Fluorescence-based monitoring of the pressure-induced aggregation microenvironment evolution for an AIEgen under multiple excitation channels

Shuang Tong, Jianhong Dai, Jiangman Sun, Yuanyuan Liu, Xiaoli Ma, Zhehong Liu, Teng Ma, Jiao Tan, Zhen Yao, Shanmin Wang, Haiyan Zheng, Kai Wang, Fang Hong, Xiaohui Yu (), Chunxiao Gao () and Xinggui Gu ()
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Shuang Tong: Jilin University
Jianhong Dai: Chinese Academy of Sciences
Jiangman Sun: Beijing University of Chemical Technology
Yuanyuan Liu: Jilin University
Xiaoli Ma: Chinese Academy of Sciences
Zhehong Liu: Chinese Academy of Sciences
Teng Ma: Jilin University
Jiao Tan: Chinese Academy of Sciences
Zhen Yao: Jilin University
Shanmin Wang: Southern University of Science and Technology
Haiyan Zheng: Center for High Pressure Science and Technology Advanced Research
Kai Wang: Jilin University
Fang Hong: Chinese Academy of Sciences
Xiaohui Yu: Chinese Academy of Sciences
Chunxiao Gao: Jilin University
Xinggui Gu: Beijing University of Chemical Technology

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract The development of organic solid-state luminescent materials, especially those sensitive to aggregation microenvironment, is critical for their applications in devices such as pressure-sensitive elements, sensors, and photoelectric devices. However, it still faces certain challenges and a deep understanding of the corresponding internal mechanisms is required. Here, we put forward an unconventional strategy to explore the pressure-induced evolution of the aggregation microenvironment, involving changes in molecular conformation, stacking mode, and intermolecular interaction, by monitoring the emission under multiple excitation channels based on a luminogen with aggregation-induced emission characteristics of di(p-methoxylphenyl)dibenzofulvene. Under three excitation wavelengths, the distinct emission behaviors have been interestingly observed to reveal the pressure-induced structural evolution, well consistent with the results from ultraviolet-visible absorption, high-pressure angle-dispersive X-ray diffraction, and infrared studies, which have rarely been reported before. This finding provides important insights into the design of organic solid luminescent materials and greatly promotes the development of stimulus-responsive luminescent materials.

Date: 2022
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DOI: 10.1038/s41467-022-32968-9

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