Fluorescence characteristics and photophysical parameters of light-harvesting chlorophyll a/b complex aggregates

Autor:	Evgeny E. Ostroumov, M. S. Khristin, V. Z. Pashchenko, V. V. Fadeev, V. B. Tusov
Rok vydání:	2007
Předmět:	Light-harvesting complex Chlorophyll a chemistry.chemical_compound B vitamins chemistry Biophysics Analytical chemistry Laser fluorimetry Dispersion (chemistry) Photochemistry Spectroscopy Fluorescence Order of magnitude
Zdroj:	Biophysics. 52:462-467
ISSN:	1555-6654 0006-3509
Popis:	Fluorescence characteristics and molecular photophysical parameters of light-harvesting chlorophyll a/b complexes isolated from pea were studied in relation to their aggregation state. The aggregate size was varied by changing the Triton X-100 concentration from 0 to 0.23 mM at a chlorophyll concentration of 2.45 μg/ml. Molecular photophysical parameters were determined with laser fluorimetry. Dispersion of large aggregates into smaller ones drastically decreased the intensity of low-temperature (77 K) fluorescence at 700 nm, reduced the singlet-singlet annihilation rate by more than two orders of magnitude, and prolonged the fluorescence lifetime from 0.16 to 3.2 ns.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::226e1ffe96eab788082a319871cf2a65 https://doi.org/10.1134/s0006350907050028 Zobrazit plný text záznamu Full text from SpringerLink