کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7810573 | 1501765 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure-directed functional properties of symmetrical and unsymmetrical Br-substituted Schiff-bases
ترجمه فارسی عنوان
خواص کارکردی ساختاری-متشکل از شیف-های پایه متقارن و نامتقارن
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کلمات کلیدی
پایه های شیف ساختارهای اشعه ایکس، بسته بندی کریستال، اثرات الکترونیکی القایی، الکتروشیمی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
This study deals with the investigation of two low molecular weight Schiff base compounds with bromine end groups, differing only by the presence or absence of one methyl group, with the aim of better understanding the solution and the solid state optical, electrochemical and thermic properties generated by the small structural features. The compounds were structurally characterized by 1H NMR, 13C NMR and FTIR spectroscopies, single-crystal X-ray diffraction and gas chromatography analysis. Their thermal behavior was evidenced by polarized light microscopy and differential scanning calorimetry. The single crystal structure of the compounds reveals the versatility of bromine substituents which can adopt an attractive or repulsive electron effect, driven by the structural environment. A comparison of the structures shows that the introduction of a methyl unit as a bulky group hinders completely the Ï-Ï stacking interaction within the structural rows, inducing larger intermolecular distances resulting in quite different functional physical and chemical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1049, 8 October 2013, Pages 377-385
Journal: Journal of Molecular Structure - Volume 1049, 8 October 2013, Pages 377-385
نویسندگان
Luminita Marin, Valeria Harabagiu, Arie van der Lee, Adina Arvinte, Mihail Barboiu,