The Efficiency of Energy Transfer from Quantum Dots to Photosynthetic Reaction Centers of Rhodobacter sphaeroides in the Temperature Range of 100–310 K
| Autor: | Pavel M. Krasilnikov, Evgeny P. Lukashev, Andrei B. Rubin, Peter P. Knox, N. Kh. Seyfullina |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Photosynthetic reaction centre Materials science 030102 biochemistry & molecular biology biology Diffusion Biophysics Quantum yield Polymer Atmospheric temperature range biology.organism_classification Purple bacteria 03 medical and health sciences Rhodobacter sphaeroides chemistry Chemical physics Quantum dot |
| Zdroj: | Biophysics. 63:895-905 |
| ISSN: | 1555-6654 0006-3509 |
| Popis: | The temperature dependence of the efficiency of energy transfer from polymer coated CdSe/CdS/ZnS quantum dots bearing terminal carboxyl groups to the reaction centers of purple bacteria Rb. sphaeroides was investigated experimentally. It was established that this efficiency remained almost constant with the change of temperature from 100 to approximately 230 K, but decreased 2–3 times when temperature rose to 310 K. A possible mechanism of such a temperature dependence based on the views on the activation caused by the intensification of the molecular motion is proposed. In the framework of these views, the analysis of the temperature dependence of the parameters that influence the efficiency of energy transfer, according to Forster's theory, was performed. It was shown that the main contribution to the observed experimental dependence was made by the change in the fluorescence quantum yield of quantum dots, and an additional contribution could be made by diffusion processes and effects of structural changes. |
| Databáze: | OpenAIRE |
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