کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5190220 | 1381201 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of poly(3,3â²-dialkynyl-2,2â²-bithiophene-5,5â²-diyl) with high coplanarity and effective Ï-conjugation system
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New head-to-head type polythiophenes with acetylenic -CCR side groups, HH-P3(CCR)Th (R=n-C10H21, n-C6H13, n-C4H9), were prepared by palladium-catalyzed polycondensation of the corresponding dibromo-monomers by using Me3SnSnMe3 as the polycondensing agent. The single crystal structure of the monomer revealed high coplanarity of the bithiophene unit, and the derived polymer showed a UV-vis absorption peak at approximately 520 nm. The λmax position was red-shifted from those of regioregular poly(3-alkylthiophene)s (385 and 430 nm for HH- and HT-type polymers, respectively). These data indicate that the newly synthesized polythiophene with the -CCR group has a highly coplanar structure with a large effective Ï-conjugation system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 37-41
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 37-41
نویسندگان
Takao Sato, Zhengguo Cai, Takeshi Shiono, Takakazu Yamamoto,