Intensive Near-Infrared Emitting Au7Cu10 Nanoclusters for Both Energy and Electron Harvesting

IF 7.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chemical Science Pub Date : 2025-04-14 DOI:10.1039/d5sc00671f

Wei Zhang, Tingting Xu, Jie Kong, Yuanming Li, Xiaoguo Zhou, Jiachen Zhang, Qun Zhang, Yongbo Song, Yi Luo, Meng Zhou

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引用次数: 0

Abstract

Triplet excitons have gained increasing recognition as inherent characteristics of various nanomaterials. However, the practical application of triplet excitons is limited due to their confinement within the material where they originate, posing significant challenges to harnessing their potential. In this work, we report direct extraction of both triplet energy and electrons from newly synthesized atomically precise Au₇Cu₁₀ nanoclusters (NCs). These NCs exhibit intensive near-infrared (NIR) emission with a quantum yield of 31% at room temperature. They also display near-unity quantum yield of intersystem crossing (ISC) with strong spin-orbit coupling (SOC) up to 864 cm^-1. Consequently, Au₇Cu₁₀ NCs can act as triplet sensitizers, facilitating efficient triplet-triplet annihilation and achieving upconverted emission with an efficiency of 18.4% in perylene. Furthermore, rapid electron injection from Au₇Cu₁₀ NCs in triplet state to methyl viologen was clearly observed. This study represents the first direct extraction of both triplet energy and electrons from same metal NCs, indicating their potential as molecular triplet energy and electron surrogates in optoelectronics, photocatalysis, and solar energy conversion.

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近红外强发射Au7Cu10纳米团簇用于能量和电子收集

三重态激子作为各种纳米材料的固有特性，越来越受到人们的重视。然而，三重态激子的实际应用受到限制，因为它们被限制在它们产生的材料中，这对利用它们的潜力提出了重大挑战。在这项工作中，我们报道了从新合成的原子精度的Au7Cu10纳米团簇（NCs）中直接提取三重态能量和电子。这些纳米材料在室温下表现出强烈的近红外（NIR）发射，量子产率为31%。具有强自旋-轨道耦合（SOC）的系统间交叉（ISC）的近单位量子产率高达864 cm-1。因此，Au7Cu10纳米碳化物可以作为三重态敏化剂，促进高效的三重态-三重态湮灭，并在苝中实现上转换发射，效率为18.4%。此外，还观察到三态Au7Cu10 NCs向甲基紫胶的快速电子注入。这项研究首次直接从同一金属nc中提取了三重态能量和电子，表明了它们在光电子学、光催化和太阳能转换中作为分子三重态能量和电子替代品的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Science CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

4.80%

发文量

1352

审稿时长

2.1 months

期刊介绍： Chemical Science is a journal that encompasses various disciplines within the chemical sciences. Its scope includes publishing ground-breaking research with significant implications for its respective field, as well as appealing to a wider audience in related areas. To be considered for publication, articles must showcase innovative and original advances in their field of study and be presented in a manner that is understandable to scientists from diverse backgrounds. However, the journal generally does not publish highly specialized research.