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Stabilizing Single Sites on Solid Supports: Robust Grafted Ti(IV)-Calixarene Olefin Epoxidation Catalysts via Surface Polymerization and Cross-Linking
| Content Provider | Semantic Scholar |
|---|---|
| Author | Guo, Yijun Solovyov, Andrew Grosso-Giordano, Nicolás A. Hwang, Son-Jong Katz, Alexander |
| Copyright Year | 2016 |
| Abstract | This manuscript develops a surface polymerization and cross-linking approach for the stabilization of single-site catalysts on solid surfaces, which is demonstrated here for grafted Ti(IV)-calixarene Lewis acids on silica. Our approach relies on cationic polymerization that is initiated by an adsorbed B(C6F5)3 and uses styrene as the monomer and diisopropenylbenzene as the cross-linking agent. The mildness of this polymerization method is demonstrated by its lack of blocking micropores and only slight consumption of mesopore internal surface area on the basis of N2 physisorption data at 77 K, both of which are in contrast to previously reported surface-polymerization approaches. Catalysis of samples before and after polymerization and cross-linking was investigated with a probe reaction consisting of the epoxidation of 1-octene with tert-butyl hydroperoxide as oxidant, which is known to be catalyzed by Lewis-acid sites, and a comparison of catalyst hydrolytic stability was performed. Added water in the la... |
| Starting Page | 7760 |
| Ending Page | 7768 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/acscatal.6b01998 |
| Alternate Webpage(s) | http://authors.library.caltech.edu/71341/2/cs6b01998_si_001.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/acscatal.6b01998 |
| Volume Number | 6 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
