Bo Cui, Jiating Fan, Jinni Liu, Bin Feng, Zhuojun Yan, Lixin Xia, College of Chemistry

Changyuan Gao, Kuo Chu, School of Environment

Xianghui Ruan, Yajie Yang, Ye Yuan, Northeast Normal University

Abstract:Porous aromatic framework materials with high stability, sensitivity, and selectivity have great potential to provide new sensors for optoelectronic/fluorescent probe devices. In this work, a luminescent porous aromatic framework material (LNU-23) was synthesized via the palladium-catalyzed Suzuki cross-coupling reaction of tetrabromopyrene and 1,2-bisphenyldiborate pinacol ester. The resulting PAF solid exhibited strong fluorescence emission with a quantum yield of 18.31%, showing excellent light and heat stability. Because the lowest unoccupied molecular orbital (LUMO) of LNU-23 was higher than that of the nitro compounds, there was an energy transfer from the excited LNU-23 to the analyte, leading to the selective fluorescence quenching with a limit of detection (LOD) ≈ 1.47×10^‐5 M. After integrating the luminescent PAF powder on the paper by a simple dipping method, the indicator papers revealed a fast fluorescence response to gaseous nitrobenzene within 10 s, which shows great potential in outdoor fluorescence detection of nitro compounds.

Read the article here:   153-Integrating a luminescent porous aromatic framework into in-dicator papers for facile, rapid, and selective detection of nitro compounds.pdf