کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1443671 | 1509474 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and chemical properties of new soluble aromatic polyketones with cross π-conjugated systems
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
چکیده انگلیسی
New phosphorescent aromatic polyketones with a 9,9-dioctylfluorene copolymerizing unit (; Ar = p-phenylene (Polymer 1) or pyridine-2,5-diyl (Polymer 2); Flu = 9,9-dioctylfluorene-2,7-diyl) were prepared by organometallic polycondensation. Chemical properties of the polymers support a notion that the polymer has an expanded π-conjugated system through the cross π-conjugated –Ar–CO–Ar– unit. Polymer 1 was photoluminescent with an emission peak at about 430 nm and quantum yields of 10 and 21% at room temperature (r.t.) and 77 K, respectively. The light emission from Polymer 1 showed features of phosphorescence with long decay lifetimes of 0.22 and 0.53 s at r.t. and 77 K, respectively. Polymer 2 behaved similarly in light emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 156, Issues 21–24, 1 December 2006, Pages 1390–1395
Journal: Synthetic Metals - Volume 156, Issues 21–24, 1 December 2006, Pages 1390–1395
نویسندگان
Masahiro Abe, Takakazu Yamamoto,