Structural distortion and electron redistribution in dual-emitting gold nanoclusters.

Nature Communications
Qi LiRongchao Jin

Abstract

Deciphering the complicated excited-state process is critical for the development of luminescent materials with controllable emissions in different applications. Here we report the emergence of a photo-induced structural distortion accompanied by an electron redistribution in a series of gold nanoclusters. Such unexpected slow process of excited-state transformation results in near-infrared dual emission with extended photoluminescent lifetime. We demonstrate that this dual emission exhibits highly sensitive and ratiometric response to solvent polarity, viscosity, temperature and pressure. Thus, a versatile luminescent nano-sensor for multiple environmental parameters is developed based on this strategy. Furthermore, we fully unravel the atomic-scale structural origin of this unexpected excited-state transformation, and demonstrate control over the transition dynamics by tailoring the bi-tetrahedral core structures of gold nanoclusters. Overall, this work provides a substantial advance in the excited-state physical chemistry of luminescent nanoclusters and a general strategy for the rational design of next-generation nano-probes, sensors and switches.

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Citations

Jun 25, 2020·Journal of Biomolecular Structure & Dynamics·Rupesh V ChikhaleShailendra S Gurav
Jan 22, 2021·The Journal of Physical Chemistry Letters·Mikkel B LiisbergTom Vosch
May 14, 2021·Advanced Materials·Yingwei LiRongchao Jin
Aug 14, 2020·ACS Nano·Qi LiX Wendy Gu
Aug 23, 2021·The Journal of Chemical Physics·Shana Havenridge, Christine M Aikens
Oct 8, 2021·Advanced Materials·Tiankai ChenJianping Xie

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Methods Mentioned

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