化学
峡湾
猝灭(荧光)
组合化学
物理
荧光
海洋学
量子力学
地质学
作者
Ye‐Qiang Han,Yuan Xie,Jianyu Zhang,Shiyu Tan,Haoke Zhang,Ben Zhong Tang,Jonathan L. Sessler,Feihe Huang
标识
DOI:10.26434/chemrxiv-2023-l1t9c
摘要
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.
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