Distance makes a difference in crystalline photoluminescence

Zibao Gan, Yungui Liu, Lin Wang, Shuqing Jiang, Nan Xia, Zhipeng Yan, Xiang Wu, Junran Zhang, Wanmiao Gu, Lizhong He, Jingwu Dong, Xuedan Ma, Jaeyong Kim, Zhongyan Wu, Yixuan Xu, Yanchun Li and Zhikun Wu ()
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Zibao Gan: Chinese Academy of Sciences
Yungui Liu: China University of Geosciences
Lin Wang: Center for High Pressure Science and Technology Advanced Research
Shuqing Jiang: Chinese Academy of Sciences
Nan Xia: Chinese Academy of Sciences
Zhipeng Yan: Center for High Pressure Science and Technology Advanced Research
Xiang Wu: China University of Geosciences
Junran Zhang: Chinese Academy of Sciences
Wanmiao Gu: Chinese Academy of Sciences
Lizhong He: Chinese Academy of Sciences
Jingwu Dong: Chinese Academy of Sciences
Xuedan Ma: Argonne National Laboratory
Jaeyong Kim: Hanyang University
Zhongyan Wu: Center for High Pressure Science and Technology Advanced Research
Yixuan Xu: Chinese Academy of Sciences
Yanchun Li: Chinese Academy of Sciences
Zhikun Wu: Chinese Academy of Sciences

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Crystallization-induced photoluminescence weakening was recently revealed in ultrasmall metal nanoparticles. However, the fundamentals of the phenomenon are not understood yet. By obtaining conformational isomer crystals of gold nanoclusters, we investigate crystallization-induced photoluminescence weakening and reveal that the shortening of interparticle distance decreases photoluminescence, which is further supported by high-pressure photoluminescence experiments. To interpret this, we propose a distance-dependent non-radiative transfer model of excitation electrons and support it with additional theoretical and experimental results. This model can also explain both aggregation-induced quenching and aggregation-induced emission phenomena. This work improves our understanding of aggregated-state photoluminescence, contributes to the concept of conformational isomerism in nanoclusters, and demonstrates the utility of high pressure studies in nanochemistry.

Date: 2020
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DOI: 10.1038/s41467-020-19377-6

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