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首页> 外文期刊>Chemistry: A European journal >From nitro- to sulfonyl-based chromophores: Improvement of the comprehensive performance of nonlinear optical dendrimers
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From nitro- to sulfonyl-based chromophores: Improvement of the comprehensive performance of nonlinear optical dendrimers

机译：从基于硝基到基于磺酰基的生色团：改进非线性光学树枝状聚合物的综合性能

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摘要

Through the combination of the divergent and convergent approaches, coupled with the utilization of the powerful Sharpless "click-chemistry" reaction, two series of sulfonyl-based high-generation NLO dendrimers were conveniently prepared with high purity and in satisfactory yields. Thanks to the perfect three-dimensional (3D) spatial isolation from the highly branched structure and the isolation effect of the exterior benzene moieties and the interior triazole rings, these dendrimers exhibited large second harmonic generation coefficient (d_(33)) values up to 181 pm V~(-1), which, to the best of our knowledge, is the highest value so far for polymers containing sulfonyl-based chromophore moieties. Meanwhile, compared with the nitro-chromophore-based analogues, their optical transparency and NLO stability were improved in a large degree, due to the lower dipole moment (μ) and the special main-chain structure of sulfonyl-based chromophore in these dendrimers.
机译：通过发散和收敛方法的结合，再加上强大的Sharpless“点击化学”反应的利用，可以方便地以高纯度和令人满意的产率制备两个系列的基于磺酰基的高代NLO树状聚合物。得益于高支化结构的完美三维（3D）空间隔离以及外部苯部分和内部三唑环的隔离效果，这些树枝状分子显示出高达181的大二次谐波生成系数（d_（33））值据我们所知，pm V〜（-1）是迄今为止含有磺酰基基生色团部分的聚合物的最高值。同时，与基于硝基发色团的类似物相比，由于这些树枝状聚合物中较低的偶极矩（μ）和基于磺酰基的发色团的特殊主链结构，它们的光学透明度和NLO稳定性得到了很大程度的提高。

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