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Facile synthesis of porous organic polymers for the absorption of Pd(ii) ions and organic dyes

机译:用于吸收Pd(II)离子和有机染料的多孔有机聚合物的容易合成

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Porous organic polymers (POPs) were prepared via two-step reactions. In the first step, dialdehyde compounds were synthesized using the Suzuki–Miyaura coupling reaction, and in the second step, the dialdehyde compounds reacted with hydrazine hydrate to form polymers using Schiff’s base formation reactions. These POPs are nanosheet-layer structured, crystalline and fluorescent. They were studied using FTIR, fluorescence spectra, UV-Vis, SEM, TEM, XRD, DSC, and TGA. It was found that the pore parameters, such as specific surface areas and pore diameters, of the POPs could be adjusted by changing the reaction time and temperature. The specific surface areas increased with the increasing of reaction time and temperature. The maximum specific surface area could reach 715.6 m ~(2) g ~(?1) . Furthermore, the POPs could detect and remove Pd( II ) ions and organic dyes. When in contact with Pd( II ) ions, the fluorescence of the POPs was quenched, and the POPs could absorb Pd( II ) ions as well. The maximum absorption capacity for Pd( II ) ions could reach 20.6 mg g ~(?1) within 5 min. Meanwhile, the POPs could absorb two model dyes, rhodamine B (RhB) and methylene blue (MB), with high efficiency within 5 min.
机译:通过两步反应制备多孔有机聚合物(POPs)。在第一步中,使用Suzuki-Miyaura偶联反应合成二醛化合物,并在第二步中,二醛化合物与肼水合物反应以形成使用Schiff的基础形成反应的聚合物。这些POP是纳米片层结构,结晶和荧光。使用FTIR,荧光光谱,UV-VI,SEM,TEM,XRD,DSC和TGA进行研究。结果发现,通过改变反应时间和温度,可以调节孔隙参数,例如特异性表面积和孔径,可以通过改变反应时间和温度来调节。随着反应时间和温度的增加,比表面积增加。最大比表面积可以达到715.6 m〜(2)g〜(?1)。此外,POPs可以检测和去除Pd(II)离子和有机染料。当与Pd(II)离子接触时,淬灭弹性孔的荧光,并且POPs也可以吸收Pd(II)离子。 Pd(II)离子的最大吸收能力在5分钟内可达到20.6mg g〜(α1)。同时,POPS可以吸收两种模型染料,罗丹明B(RHB)和亚甲基蓝(MB),在5分钟内具有高效率。

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