A versatile synthetic approach was applied to synthesize a polyviologen (PV.nBr) polymer via step-growth polymerization of a tetraethylene glycol-linked trinapthyl-based dihydrazide with a bipyridinium-based dialdehyde (BIPY.2Br DA) in water under acidic conditions (pH, 2–3). The polymeric structure was constructed from alternating units of π-electron rich naphthyl and π-electron deficient bipyridinium (BIPY) moieties linked together via covalent acylhydrazone bonds. Ultraviolet-visible (UV–Vis) absorption analysis confirmed the occurrence of intramolecular donor-acceptor charge transfer (DA-CT) interactions between the electron donor and acceptor units. The synthesized polymer was subjected to lyophilization in order to produce a sponge-like aerogel with a large surface area and high porosity. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterization revealed that the polymer possessed a uniform sheet-like morphology in the solid state following lyophilization. The ability of the novel polymer to adsorb Reactive Orange 122 (RO122) dye from synthetic wastewater was investigated at different operational conditions and was determined to follow pseudo-first-order kinetics. The results indicated that the novel PV.nBr can efficiently and rapidly remove RO122 under a wide range of solution pH with up to 97% uptake. The novel PV.nBr aerogel adsorbed RO122 by electrostatic attractions between the BIPY dication groups of the polymer and the anionic sulphonate groups of RO122. Adsorption isotherms revealed that the data was best fit to the Dubinin-Radushkevich model, with a calculated mean free energy of adsorption of 2.04 kJ/mol, corresponding to a physisorption dominated process.

通过在水中在酸性条件下（pH ）通过四乙二醇连接的三萘基二酰肼与联吡啶基二醛（BIPY.2Br DA）的逐步增长聚合反应，采用一种通用的合成方法来合成聚紫罗兰色（PV.nBr）聚合物。，2–3）。聚合物结构是由π电子富集的萘基和π电子缺乏的联吡啶（BIPY）部分的交替单元通过共价酰基hydr键。紫外线-可见（UV-Vis）吸收分析证实了电子供体和受体单元之间分子内供体-受体电荷转移（DA-CT）相互作用的发生。冻干合成的聚合物以产生具有大表面积和高孔隙率的海绵状气凝胶。扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征表明，冻干后该聚合物在固态下具有均匀的片状形态。在不同的操作条件下研究了这种新型聚合物从合成废水中吸附活性橙122（RO122）染料的能力，并确定其遵循拟一级动力学。结果表明，新型PV。nBr可以在宽范围的溶液pH值下高效快速地去除RO122，吸收率高达97％。新型PV.nBr气凝胶通过聚合物的BIPY阳离子基团和RO122的阴离子磺酸盐基团之间的静电吸引作用吸附RO122。吸附等温线表明，该数据最适合于Dubinin-Radushkevich模型，计算出的平均吸附自由能为2.04 kJ / mol，对应于以物理吸附为主的过程。