کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1441554 988094 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Copolymers of pyrrole with N-alkynylpyrroles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Copolymers of pyrrole with N-alkynylpyrroles
چکیده انگلیسی

Electrochemical oxidative copolymerization was carried out between pyrrole and N-substituted pyrroles, Pr(CCPh) (Ph = phenyl) and Pr(CCSiEt3), which have CCPh and CCSiEt3 groups, respectively, at the N-position of pyrrole. The electrochemical oxidation of Pr(CCPh) and Pr(CCSiEt3) required potentials about 0.5–0.8 V higher than that of pyrrole because of the presence of the electron-pulling acetylenic group, and the electrochemical copolymerization gave copolymers with pyrrole-rich compositions. Copolymers of pyrrole with Pr(CCPh) showed an electrical conductivity of 2–6.3 S cm−1. These copolymers showed thermal stability: 50–85 °C higher than the homopolymer of pyrrole. A dimeric compound of Pr(CCPh), i.e., (PrCCPh)2, was prepared, and its X-ray crystallographic analysis essentially revealed a pyrrole–pyrrole coplanar structure; this supports the notion that the CCPh group attached at the N-position of pyrrole does not break π-conjugation in the polypyrrole main chain of the copolymer.

Figure optionsDownload as PowerPoint slideHighlights
► Electrochemical copolymerization of pyrrole with N-alkynylpyrroles.
► The copolymers showed considerably higher thermal stability than polypyrrole.
► Synthesis of N-alkynylpyrroles and a dimer.
► X-ray molecular structures of the N-alkynylpyrroles and dimer.
► Optical and electrochemical data of the N-alkynylpyrroles and dimer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 162, Issue 24, 31 December 2012, Pages 2406–2413
نویسندگان
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