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首页> 外文期刊>Polymers for advanced technologies >Two thieno[3,4b]pyrazine-containing copolymers: synthesis, characterization, and application in mercury ions detection
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Two thieno[3,4b]pyrazine-containing copolymers: synthesis, characterization, and application in mercury ions detection

机译：两种含噻吩并[3,4b]吡嗪的共聚物：合成，表征和在汞离子检测中的应用

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摘要

Two alternative copolymers of thieno[3,4b]pyrazine (TPZ) and triphenylamine (TPA) or phenylene (Ph), P(TPA-TPZ) and P(Ph-TPZ), were synthesized by Wittig-Horner polycondensation and characterized by ~1H NMR, elemental analysis, GPC, TGA, cyclic voltammetry, UV-Vis absorption, and photoluminescence (PL) spectroscopy. The polymers are soluble in common organic solvents and possess good thermal stability. Both of them shows strong solvatochromism phenomenon when dissolved in different solvents. The fluorescence of the copolymer solutions is efficiently quenched upon the addition of Hg~(2+), indicating that the two copolymers could be good Hg~(2+) detectors. More interestingly, the copolymers show high selectivity for the (Hg)~(2+) detection and P(TPA-TPZ) shows higher sensitivity and selectivity toward the (Hg)~(2+) detection than P(Ph-TPZ) does in the presence of other competing metal ions. The results imply that the conjugated polymers (CPs) containing the thieno[3,4b]pyrazine moiety are promising materials for chemosensors.
机译：通过维蒂希-霍纳缩聚反应合成了噻吩并[3,4b]吡嗪（TPZ）和三苯胺（TPA）或亚苯基（Ph）的两种替代共聚物P（TPA-TPZ）和P（Ph-TPZ），并通过〜表征1 H NMR，元素分析，GPC，TGA，循环伏安法，UV-Vis吸收和光致发光（PL）光谱。该聚合物可溶于常见的有机溶剂，并具有良好的热稳定性。当溶解在不同的溶剂中时，它们都表现出很强的溶剂致变色现象。加入Hg〜（2+）可以有效地淬灭共聚物溶液的荧光，表明这两种共聚物可能是好的Hg〜（2+）检测器。更有趣的是，该共聚物对（Hg）〜（2+）的检测具有很高的选择性，而P（TPA-TPZ）对Pb（TP-TPZ）的检测对Hg（Hg）〜（2+）具有更高的灵敏度和选择性。在其他竞争性金属离子的存在下。结果表明，含有噻吩并[3,4b]吡嗪部分的共轭聚合物（CP）是化学传感器的有前途的材料。

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