کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5491952 | 1525130 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alternating current conductivity and dielectrical properties of -5-sulfono-7-(4-x phenyl azo)-8-hydroxy quinoline derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The influence of NO2, CH3 and Cl substitutions on structure, dielectric constants and alternating current conductivity, Ïac, of -5-sulfono-7-(4-x phenyl azo)-8-hydroxy quinoline (SAHQ) ligands is investigated in the frequency range 1-100Â kHz and in the temperature range 200-373Â K. SAHQ-x; x = -NO2 or -CH3 or -Cl ligands have monoclinic crystal system with different lattice parameters and crystallite size depending on the substitutions. The thermal behavior of SAHQ-x depends on the substitution. The AC electrical conduction mechanism for (SAHQ- NO2) and (SAHQ- Cl) ligands are found to follow the correlated barrier hopping model (CBH). The parameters such as barrier height, hopping distance, density of states near Fermi level and relaxation time have been reported. Overlapping large polaron tunneling model has been applied for explaining conduction behavior of SAHQ-CH3 ligand. The hopping energy and the polaron radius have been determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 519, 15 August 2017, Pages 76-81
Journal: Physica B: Condensed Matter - Volume 519, 15 August 2017, Pages 76-81
نویسندگان
H.M. Zeyada, N.A. El-Ghamaz, Eman A. Gaml,