Highly active and selective catalysts for olefin hydrosilylation reactions using metalloporphyrins intercalated in natural clays (DOI: 10.1039/c5re00010f )
- نوع المنشور
- بحث أصيل
- المؤلفون
- Waheed Jondi
- Ahed Zyoud
- Ahmad Qasem Hussein
- Hikmat S. Hilal
- waseem mansour
- النص الكامل
- تحميل
TetraIJ4-pyridyl)porphyrinato-manganeseIJIII)(MnTPyP
+
) ions intercalated inside nano- and micro-size natural
clay powders effectively catalyzed the hydrosilylation reaction of 1-octene and triIJethoxy)silane under
mild conditions. The results showed that the homogeneous MnTPyP
+
ions catalyzed the reaction where
both branched and linear products were observed. Intercalation significantly enhanced both catalyst activity
and selectivity. Production of the linear triIJethoxy)silyl-1-octane as sole product was confirmed by FT-IR
and NMR spectra, in the case of the intercalated catalyst. The activity enhancement was more pronounced
in the case of the nano-particle supported catalyst system, with turnover frequency (TF) values up to 1200
min
−1
and 85% conversion observed in less than 20 min. The intercalated catalyst systems were easy to
recover and were reused three times, while retaining up to 80% of their original activity. Effects of different
reaction parameters on the initial reaction rate, such as clay particle size, solvent polarity, reactant concentration,
catalyst loading and temperature, were investigated. A new plausible mechanism, with evidence
and justifications, is proposed.
المجلة
- العنوان
- Reaction Chemistry and Engineering-Royal Chemical Society- 1 (2016) 194-203
- الناشر
- --
- بلد الناشر
- فلسطين
- نوع المنشور
- Both (Printed and Online)
- المجلد
- --
- السنة
- 2016
- الصفحات
- --