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بین المللی علوم (منتشر نمی شود)
مقاله 4، دوره 5، شماره 0 - شماره پیاپی 1371، اردیبهشت 1383 اصل مقاله (279.93 K)
نویسندگان
Alireza Badiei؛ FatemehTousi؛ Ghodsi Mohammadi Ziarani؛ Parviz Norouzi^*
عنوان مقاله [English]
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چکیده [English]
The amount of cobalt (III) ions introduced into the mesopores has been controlled by the concentration of the cobalt complex in the exchange solution and the existing percentage of silanolate on the surface. The obtained FTIR results show that a part of surfactants retain in the channel during the ion exchange in absolute and dry ethanol. The colour change during this process indicates that cobalt undergoes substitution reactions within its coordination sphere. UV-visible characterization, consistent with previous study of EXAFS spectroscopy confirms this evolution providing a full description of the complex. Several steps were identified for direct ion exchanged reaction that is include electrostatic adsorption of complex into the channel, formation of ion pair with macro-counter ion MTS, and grafting step with substitution reaction of macro-ligand MTS by formation of Co-O-Si bridge
کلیدواژه‌ها [English]
Cobaltcomplex, FTIR, Ionexchange, mesoporous compound, Modified-MTS, UV.vis

آمار تعداد مشاهده مقاله: 950 تعداد دریافت فایل اصل مقاله: 2,482

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