Intercluster aurophilicity-driven aggregation lighting circularly polarized luminescence of chiral gold clusters

Zhen Han; Xueli Zhao; Peng Peng; Si Li; Chong Zhang; Man Cao; Kai Li; Zhao-Yang Wang; Shuang-Quan Zang

doi:10.1007/s12274-020-2997-0

Nano Research 2020, 13(12): 3248-3252 https://doi.org/10.1007/s12274-020-2997-0

Research Article | Issue | Published: 25 August 2020

Intercluster aurophilicity-driven aggregation lighting circularly polarized luminescence of chiral gold clusters

Show Author's Information Hide Author's Information Zhen Han^{^§}, Xueli Zhao^{^§}, Peng Peng, Si Li, Chong Zhang, Man Cao, Kai Li, Zhao-Yang Wang(

), Shuang-Quan Zang(

)

Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China

^§Zhen Han and Xueli Zhao contributed equally to this work.

Keywords:

aggregation-induced emission, atomic precision, gold cluster, intercluster aurophilicity, circularly polarized luminescence

Topics:

Binary alloys Gold alloys Gold compounds Metals Organic light emitting diodes (OLED) Photoluminescence

Cite this article:

Han Z, Zhao X, Peng P, et al. Intercluster aurophilicity-driven aggregation lighting circularly polarized luminescence of chiral gold clusters. Nano Research, 2020, 13(12): 3248-3252. https://doi.org/10.1007/s12274-020-2997-0

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Abstract Full text Electronic supplementary material About this article

Abstract

Herein, we prepared two novel pairs of enantiomeric gold cluster complexes, Au₄PL₄/Au₄PD₄ and (Au₄L₄)_n/(Au₄D₄)_n with atomic precision. In Au₄PL₄/Au₄PD₄, the discrete chiral Au₄-based aggregation-induced emission (AIE) luminogens are separated by bulky substitutes. The corresponding aggregates are cyan-emitting with a photoluminescence quantum yield (PLQY) of 14.4%. Upon decreasing the size of the substituents, these chiral Au₄ clusters are strung together by inter-cluster Au-Au interactions, which cause a low-energy green emission from the aggregated (Au₄L₄)_n/(Au₄D₄)_n with a much higher PLQY of 41.4% and more intense circularly polarised photoluminescence (CPL) with a dissymmetry factor |g_PL| of 7.0 × 10^-3. Using (Au₄L₄)_n/(Au₄D₄)_n, circularly polarised organic light-emitting diodes (CP-OLEDs) were for the first time fabricated with |g_EL| = |g_PL|. These findings signify that inter-cluster metallophilic interactions are a new and important type of driving force for AIE and crystallization-induced emission (CIE), suggesting great potential of CPL-active metal clusters in CP-OLEDs.

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About this article

Intercluster aurophilicity-driven aggregation lighting circularly polarized luminescence of chiral gold clusters

Show Author's information Hide Author's Information Zhen Han^{^§}, Xueli Zhao^{^§}, Peng Peng, Si Li, Chong Zhang, Man Cao, Kai Li, Zhao-Yang Wang(

), Shuang-Quan Zang(

)

Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China

^§Zhen Han and Xueli Zhao contributed equally to this work.

Abstract

Keywords: aggregation-induced emission, atomic precision, gold cluster, intercluster aurophilicity, circularly polarized luminescence

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Publication history

Acknowledgements

Publication history

Received: 27 June 2020

Revised: 18 July 2020

Accepted: 20 July 2020

Published: 25 August 2020

Issue date: December 2020

Copyright

Acknowledgements

This work was supported by the National Science Fund for Distinguished Young Scholars (No. 21825106), the National Natural Science Foundation of China (No. 21671175), the Program for Science & Technology Innovation Talents in Universities of Henan Province (No. 164100510005), the Program for Innovative Research Team (in Science and Technology) in Universities of Henan Province (No. 19IRTSTHN022) and Zhengzhou University.