کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1630580 1516673 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and mesomorphic properties of fluorinated Schiff's base liquid crystals containing vinyl end groups
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and mesomorphic properties of fluorinated Schiff's base liquid crystals containing vinyl end groups
چکیده انگلیسی
Three kinds of fluorinated Schiff's base esters, 4-allyloxy-2-X-6-X-benzoic acid 4-[(2, 3, 4-trifluorophenylimino)-methyl]phenyl ester, where X=H or F, were synthesized and characterized. Their chemical structures were identified by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance (1H NMR). Their mesomorphic properties were studied by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). It was found that all the three compounds exhibited enantiotropic nematic phases only. And their clearing point temperature and thermal range of mesophase decreased with the number of fluorine atoms on the rigid core of the compounds; while their melting point temperature showed no distinct regularity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material - Volume 14, Issue 4, August 2007, Pages 373-377
نویسندگان
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