Pudlák Michal, Pinčák Richard
Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic.
J Phys Chem A. 2023 Jul 20;127(28):5795-5804. doi: 10.1021/acs.jpca.3c01884. Epub 2023 Jul 10.
The exciton transfer in the light-harvesting complex with the following electron-hole separation in the photosynthetic reaction center dimer is investigated theoretically. The asymmetry in the ring structure of the LH1 antenna complex is assumed. The impact of this asymmetry on exciton transfer is studied. The quantum yields of the electron-hole separation and exciton deactivation into the ground state have been computed. It was shown that the asymmetry does not affect these quantum yields if the coupling between the antenna ring molecules is strong enough. Exciton kinetics are different when asymmetry is present, but the electron-hole separation efficiency is similar to that in the symmetric case. It also showed that the dimer structure in the reaction center is advantageous to the monomeric reaction center structure.
从理论上研究了光合反应中心二聚体中光捕获复合物中的激子转移以及随后的电子 - 空穴分离。假定LH1天线复合物的环结构存在不对称性。研究了这种不对称性对激子转移的影响。计算了电子 - 空穴分离的量子产率以及激子失活回到基态的量子产率。结果表明，如果天线环分子之间的耦合足够强，不对称性不会影响这些量子产率。当存在不对称性时，激子动力学有所不同，但电子 - 空穴分离效率与对称情况下相似。研究还表明，反应中心中的二聚体结构比单体反应中心结构更具优势。
