Charge separation, charge recombination, long-lived charge transfer state formation and intersystem crossing in organic electron donor/acceptor dyads,Journal of Materials Chemistry C

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Charge separation, charge recombination, long-lived charge transfer state formation and intersystem crossing in organic electron donor/acceptor dyads
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-09-11 , DOI: 10.1039/c9tc04285g
Yuqi Hou _{1,

2,

3,

4,

5} , Xue Zhang _{1,

2,

3,

4,

5} , Kepeng Chen _{1,

2,

3,

4,

5} , Dongyi Liu _{1,

2,

3,

4,

5} , Zhijia Wang _{1,

2,

3,

4,

5} , Qingyun Liu _{5,

6,

7,

8} , Jianzhang Zhao _{1,

2,

3,

4,

5} , Antonio Barbon _{9,

10,

11,

12}

Affiliation

Photo-induced charge separation (CS) and charge recombination (CR) are crucial for molecular systems used in artificial photosynthesis, photovoltaics, and photocatalysis, and these processes are also important for fundamental photochemical studies. This review article focuses on the recent developments in CS/CR, long-lived charge transfer (CT) state formation, and CR-induced intersystem crossing (ISC) in organic molecular systems, ranging from discussions on the molecular structural features dictating the kinetics and thermodynamics of CS/CR and electron spin transport, as well as the spectroscopies used for the characterization of the CS/CR and the CR-induced ISC. Emphases are put on the molecular design rationales, from the point of view of organic chemists, to achieve fast and efficient CS but slow CR, as such to access the long-lived CT state. The roles of the electron spin in controlling the CS, CR and formation of the long-lived CT state are discussed with exemplars. Time-resolved electron paramagnetic resonance (TREPR) spectroscopy for characterization of the charge and electron spin transport in the CS, CR and ISC processes is introduced.

中文翻译：

有机电子给体/受体二元体中的电荷分离，电荷复合，长寿命的电荷转移状态形成和系统间交叉

光诱导的电荷分离（CS）和电荷重组（CR）对于人工光合作用，光伏和光催化中使用的分子系统至关重要，这些过程对于基础光化学研究也很重要。这篇综述文章重点讨论了有机分子系统中CS / CR，长寿命电荷转移（CT）状态形成和CR诱导的系统间交叉（ISC）的最新进展，范围涉及对决定动力学和分子动力学的分子结构特征的讨论。 CS / CR和电子自旋输运的热力学，以及用于表征CS / CR和CR诱导的ISC的光谱学。从有机化学家的角度出发，重点放在分子设计原理上，以实现快速有效的CS但缓慢的CR，从而获得长寿命的CT状态。通过示例讨论了电子自旋在控制CS，CR和长寿命CT状态形成中的作用。介绍了时间分辨电子顺磁共振（TREPR）光谱，用于表征CS，CR和ISC过程中的电荷和电子自旋传输。

更新日期：2019-10-12

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