Cavity Manipulation of Attosecond Charge Migration in Conjugated Dendrimers,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Cavity Manipulation of Attosecond Charge Migration in Conjugated Dendrimers
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-09-18 , DOI: 10.1021/jacs.4c06727
Baicheng Zhang _{1,

2} , Yonghao Gu ₂ , Victor Manuel Freixas ₂ , Shichao Sun ₂ , Sergei Tretiak ₃ , Jun Jiang ₁ , Shaul Mukamel ₂

Affiliation

Dendrimers are branched polymers with wide applications to photosensitization, photocatalysis, photodynamic therapy, photovoltaic conversion, and light sensor amplification. The primary step of numerous photophysical and photochemical processes in many molecules involves ultrafast coherent electronic dynamics and charge oscillations triggered by photoexcitation. This electronic wavepacket motion at short times where the nuclei are frozen is known as attosecond charge migration. We show how charge migration in a dendrimer can be manipulated by placing it in an optical cavity and monitored by time-resolved X-ray diffraction. Our simulations demonstrate that the dendrimer charge migration modes and the character of photoexcited wave function can be significantly influenced by the strong light-matter interaction in the cavity. This presents a new avenue for modulating initial ultrafast charge dynamics and subsequently controlling coherent energy transfer in dendritic nanostructures.

中文翻译：

共轭树枝状聚合物中阿秒电荷迁移的空腔操纵

树枝状聚合物是支化聚合物，广泛应用于光敏、光催化、光动力治疗、光伏转换和光传感器放大等领域。许多分子中众多光物理和光化学过程的第一步涉及由光激发触发的超快相干电子动力学和电荷振荡。这种电子波包在原子核被冻结的短时间内的运动被称为阿秒电荷迁移。我们展示了如何通过将树枝状聚合物放入光学腔中来控制其电荷迁移，并通过时间分辨 X 射线衍射进行监测。我们的模拟表明，树枝状聚合物的电荷迁移模式和光激发波函数的特征会受到腔内强光-物质相互作用的显着影响。这为调节初始超快电荷动力学并随后控制树枝状纳米结构中的相干能量转移提供了一条新途径。

更新日期：2024-09-18

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南