کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5221650 | 1383427 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Columnar mesomorphism of bent-rod mesogens containing 1,2,4-oxadiazole rings
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Columnar mesomorphism of bent-rod mesogens containing 1,2,4-oxadiazole rings Columnar mesomorphism of bent-rod mesogens containing 1,2,4-oxadiazole rings](/preview/png/5221650.png)
چکیده انگلیسی
In this study, the synthesis, characterization, and mesomorphic properties of ten new bent-rod compounds containing two units of 1,2,4-oxadiazoles are reported. In order to understand the relationship between the structure and the mesomorphic behavior, molecules containing a variety of polar substituents (i.e., I, NO2, NH2, OH) on the central rigid core were prepared. The hexagonal columnar mesomorphism was characterized by DSC and POM and the nature of the mesophases was established through XRD studies. The driving force for self-assembly can be explained by microsegregation between the aliphatic parts and the polar parts, producing a dimer, trimer, and tetramer inside a single disc.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron - Volume 67, Issue 49, 9 December 2011, Pages 9491-9499
Journal: Tetrahedron - Volume 67, Issue 49, 9 December 2011, Pages 9491-9499
نویسندگان
Hugo Gallardo, Marli Ferreira, André A. Vieira, Eduard Westphal, Fernando Molin, Juliana Eccher, Ivan H. Bechtold,