Mechanism of the Non-Kasha Fluorescence in Pyrene

IF 4.8 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Journal of Computational Chemistry Pub Date : 2025-01-28 DOI:10.1002/jcc.70040
Sourav Majumdar, Robin Grotjahn, Ahmadreza Rajabi, Bibo Feng, Luke Nambi Mohanam, Gabriel S. Phun, Nicolas Lutfi, Mohammad Khan, Dmitrij Rappoport, Filipp Furche
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Abstract

The high-energy shoulder in the gas-phase fluorescence emission spectrum of pyrene is a well-known example of non-Kasha emission. We comparatively assess two approaches, vibronic perturbation theory and nonadiabatic dynamics, in their ability to predict and explain the gas-phase fluorescence spectrum of pyrene. While both methods qualitatively capture the non-Kasha emission, they differ in their computational requirements, accuracy, and physical interpretation. Vibronic perturbation theory and nonadiabatic dynamics are complementary and can be combined in a two-step approach to non-Kasha fluorescence.

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非卡沙荧光在芘中的作用机理
芘气相荧光发射光谱中的高能肩是众所周知的非卡沙发射实例。我们比较评估了振动扰动理论和非绝热动力学这两种方法预测和解释芘气相荧光光谱的能力。虽然这两种方法都能定性地捕捉到非卡沙发射,但它们在计算要求、准确性和物理解释方面存在差异。振动扰动理论和非绝热动力学是相辅相成的,可以通过两步法结合起来解决非卡沙荧光问题。
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来源期刊
CiteScore
6.60
自引率
3.30%
发文量
247
审稿时长
1.7 months
期刊介绍: This distinguished journal publishes articles concerned with all aspects of computational chemistry: analytical, biological, inorganic, organic, physical, and materials. The Journal of Computational Chemistry presents original research, contemporary developments in theory and methodology, and state-of-the-art applications. Computational areas that are featured in the journal include ab initio and semiempirical quantum mechanics, density functional theory, molecular mechanics, molecular dynamics, statistical mechanics, cheminformatics, biomolecular structure prediction, molecular design, and bioinformatics.
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