کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1442360 | 1509440 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of poly[(R)-(â) and (S)-(+)-3-(1â²-pyrrolyl)propyl-N-(3â³,5â³-dinitrobenzoyl)-α-phenylglycinate]s as chiral oligomers of pyrrole
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and characterization of poly[(R)-(â) and (S)-(+)-3-(1â²-pyrrolyl)propyl-N-(3â³,5â³-dinitrobenzoyl)-α-phenylglycinate]s as chiral oligomers of pyrrole Synthesis and characterization of poly[(R)-(â) and (S)-(+)-3-(1â²-pyrrolyl)propyl-N-(3â³,5â³-dinitrobenzoyl)-α-phenylglycinate]s as chiral oligomers of pyrrole](/preview/png/1442360.png)
چکیده انگلیسی
Chiral polypyrrole oligomers were prepared from (R)-(â) (1) and (S)-(+)-3-(1â²-pyrrolyl)propyl-N-(3â³,5â³-dinitrobenzoyl)-α-phenylglycinate (2) by oxidative polymerization in the presence of FeCl3 as an oxidant. The new polymers were characterized by 1H NMR, FTIR and UV-vis (λmáx = 251 nm). TGA analyses of the corresponding polymers, poly1 and poly2, demonstrate an excellent thermal stability up to 204 °C, followed by two consecutive weight losses at higher temperatures. Relative number-average molecular weights of about 1.4 Ã 103 and 2.3 Ã 103, for poly1 and poly2, respectively, were measured by SEC, corresponding to oligomeric chains. Specific optical rotation measurements (c 0.1, THF) for poly1 [α]D20 = â44 and poly2 ([α]D20 = +44) suggest that chirality is retained during the polymerization. Transversal section analysis of SEM images indicates the materials isolated right after the synthesis is highly porous.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 160, Issues 17â18, September 2010, Pages 1920-1924
Journal: Synthetic Metals - Volume 160, Issues 17â18, September 2010, Pages 1920-1924
نویسندگان
João Carlos Ramos, Jéssica M. Monteiro Dias, Rosa M. Souto-Maior, Adriana S. Ribeiro, Josealdo Tonholo, Valessa Barbier, Jacques Penelle, Marcelo Navarro,