Namgung Ho, Lee Jeong Jun, Gwon Young Jin, Lee Taek Seung
Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University Daejeon 34134 Korea
RSC Adv. 2018 Oct 5;8(60):34291-34296. doi: 10.1039/c8ra06463f. eCollection 2018 Oct 4.
Conjugated microporous polymers (CMPs) containing tetraphenylethylene (TPE) were synthesized the Suzuki coupling polymerization. The tetrafunctional TPE moiety in the polymer backbone was linked with the difunctional phenylene group to exhibit a porous structure with high fluorescence in the solid state because of aggregation-induced emissive TPE. The porous polymer with a fluorescent TPE group successfully detected nitroaromatic explosive compounds that exhibited fluorescence quenching, in which the polymer shows high quenching efficiency to picric acid among nitroaromatic explosive compounds. The interaction between the electron-rich TPE group and the electron-deficient nitroaromatic compounds played a decisive role in fluorescence quenching a photoinduced electron transfer (PET). Compared with a linear polymer containing TPE, the porous, crosslinked polymer showed better sensing performance toward nitroaromatic compounds, presumably because of the more efficient interaction between TPE and nitroaromatic compounds in the pores of TPE-based CMP (TPE-CMP).
通过铃木偶联聚合反应合成了含有四苯乙烯（TPE）的共轭微孔聚合物（CMP）。聚合物主链中的四官能团TPE部分与双官能团亚苯基相连，由于聚集诱导发光的TPE，呈现出固态下具有高荧光的多孔结构。具有荧光TPE基团的多孔聚合物成功检测到呈现荧光猝灭的硝基芳香族爆炸化合物，其中该聚合物对硝基芳香族爆炸化合物中的苦味酸表现出高猝灭效率。富电子的TPE基团与缺电子的硝基芳香族化合物之间的相互作用在通过光致电子转移（PET）实现的荧光猝灭中起决定性作用。与含有TPE的线性聚合物相比，多孔交联聚合物对硝基芳香族化合物表现出更好的传感性能，这可能是因为TPE与基于TPE的CMP（TPE-CMP）孔中的硝基芳香族化合物之间的相互作用更有效。
