用于近红外发射的原子精密铸造金属纳米团簇:激发态动力学和机制。

IF 39 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Ze-Yu Liu, Qing-Bin Nie, Bao-Liang Han, Rakesh Kumar Gupta, Guang-Lei Dong, Geng-Geng Luo, Zhi-Lin Yang and Di Sun
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引用次数: 0

摘要

了解原子精密铸造金属纳米团簇(cmccs)的激发态动力学对于阐明其光致发光(PL)机制和合理调整发射特性至关重要,特别是在近红外(NIR)区域,基于cmccs的纳米材料在生物医学和光电应用方面具有巨大的潜力。本文综述了利用时间分辨光谱和时间依赖密度泛函理论(TD-DFT)计算的协同集成,系统和全面地介绍了在原子精度研究nir发射cnc的激发态动力学和PL机制方面的最新进展。与以往广泛研究CMNC性质的综述不同,本综述特别关注内在因素,强调分子振动特征和电子结构调制是近红外发射的关键决定因素。我们首先概述了时间分辨光谱技术-包括飞秒和纳秒瞬态吸收(fs-/ns-TA)和时间分辨荧光光谱(TRFS)-如何与TD-DFT建模相结合,促进对cnc的弛豫动力学、光物理行为和潜在电子结构的探测。然后,我们重点介绍了这些先进技术如何揭示相干振荡和激发态弛豫在决定PL效率和特性中的作用,同时深入研究了诸如配体固化、金属掺杂、核工程和诱导结构转换等策略,这些策略抑制了非辐射衰变途径,从而提高了近红外PL在近红外区域的量子产率(PLQY)。最后,我们讨论了当前的挑战和未来的机遇,以加深我们对nir发射cnc的光学特性和激发态动力学的理解,强调了先进的实验方法和合理的设计策略来优化其功能以适应新兴应用的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Atom-precise coinage metal nanoclusters for near-infrared emission: excited-state dynamics and mechanisms

Atom-precise coinage metal nanoclusters for near-infrared emission: excited-state dynamics and mechanisms

Understanding the excited-state dynamics of atomically precise coinage metal nanoclusters (CMNCs) is pivotal for elucidating their photoluminescence (PL) mechanisms and rationally tuning emission properties—particularly in the near-infrared (NIR) region, where CMNC-based nanomaterials have tremendous potential for biomedical and optoelectronic applications. This review presents a systematic and comprehensive account of recent advances in investigating the excited-state dynamics and PL mechanisms of NIR-emitting CMNCs with atomic precision, leveraging the synergistic integration of time-resolved spectroscopy and time-dependent density functional theory (TD-DFT) calculations. Distinct from previous reviews that offer a broad survey of CMNC properties, the present review focuses specifically on intrinsic factors, highlighting molecular vibrational features and electronic structure modulation as key determinants of NIR emission. We begin by outlining how time-resolved spectroscopic techniques—including femtosecond and nanosecond transient absorption (fs-/ns-TA) and time-resolved fluorescence spectroscopy (TRFS)—coupled with TD-DFT modeling, facilitate the probing of relaxation dynamics, photophysical behaviors, and the underlying electronic structures of CMNCs. We then highlight how these advanced techniques reveal the role of coherent oscillations and excited-state relaxation in dictating PL efficiency and characteristics, while delving into strategies such as ligand rigidification, metal doping, kernel engineering, and induced structural transformations that suppress non-radiative decay pathways and thereby enhance NIR PL quantum yield (PLQY) in the NIR region. Finally, we conclude by discussing the current challenges and future opportunities in deepening our understanding of optical properties and excited-state dynamics of NIR-emitting CMNCs, underscoring the imperative for advanced experimental methodologies and rational design strategies to optimize their functionalities for emerging applications.

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来源期刊
Chemical Society Reviews
Chemical Society Reviews 化学-化学综合
CiteScore
80.80
自引率
1.10%
发文量
345
审稿时长
6.0 months
期刊介绍: Chemical Society Reviews is published by: Royal Society of Chemistry. Focus: Review articles on topics of current interest in chemistry; Predecessors: Quarterly Reviews, Chemical Society (1947–1971); Current title: Since 1971; Impact factor: 60.615 (2021); Themed issues: Occasional themed issues on new and emerging areas of research in the chemical sciences
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