst for water oxidation, on a gold nanoparticle (GNP) to prepare a PSII–GNP conjugate as an anode system in a light-driven water-splitting nano-device (Noji et al., J. Phys. Chem. Lett., 2011, 2, 2448–2452). In the current study, we characterized the fluorescence property of the PSII–GNP conjugate by static and time-resolved fluorescence measurements, and compared with that of free PSII proteins. It was shown that in a static fluorescence spectrum measured at 77 K, the amplitude of a major peak at 683 nm was significantly reduced and a red shoulder at 693 nm disappeared in PSII–GNP. Time-resolved fluorescence measurements showed that picosecond components at 683 nm decayed faster by factors of 1.4–2.1 in PSII–GNP than in free PSII, explaining the observed quenching of the major fluorescence peak. In addition, a nanosecond-decay component arising from a ‘red chlorophyll’ at 693 nm was lost in time-resolved fluorescence of PSII–GNP, probably due to a structural perturbation of this chlorophyll by interaction with GNP. Consistently with these fluorescence properties, degradation of PSII during strong-light illumination was two times slower in PSII–GNP than in free PSII. The enhanced durability of PSII is an advantageous property of the PSII–GNP conjugate in the development of an artificial photosynthesis device.

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