Abstract

The synthesis and optoelectronic functions of a germole-containing π-conjugated polymer prepared by the reaction of a lithiated polymer precursor are described. A regioregular organometallic polymer having 1,4-dilithio-1,3-butadiene and 9,9-dioctylfluorene-2,7-diyl units was generated by the reaction of a tellurophene-containing polymer having a number-average molecular weight (M_n) and molecular weight distribution (M_w/M_n) of 5900 and 1.9, respectively, with n-butyllithium (2.4 equiv) at −78 to −60 °C for 3 h. The prepared lithiated polymer was reacted with dimethylgermanium dichloride (1.5 equiv) at −60 °C to ambient temperature for 12 h in tetrahydrofuran to produce a π-conjugated polymer possessing 1,1-dimethylgermole-2,5-diyl units in 76% yield (M_n = 4400 and M_w/M_n = 1.7). The absorption maximum and onset of the obtained polymer were observed at 465 and 535 nm, respectively, in the UV-vis spectrum, from which the optical band gap of the polymer was estimated to be 2.31 eV. In the photoluminescence spectrum, the obtained polymer exhibits green fluorescence with an emission maximum of 547 nm and a quantum yield of 0.04. The chemical interaction of the dimethylgermole-containing π-conjugated polymer with fluoride was also examined in terms of the changes observed in the UV-vis absorption spectra.

中文翻译：

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含碲的聚合物的Te-Li交换反应制备含reaction的π共轭聚合物

摘要

描述了通过锂化的聚合物前体的反应制备的含胚芽的π-共轭聚合物的合成和光电功能。通过具有数均分子量（M _n）的含碲吩的聚合物的反应，生成具有1,4-二硫代-1,3-丁二烯和9,9-二辛基芴-2,7-二基单元的区域规则的有机金属聚合物。）和分子量分布（M _w / M _n）分别为5900和1.9，其中n-78至-60°C的丁基丁基锂（2.4当量）3 h。将制备的锂化聚合物与二氯二甲基锗（1.5当量）在-60°C到环境温度下在四氢呋喃中反应12小时，以76％的收率生产具有1,1-二甲基锗-2,5-二基单元的π共轭聚合物。 （M _n  = 4400和M _w / M _n = 1.7）。在UV-可见光谱中分别在465nm和535nm处观察到所获得的聚合物的最大吸收和开始，据此估计聚合物的光学带隙为2.31eV。在光致发光光谱中，获得的聚合物表现出绿色荧光，其最大发射为547nm，量子产率为0.04。还根据在UV-vis吸收光谱中观察到的变化检查了含二甲基锗烷的π-共轭聚合物与氟化物的化学相互作用。