کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5188044 | 1381144 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of 2-D and 3-D covalent networks derived from triazine central cores and bridging aromatic diamines
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Nucleophilic substitutions of the reactive chlorine atoms in either cyanuric or phosphonitrilic chloride by the bridging 1,4-phenylenediamine and benzidine units lead to the formation of two- (2-D) or three-dimensional (3-D) covalent networks, according to the spatial arrangement of the chlorine atoms in each particular triazine core. The materials are electrochemically active and stable, and exhibit interesting optical properties. The UV-visible spectral absorptions are significantly red-shifted and can been altered upon chemical oxidation. Furthermore, a three-band absorption spectrum typical of polaronic nature is observed in the case of the layered benzidine/cyanuric chloride network. Either spherical (2-D) or cubic (3-D) morphologies were revealed by SEM analysis, while the XRD patterns indicated partial crystallinity. Due to the inherited ion-exchange properties of the 2-D and 3-D ionic networks, the materials can be regarded as the organic analogues of conventional inorganic layered or zeolitic ion-exchangers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 49, Issue 5, 3 March 2008, Pages 1137-1144
Journal: Polymer - Volume 49, Issue 5, 3 March 2008, Pages 1137-1144
نویسندگان
Panagiotis Dallas, Athanasios B. Bourlinos, Dimitrios Petridis, Nicholaos Boukos, Kyriaki Papadokostaki, Dimitrios Niarchos, Nicholaos Guskos,