Synthesis and Photophysics of Phenylene Based Triplet Donor–Acceptor Dyads: ortho vs. para Positional Effect on Intramolecular Triplet Energy Transfer
Synthesis and Photophysics of Phenylene Based Triplet Donor–Acceptor Dyads: ortho vs. para Positional Effect on Intramolecular Triplet Energy Transfer
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DOI：
10.1016/j.jpap.2022.100112
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发表时间：
2022-02
影响因子：
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通讯作者：
Young Ju Yun;Manoj K. Manna;N. Kamatham;Jingbai Li;Shuyang Liu;Francesca Peccati;Barry C. Pemberton;G. Wiederrecht;D. Gosztola;Gonzalo Jiménez‐Osés;A. Rogachev;A. Jean-Luc Ayitou
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作者：
Young Ju Yun;Manoj K. Manna;N. Kamatham;Jingbai Li;Shuyang Liu;Francesca Peccati;Barry C. Pemberton;G. Wiederrecht;D. Gosztola;Gonzalo Jiménez‐Osés;A. Rogachev;A. Jean-Luc Ayitou
合成了两种基于亚苯基的几何/异构三重邻位和对位二联体（分别为o-3和p-3），并使用先进的电子物理工具和计算对其进行了全面表征。在dyado-3中，通过空间给体-受体相互作用导致同时的三重态能量转移和电荷转移具有相同的动力学。另一方面，在dyadp-3中，发现亚苯基间隔有利于快速三重态能量离域超过电荷转移过程。此外，对本研究结果的分析表明，光激发物种（o-3）* 的失活通过本征沟道即S 0 <$S1和电荷复合两种方式发生。在双ADP-3的情况下，结果表明，主要的失活途径是自猝灭或三重态-三重态湮灭涉及受体单元（S）。
Two phenylene based geometrical/isomeric tripletortho- andpara–dyads (o–3andp–3, respectively) were synthesized and fully characterized using advanced photophysical tools and computations. In dyado–3, the through-space donor-acceptor interactions led to simultaneous triplet energy transfer and charge transfer with identical kinetics. On the other hand, in the dyadp–3, it was found that the phenylene spacer favors a fast triplet energy delocalization over the charge transfer process. Furthermore, analysis of the results from the present investigation indicates that the deactivation of the photo-excited species (o–3)* occurs through both the intrinsic channelviz.S0←S1and charge recombination. In the case of dyadp–3, the results indicate that the primary deactivation pathway is self-quenching or triplet-triplet annihilation involving the acceptor unit(s).