کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5182856 1381001 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of electron-withdrawing side chain modifications on the optical properties of thiophene-quinoxaline acceptor based polymers
ترجمه فارسی عنوان
اثر تغییرات زنجیره جانبی حذف الکترون در خواص اپتیکی پلیمرهای مبتنی بر گیرنده تیوفن آکا
کلمات کلیدی
پلیمرهای کنجد اصلاح زنجیره جانبی، مهندسی سطح انرژی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

Four new thiophene-quinoxaline acceptor based polymers have been synthesized. The parent thiophene-quinoxaline acceptor based copolymer was modified by introducing different electron-withdrawing groups adjacent to the thiophene side group. The effect on the physical, electrochemical and optical properties of the polymer series is discussed with respect to the parent thiophene-quinoxaline acceptor based polymer. The side chain carbonyl from one modified monomer could conveniently be transformed to either a difluoromethylene or an -ylidene malononitrile group via carbonyl transformations. For all polymers incorporating an electron-withdrawing side group both the HOMO and especially the LUMO were significantly shifted away from vacuum while all exhibit enhanced light harvesting ability. Especially the incorporation of an -ylidine malononitrile side group increases both the spectral coverage and absorption coefficient. Incorporation of a difluoromethylene side group resulted in a twofold increase of the molecular weight compared to the parent polymer structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 54, Issue 4, 18 February 2013, Pages 1285-1288
نویسندگان
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