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用非绝热动力学模拟方法估算生物发光效率
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摘要
比起一般的化学发光,生物发光的发光效率要高得多。生物发光效率定义为一个反应物产生光子的量子产率,可简单理解为反应产生化学激发态的效率(Φ~(CS))与该化学激发态的荧光效率的乘积。荧光效率通常容易被实验测得。Φ~(CS)决定于非绝热跃迁中基态和激发态产物的分支比。我们在轨线面跳跃方法的理论框架下用非绝热动力学模拟的方法估算了萤火虫和萤火鱿的生物发光效率,计算结果与实验值符合。
Compared with the general chemiluminescence, the bioluminescence is of much higher luminescent efficiency. The bioluminescent efficiency(Φ~(BL)) is defined as the quantum yield of the production of a photon from a single reactant. It can be described as the product of the quantum yields of two independent processes,(i) the formation of electronic excited-state products, i.e., the yield of the chemi-excited state product(Φ~(CS)), and(ii) the radiative decay of the excited product, i.e., the fluorescent yield(Φ~(FL)), which is usually obtained by experiments. Φ~(CS) is the branch ratio of the S_(0~-) and S_1-state products after the nonadiabatic transitions. We performed a nonadiabatic molecular dynamics simulation under the framework of the trajectory surface hopping method and theoretically estimated the bioluminescent quantum yield of firefly and squid, and the theoretical prediction are in good agreement with experimental measurements..
引文
[1]Yue,L.;Lan,Z.;Liu,Y.J.Phys.Chem.Lett.2015,6:540.
    [2]Ding,B.;Naumov,P.;Liu,Y.J.Chem.Theory Comput.2015,591:11.

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