solid state NMR

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Synthesis and Characterization of Hybrid Materials Consisting of n-octadecyltriethoxysilane by Using n-Hexadecylamine as Surfactant and Q0 and T0 Cross-Linkers

Journal Title, Volume, Page: 
Int. J. Mol. Sci. 2012, 13(5), 6279-6291; doi:10.3390/ijms13056279
Year of Publication: 
2012
Authors: 
Ismail Warad
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Omar Abd-Elkader H
Electron Microscope Unit, Zoology Department, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
Saud Al-Resayes
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Ahmad Husein
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammed Al-Nuri
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Ahmed Boshaala
Chemistry Department, Faculty of Science, Benghazi University, P. O. Box 1308, Benghazi, 22385, Libya
Nabil Al-Zaqri
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Taibi Ben Hadda
Materials Chemistry Laboratory, Faculty of Sciences, University of Mohammed Premier, Oujda-60000, Morocco
Preferred Abstract (Original): 
Novel hybrid xerogel materials were synthesized by a sol-gel procedure. n-octadecyltriethoxysilane was co-condensed with and without different cross-linkers using Q0 and T0 mono-functionalized organosilanes in the presence of n-hexadecylamine with different hydroxyl silica functional groups at the surface. These polymer networks have shown new properties, for example, a high degree of cross-linking and hydrolysis. Two different synthesis steps were carried out: simple self-assembly followed by sol-gel transition and precipitation of homogenous sols. Due to the lack of solubility of these materials, the compositions of the new materials were determined by infrared spectroscopy, 13C and 29Si CP/MAS NMR spectroscopy and scanning electron microscopy.
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Synthesis and Characterization of Novel Inorganic-Organic Hybrid Ru(II) Complexes and Their Application in Selective Hydrogenation

Journal Title, Volume, Page: 
Molecules
Year of Publication: 
2010
Authors: 
Ismail Warad
Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Zeid Al-Othman
Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
Saud Al-Resayes
Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
Salem S. Al-Deyab
Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
El-Refaie Kenawy
Petrochemical Research Chair, Department of Chemistry, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
Preferred Abstract (Original): 
Novel Ru(II) complex-based hybrid inorganic-organic materials immobilized via a diamine co-ligand site instead of the conventional diphosphine ligand have been prepared. The complexes were prepared by two different methods: sol-gel and surface modification techniques. The structures of the desired materials were deduced by several available physical measurements like elemental analyses, infrared, FAB-MS and 1H-, 13C- and 31P-NMR spectroscopy. Due to a lack of solubility the structures of xerogel 3 and modified 4 were studied by solid state 13C-, 29Si- and 31P-NMR spectroscopy, infrared spectroscopy and EXAFS. These materials were stable enough to serve as hydrogenation catalysts. Selective hydrogenation of functionalized carbonyls in a,b-unsaturated compounds was successfully carried out under mild conditions in a basic medium using these complexes as catalysts.
warad's picture

Synthesis and Characterization of Hybrid Materials Consisting of n-octadecyltriethoxysilane by Using n-Hexadecylamine as Surfactant and Q0 and T0 Cross-Linkers

Journal Title, Volume, Page: 
Int. J. Mol. Sci. 2012, 13(5), 6279-6291; doi:10.3390/ijms13056279
Year of Publication: 
2012
Authors: 
Ismail Warad
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Omar Abd-Elkader
Electron Microscope Unit, Zoology Department, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
Saud Al-Resayes
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Ahmad Husein
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammed Al-Nuri
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Ahmed Boshaala
Chemistry Department, Faculty of Science, Benghazi University, P. O. Box 1308, Benghazi, 22385, Libya
Nabil Al-Zaqri
Department of Chemistry, Science College, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Taibi Ben Hadda
Materials Chemistry Laboratory, Faculty of Sciences, University of Mohammed Premier, Oujda-60000, Morocco
Preferred Abstract (Original): 
Novel hybrid xerogel materials were synthesized by a sol-gel procedure. n-octadecyltriethoxysilane was co-condensed with and without different cross-linkers using Q0 and T0 mono-functionalized organosilanes in the presence of n-hexadecylamine with different hydroxyl silica functional groups at the surface. These polymer networks have shown new properties, for example, a high degree of cross-linking and hydrolysis. Two different synthesis steps were carried out: simple self-assembly followed by sol-gel transition and precipitation of homogenous sols. Due to the lack of solubility of these materials, the compositions of the new materials were determined by infrared spectroscopy, 13C and 29Si CP/MAS NMR spectroscopy and scanning electron microscopy.
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