Amine-Triggered Dopamine Polymerization: From Aqueous Solution to Organic Solvents
Amine-Triggered Dopamine Polymerization: From Aqueous Solution to Organic Solvents
复制标题
胺引发的多巴胺聚合：从水溶液到有机溶剂
DOI：
10.1002/marc.201800160
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发表时间：
2018-06-01
影响因子：
4.6
通讯作者：
Jia, Xin
中科院分区：
文献类型：
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作者：
Liu, Xinghuan;Kang, Junjie;Jia, Xin
多巴胺（DA）聚合在许多领域受到了极大的关注，然而，几乎所有的研究都局限于水溶液，阻碍了它的广泛应用。本文报道了胺类化合物在水或有机溶剂中通过捕获盐酸DA及其中间体中的H+来引发DA聚合，从而加速自由基的生成。胺类物质浓度的增加和pKb的减少导致反应平衡向产物聚多巴胺（PDA）转移。以水溶性易去除的Na2SO4纳米线和NaCl立方体为模板，在乙醇溶液中采用DA聚合法制备了不同形态的中空PDA结构。在900℃下获得了PDA纳米管（PDNC-900）的碳化产物，并在氧还原反应中表现出与Pt/C相当的电化学活性。
Dopamine (DA) polymerization has received significant attention in many fields, however, almost all of the works are limited to aqueous solution and hamper its wide application. This paper reports that amines can trigger DA polymerization by capturing the H+ from DA hydrochloride and intermediates to accelerate the generation of radical species in water or organic solvents. Increasing concentration and decreasing pKb of amines cause the reaction equilibrium to shift toward the product polydopamine (PDA). Water-soluble and easily-removable Na2SO4 nanowires and NaCl cubes can be used as templates to prepare different morphologies of hollow PDA structures by DA polymerization in ethanol solution. The carbonization production of PDA nanotubes at 900 degrees C (PDNC-900) is obtained and demonstrates electrochemical activity in the oxygen reduction reaction that is comparable to that of Pt/C.