So far, second-order nonlinear optical (NLO) hyperbranched polymers have been widely reported; however, introduction of highly polarizable NLO chromophores into them remains a challenge. In this work, we have successfully prepared a tetracyanobutadienyl (TCBD)-based AB₂-type hyperbranched polymer HP3 by integrating double click-type postfunctionalization reactions including Cu(I)-catalyzed Huisgen's 1,3-dipolar cycloaddition and alkyne-TCNE [2 + 2] cycloaddition. The NLO property of HP3 was carefully studied based on the second-harmonic generation (SHG) measurement, showing a SHG coefficient of 55.6 pm V⁻¹ and good alignment stability with a depoling temperature of 125 °C.

中文翻译：

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通过方便的点击型后功能化制备的基于TCBD的AB2型二阶非线性光学超支化聚合物

迄今为止，已经广泛报道了二阶非线性光学（NLO）超支化聚合物。然而，将高度可极化的NLO生色团引入其中仍然是一个挑战。在这项工作中，我们已经成功地通过整合双击型后官能化反应（包括Cu（I）催化的Huisgen的1,3-偶极环加成反应和炔烃-TCNE [2 ]）成功制备了基于四氰基丁二烯（TCBD）的AB ₂型超支化聚合物HP3。+ 2]环加成。基于二次谐波生成（SHG）测量，仔细研究了HP3的NLO特性，显示出SHG系数为55.6 pm V ^-1，并且极化温度为125°C时具有良好的对准稳定性。