期刊
EUROPEAN POLYMER JOURNAL
卷 189, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2023.111980
关键词
Conjugated microporous polymers; Coupling reaction; Metal ion sensing; Electrochemical performance
This study synthesized three conjugated microporous polymers (CMPs) via Suzuki coupling reaction and characterized their functional groups and chemical structures using FTIR and solid-state NMR analyses. Among the three CMPs, TBN-F CMP showed the highest thermal stability and excellent capacitance and stability for electrochemical measurements. Py-F CMP exhibited specific and selective detection of Pb2+ ions. The findings suggest the potential applications of these CMPs in various fields.
This study aims to synthesize three conjugated microporous polymers (CMPs) [Py-F CMP, TPE-F CMP, and TBN-F CMP] via the Suzuki coupling reaction of 9,9-dihexylfluorene-2,7-diboronic acid [F-B(OH)2] with three bromi-nated derivatives, pyrene (Py), tetraphenylethylene (TPE), and tetrabenzonaphthalene (TBN). The functional groups and chemical structures of the three synthesized CMPs were confirmed using FTIR and solid-state NMR analyses. Thermogravimetric analysis (TGA) revealed that TBN-F CMP has the most outstanding Td10 = 418 degrees C and char yield = 63.3 wt% compared to the other two samples. The BET surface area and average pore size of TBN-F CMP were measured to be 200 m2 g-1 and ca. 1.8 nm, respectively. Furthermore, with excellent pho-toluminescence (PL) properties, all three new CMPs were well characterized using a spectrophotometer, and the fluorescence emission spectra were clearly drawn. As a result, we found that Py-F CMP can detect Pb2+ ions specifically and selectively compared to the other two CMPs. The sensitivity of Pb2+ was calculated and fitted with linear coefficients (R2 = 0.9752) to determine the Pb2+ ion concentration over the ranges of 0.1-2.0 mu M, and the detection limit was estimated to be 0.01 mu M. Finally, with outstanding capacitance and stability of up to 195 F g-1 and 90% over 2000 cycles, TBN-F-based CMP has been successfully applied to electrochemical measurements.
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