期刊
CHEMISTRY OF MATERIALS
卷 34, 期 22, 页码 10181-10189出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.2c03025
关键词
-
资金
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- [52173200]
- [21871108]
- [BX2021112]
This study reports on the photoluminescence properties of a macrocycle modified with donor-acceptor motifs. The macrocycle exhibits unexpected intramolecular through-space charge transfer and aggregation-induced emission properties, with the ratio of different emissions being easily affected by the environment. Additionally, the macrocycle also displays a pronounced color-changing behavior in the presence of common nitrile vapors with varying hydrocarbon chain lengths.
Macrocycles modified with donor (D)-acceptor (A) motifs are generally believed as advanced organic fluorophores with exceptional photo -physical properties. However, it is still necessary to develop intrinsic D-A-type macrocycles without complicated modifications due to their significant implications in fabricating high-performance emissive materials. Herein, we report on the photoluminescence properties of pillar[4]arene[1]dicyanobenzene (P5-2CN), a pillar[5]arene derivative containing one p-phenylene dicyano unit. The rigid pillar conformation and nonconjugated architecture endow P5-2CN with unanticipated intramolecular through-space charge transfer (TSCT) and aggregation-induced emission properties, by which the ratio of locally excited state emission and TSCT emission can be easily affected by their residing environment. Intriguingly, P5-2CN solid powder displays a profound vapor -chromic behavior for common nitrile vapors with different hydrocarbon chain lengths. Experimental and theoretical analyses reveal that intramolecular through-space conjugation is critical for such unusual photoluminescence.
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