کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
177581 | 458990 | 2010 | 10 صفحه PDF | دانلود رایگان |
Two series of dicyanovinyl-substituted compounds namely 2-aryl-5-dicyanovinylthiophenes and 5-aryl-5′-dicyanovinyl-2,2′-bithiophenes were synthesized through Knoevenagel condensation of the corresponding 2-aryl-5-formyl-thiophenes and 5-aryl-5′-formyl-2,2′-bithiophene precursors. In contrast, the 2-aryl-5-formyl-thiophenes precursor were prepared through the Vilsmeier–Haack–Arnold reaction starting from inexpensive and easily available precursors such as acetophenones; this method produced the title compounds in higher yield than that recently reported which involved the Suzuki coupling of functionalized aryl boronic acids with 5-bromo-2-formyl-thiophene. Electrochemical studies and characterization of both the linear and non-linear optical properties and thermal properties indicated that good non-linearity was complemented by exceptional thermal stability for some chromophores, making them potential candidates for several optoelectronic applications such as solvatochromic probes and non-linear optical materials.
Journal: Dyes and Pigments - Volume 86, Issue 3, August 2010, Pages 217–226