کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
62607 47647 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization, and catalytic activity of anionic iron(III) porphyrins intercalated into layered double hydroxides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Synthesis, characterization, and catalytic activity of anionic iron(III) porphyrins intercalated into layered double hydroxides
چکیده انگلیسی

The first generation free-base anionic porphyrin [H2(TSPP)]4−, its iron(III) porphyrin [Fe(TSPP)]3−, and the second generation anionic complexes [Fe(TDFSPP)]3− and [Fe(TDCSPP)]3− were intercalated into the layered double hydroxide ZnnAl-LDH (n=2n=2, 4 or 5) by coprecipitation at constant pH. The materials were characterized by X-ray powder diffraction, UV/visible spectroscopy in glycerin mull, attenuated total reflectance Fourier transform infrared spectroscopy, and electron paramagnetic resonance. Results revealed that the coprecipitation method led to intercalation of the free-base porphyrin and the iron(III) porphyrins between the ZnnAl-LDH layers. The materials were used as catalysts in the oxidation of cyclooctene, cyclohexene, and cyclohexane by iodosylbenzene. The catalytic activity of [Fe(TDCSPP)]-Zn2Al-LDH was higher than that of the homogeneous [Fe(TDCSPP)]3−, but the opposite effect was observed in the case of [Fe(TDFSPP)]-Zn2Al-LDH. Although [Fe(TDFSPP)]3− and [Fe(TDCSPP)]3− are structurally similar, their intercalation into Zn2Al-LDH likely results in different chemical environments, leading to distinct catalytic activities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 257, Issue 2, 25 July 2008, Pages 233–243
نویسندگان
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