Krasilnikov P M, Lukashev E P, Knox P P, Seyfullina N Kh, Rubin A B
Biological Faculty, Moscow State University, 119234, Moscow, Russia.
Dokl Biochem Biophys. 2019 May;484(1):21-24. doi: 10.1134/S160767291901006X. Epub 2019 Apr 22.
The temperature dependence of the efficiency of energy migration from the CdSe/CdS/ZnS quantum dots (QDs) with a fluorescence maximum at 580 nm to the reaction centers (RCs) of the bacteria Rb. sphaeroides is practically constant over the temperature range from 100 to ~230-240 K but then decreases 2.5-3 times as temperature further increases to 310 K. The analysis on this dependence on the basis of Förster's theory showed that the major changes in the energy transfer efficiency are associated with the temperature change in the quantum yield of QD fluorescence, which is due to the activation of intramolecular mobility in the RC structure.
从荧光最大值在580 nm的CdSe/CdS/ZnS量子点（QDs）到球形红细菌（Rb. sphaeroides）反应中心（RCs）的能量迁移效率对温度的依赖性，在100至约230 - 240 K的温度范围内实际上是恒定的，但当温度进一步升高至310 K时，效率降低2.5 - 3倍。基于Förster理论对这种依赖性的分析表明，能量转移效率的主要变化与量子点荧光量子产率的温度变化有关，这是由于RC结构中分子内流动性的激活所致。
