Understanding Carotenoid Dynamics via the Vibronic Energy Relaxation Approach.
Understanding Carotenoid Dynamics via the Vibronic Energy Relaxation Approach.
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DOI：
10.1021/acs.jpcb.2c00996
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发表时间：
2022-06-09
影响因子：
3.3
通讯作者：
Hauer, Juergen
中科院分区：
文献类型：
--
作者：
Sebelik, Vaclav;Duffy, Christopher D. P.;Keil, Erika;Polivka, Tomas;Hauer, Juergen
类胡萝卜素是天然光合作用复合体的组成部分，任务范围从光收集到光保护。它们由光学暗激发态和亮激发态组成的潜在能量去激活网络是极其有效的：在以高达2.5 eV的光子能量激发光后，系统在几皮秒的时间尺度上弛豫回到基态。本文总结了基于振动能量弛豫方法(VERA)的模型如何解释单光子激发后弛豫动力学的主要特征，并特别强调了所谓的S*态。双光子激发后的线形超出了目前的VERA模型。我们在文章中概述了这一未来的研究方向。在实验方法的发展方面，我们讨论了需要哪些技术来更好地描述类胡萝卜素和第一溶剂化壳层内的能量耗散效应。
Carotenoids are an integral part of natural photosynthetic complexes, with tasks ranging from light harvesting to photoprotection. Their underlying energy deactivation network of optically dark and bright excited states is extremely efficient: after excitation of light with up to 2.5 eV of photon energy, the system relaxes back to ground state on a time scale of a few picoseconds. In this article, we summarize how a model based on the vibrational energy relaxation approach (VERA) explains the main characteristics of relaxation dynamics after one-photon excitation with special emphasis on the so-called S* state. Lineshapes after two-photon excitation are beyond the current model of VERA. We outline this future line of research in our article. In terms of experimental method development, we discuss which techniques are needed to better describe energy dissipation effects in carotenoids and within the first solvation shell.
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