کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9617550 | 49164 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grafting of the η5-CpMo(CO)3 moiety on pure and surface modified SBA-15 molecular sieves
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Grafting of the η5-CpMo(CO)3 moiety on pure and surface modified SBA-15 molecular sieves Grafting of the η5-CpMo(CO)3 moiety on pure and surface modified SBA-15 molecular sieves](/preview/png/9617550.png)
چکیده انگلیسی
The η5-CpMo(CO)3 moiety is grafted directly or with an aromatic-iodosilane linker on SBA-15 (SBA-15DG and SBA-15ASG) surfaces. The appearance of strong IR bands around 2016 and 1956 cmâ1 on the grafted samples demonstrate the presence of carbonyl groups and evidence the successful grafting of the η5-CpMo(CO)3 moiety. Elemental analyses reveal 1.5 and 4.9 wt.% Mo on the SBA-15DG and SBA-15ASG samples, respectively. The XRD analyses, N2 adsorption-desorption curves, and TEM analyses provide strong evidence that the mesoporous structures of the supporting materials retain their long range ordering throughout the grafting process, despite significant reductions of the surface areas, pore volumes and pore sizes. The modified materials are found to be active for the catalytic epoxidation of cyclooctene. The catalytic activity of the SBA-15ASG sample remains largely unchanged throughout several recycling experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 86, Issues 1â3, 28 November 2005, Pages 341-348
Journal: Microporous and Mesoporous Materials - Volume 86, Issues 1â3, 28 November 2005, Pages 341-348
نویسندگان
Ayyamperumal Sakthivel, Jin Zhao, Fritz E. Kühn,