Recently, one paper titled as “Azo dye aggregates and their roles in the morphology and conductivity of polypyrrole” by Yu Li et al. was published in Dyes and Pigments, the first author of the paper is Dr. Yu Li. (Link to 10.1016/j.dyepig.2020.108329)

    Polypyrrole (PPy) synthesized by the oxidation of pyrrole with iron (III) chloride in the presence of sulfonic azo dyes exhibits fascinating nanometer-scale morphology and high conductivity, which are distinctly different from their counterparts prepared without dyes. The present work systematically studied the roles of sulfonic azo dye aggregates formed in acidic medium during the growth of PPy based on structural and elemental analysis. The results showed that there are two processes that affect the formation of PPy micro/nanostructures: (1) the oxidation of pyrrole to PPy and (2) precipitation of dye-containing aggregates. The morphology of PPy thus will depend on how fast the processes are and in what succession they take place.

==================================================================================================================================

     日前，李瑜博士(第一作者)的论文发表在Elsevier出版的学术期刊Dyes and Pigments上，论文题目为“Azo dye aggregates and their roles in the morphology and conductivity of polypyrrole”。  

  在磺酸偶氮染料存在的条件下，吡咯经氯化铁（III）氧化聚合形成的聚吡咯（PPy）具有均匀规则的微/纳米尺度形貌并且表现出优异的导电性，而传统的吡咯聚合体系中形成的PPy并不具备这些优势。该项工作详细考察了磺酸偶氮染料在酸性介质中形成聚集体的结构和微观形貌，探讨了染料对化学氧化聚合过程中聚吡咯自组装行为的影响，指出染料聚集体的形成与吡咯聚合的速率以及二者发生的先后顺序决定着聚吡咯的形貌。论文工作将为聚吡咯的微/纳米尺度形貌调控和电导率优化提供重要参考。