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首页> 外文期刊>Chemistry: A European journal >Poly(9,9'-diheylfluorene carbazole) functionalized with reduced graphene oxide: Convenient synthesis using nitrogen-based nucleophiles and potential applications in optical limiting
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Poly(9,9'-diheylfluorene carbazole) functionalized with reduced graphene oxide: Convenient synthesis using nitrogen-based nucleophiles and potential applications in optical limiting

机译：用还原的氧化石墨烯官能化的聚（9,9'-二己基芴咔唑）：使用基于氮的亲核试剂的便捷合成及其在光学限制中的潜在应用

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摘要

Covalently functionalized reduced graphene oxide (RGO) sheet was prepared by treating nitrogen-centered anions generated from poly(9,9'-diheylfluorene carbazole) (PCF) with GO. The resultant hybrids with different chemical behavior were separated by centrifugation. The covalent modification was fully characterized by IR spectroscopy, UV/Vis spectroscopy, thermogravimetric analysis (TGA), Raman spectroscopy, TEM, and SEM. It was found that RGO-PCF-s, the soluble part, was split into small platelets with a size of about 200 nm, and the hydrophobic polymer PCF became hydrophilic after wrapping by RGO. The content of RGO in RGO-PCF-s was about 11.9 %, and the hybrid material showed good dispersion stability in water. Besides, RGO-PCF-i, the insoluble part, with larger size, displayed excellent optical-limiting response, in which both nonlinear absorption and nonlinear scattering play important roles. As nitrogen-centered anions are an important type of intermediates in chemistry, this one-step "grafting-to" strategy could be used to obtain RGO-based materials with different applications.
机译：通过用GO处理从聚（9,9'-二己基芴咔唑）（PCF）生成的氮中心阴离子制备共价官能化的还原氧化石墨烯（RGO）片材。通过离心分离出具有不同化学行为的所得杂种。通过IR光谱，UV / Vis光谱，热重分析（TGA），拉曼光谱，TEM和SEM充分表征了共价修饰。发现可溶部分RGO-PCF-s被分成大小约200nm的小片状，并且疏水聚合物PCF在被RGO包裹后变为亲水性的。 RGO-PCF-s中RGO的含量约为11.9％，杂化材料在水中的分散稳定性良好。此外，不溶部分RGO-PCF-i具有较大的尺寸，表现出出色的光学限制响应，其中非线性吸收和非线性散射都起着重要的作用。由于以氮为中心的阴离子是化学中重要的中间体类型，因此这种一步“接枝”策略可用于获得具有不同应用的基于RGO的材料。

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