کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1526806 995375 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Origin of templating processes in polypyrrole synthesis
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Origin of templating processes in polypyrrole synthesis
چکیده انگلیسی

The supermolecular mechanism of the template-mediated oxidative polymerization of pyrrole is investigated in detail. It is shown for the first time that 2,5-bis(pyrrol-2-yl)pyrrolidyl complexes with aromatic sulfonic acids such as β-naphtalenesulfonic acid or para-toluenesulfonic acid are formed in the early polymerization step. The crystalline acid–base complexes are isolated and their crystal structures are analyzed. A 2,5-bis(pyrrol-2-yl)pyrrolidyl cation is common to both complexes and forms an inner salt with the sulfonic acid anion. As concluded from NMR investigations the synthesis using sulfonic acids results in a high stereo selectivity with respect to the trans conformation of the pyrrolidyl ring compared with the classical synthesis routine of this compound using hydrochloric acid. The needle-like crystals of the complexes act as hard templates during the next step of the polymerization and result in tubular morphologies of the polypyrrole.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 112, Issue 1, 15 November 2008, Pages 154–161
نویسندگان
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