Fjord-Type AIEgens Based on Inherent Through-Space Conjugation
Preprint 2023 en
Authors
YH
Ye‐Qiang Han
YX
Yuan Xie
JZ
Jianyu Zhang
Abstract
1 min read
Through-space conjugation (TSC) is a noncovalently electronic interaction that is emerging as a potential complement to through-bond conjugation (TBC)-based strategies for constructing luminescent materials. However, the design of efficient luminogens based on TSC is currently challenging due to a lack of established structure-property understanding. This is particularly true in the case of luminogens displaying aggregation-induced emission (AIE) effects. In this work, three terphenyl derivatives were prepared, and their photophysical properties were systemically studied. It was found that relative to the corresponding m- and p-linked analogues, the electronic interaction of TBC is weakened while the strength of TSC is commensurately enhanced in the constitutional isomer containing an o-linked Fjord-type subunit. Within this set of luminogens, the presence of a Fjord-type arrangement promotes a transformation from aggregation-caused quenching (ACQ) to AIE. Further investigations involving congeneric quaterphenyl and pentphenyl isomers support the universality of the Fjord-type unit as a framework for synthesizing AIE-active luminogens (AIEgens) with inherent TSC. This work not only provides a novel set of AIEgens but also establishes the utility of TSC in controlling the photophysical properties of nonconventional and twisted luminogens.
Jianyu Zhang, Lianrui Hu, Kaihua Zhang, Junkai Liu, Xingguang Li, Haoran Wang, Zhaoyu Wang, Herman H. Y. Sung, Ian D. Williams, Zebing Zeng, Jacky W. Y. Lam, Haoke Zhang, Ben Zhong Tang
Jianyu Zhang, Lianrui Hu, Kaihua Zhang, Junkai Liu, Xingguang Li, Haoran Wang, Zhaoyu Wang, Herman H. Y. Sung, Ian D. Williams, Zebing Zeng, Jacky W. Y. Lam, Haoke Zhang, Ben Zhong Tang
Jianyu Zhang, Lianrui Hu, Kaihua Zhang, Junkai Liu, Xingguang Li, Haoran Wang, Zhaoyu Wang, Herman H. Y. Sung, Ian D. Williams, Zebing Zeng, Jacky W. Y. Lam, Haoke Zhang, Ben Zhong Tang
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