Narrowband clusteroluminescence with 100% quantum yield enabled by through-space conjugation of asymmetric conformation

Yipu Wang, Jianyu Zhang, Qingyang Xu, Weihao Tu, Lei Wang, Yuan Xie, Jing Zhi Sun, Feihe Huang, Haoke Zhang () and Ben Zhong Tang ()
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Yipu Wang: Zhejiang University
Jianyu Zhang: The Hong Kong University of Science and Technology
Qingyang Xu: Zhejiang University
Weihao Tu: Zhejiang University
Lei Wang: Zhejiang University
Yuan Xie: Zhejiang University
Jing Zhi Sun: Zhejiang University
Feihe Huang: Zhejiang University
Haoke Zhang: Zhejiang University
Ben Zhong Tang: Zhejiang University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Different from traditional organic luminescent materials based on covalent delocalization, clusteroluminescence from nonconjugated luminogens relies on noncovalent through-space conjugation of electrons. However, such spatial electron delocalization is usually weak, resulting in low luminescent efficiency and board emission peak due to multiple vibrational energy levels. Herein, several nonconjugated luminogens are constructed by employing biphenyl as the building unit to reveal the structure-property relationship and solve current challenges. The intramolecular through-space conjugation can be gradually strengthened by introducing building units and stabilized by rigid molecular skeleton and multiple intermolecular interactions. Surprisingly, narrowband clusteroluminescence with full width at half-maximum of 40 nm and 100% efficiency is successfully achieved via an asymmetric conformation, exhibiting comparable performance to the traditional conjugated luminogens. This work realizes highly efficient and narrowband clusteroluminescence from nonconjugated luminogens and highlights the essential role of structural conformation in manipulating the photophysical properties of unconventional luminescent materials.

Date: 2024
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DOI: 10.1038/s41467-024-50815-x

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