کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5375679 | 1504301 | 2009 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modelling excitonic energy transfer in the photosynthetic unit of purple bacteria
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modelling excitonic energy transfer in the photosynthetic unit of purple bacteria Modelling excitonic energy transfer in the photosynthetic unit of purple bacteria](/preview/png/5375679.png)
چکیده انگلیسی
Molecular mechanics and quantum chemical configuration interaction calculations in combination with exciton theory were used to predict vibronic energies and eigenstates of light harvesting antennae and the reaction centre and to evaluate excitation energy transfer rates in the photosynthetic unit of purple bacteria. Excitation energy transfer rates were calculated by using the transition matrix formalism and exciton basis sets of the interacting antenna systems. Energy transfer rates of 600-800Â fs from B800 ring to B850 ring in the LH2 antenna, 3-10Â ps from LH2 to LH2 antenna, 2-8Â ps from LH2 to LH1 antenna and finally 30-70Â ps from LH1 to the reaction centre were obtained. Dependencies of energy transfer rates on lateral and vertical inter-complex distances were determined. The results indicate that a fair amount of spatial heterogeneity of antenna complexes in the photosynthetic membrane is tolerated without much loss in excitation energy transfer efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 357, Issues 1â3, 23 February 2009, Pages 171-180
Journal: Chemical Physics - Volume 357, Issues 1â3, 23 February 2009, Pages 171-180
نویسندگان
J.M. Linnanto, J.E.I. Korppi-Tommola,