The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Ordered Mesoporous Pd/Silica−Carbon as a Highly Active Heterogeneous Catalyst for Coupling Reaction of Chlorobenzene in Aqueous Media
Abstract
Heterogeneous palladium catalysts, which are supported on ordered mesoporous silica-carbon nanocomposites, have been applied in water-mediated coupling reactions of chlorobenzene without assistance of any phase-transfer catalysts. Characterization by XRD, TEM, N(2) sorption, FT-IR, TG, XPS, and H(2) chemisorption techniques reveals the highly ordered mesostructure, high surface areas (approximately 345 m(2)/g), large pore volumes (approximately 0.46 cm(3)/g), uniform mesopore sizes (approximately 6.3 nm), hybrid silicate and carbonaceous compositions, and a high dispersion of palladium nanoparticles (about 3 nm) in the mesopores. The catalyst exhibits a high yield for trans-stilbene (approximately 60%) in the Heck coupling reaction of chlorobenzene and styrene at 100 degrees C and for biphenyl (46%) in the Ullmann coupling reaction of chlorobenzene at 30 degrees C, using water as a solvent. When substituted aryl chlorides (hydroxyl, methoxyl, and methyl) are involved in the Ullmann reaction, the yields of symmetrical substituted biphenyl are also higher than 44% (this value reaches 86% for the coupling reaction of 4-chlorophenol) at a low temperature of 30 degrees C. This heterogeneous catalyst is stable, which shows negligible metal leaching, and can be reused more than 20 times. For comparison, the catalytic activities for Pd catalysts supported on pure mesoporous polymeric, carbonaceous, and silicate frameworks are also investigated. The results clearly indicate that the pore wall nature shows great influence on the dispersion of metallic Pd species and, in turn, the catalytic performance.
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Self-citationAryl−Aryl Bond Formation One Century after the Discovery of the Ullmann Reaction
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Cited by
Hierarchically porous materials: synthesis strategies and structure design
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Efficient, Selective, and Recyclable Palladium Catalysts in Carbon−Carbon Coupling Reactions
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Catalytic Organic Reactions in Water toward Sustainable Society
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Taking organic reactions over metal-organic frameworks as heterogeneous catalysis
Hu, M.-L., Safarifard, V., Doustkhah, E., Rostamnia, S., Morsali, A., Nouruzi, N., Beheshti, S., & Akhbari, K. (2018) · Microporous and Mesoporous Materials · doi:10.1016/j.micromeso.2017.07.057 · Cited by 283
Metadata
- Authors
- Wan, Y., Wang, H., Zhao, Q., Klingstedt, M., Terasaki, O., & Zhao, D.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-03-10
- Volume
- 131
- Issue
- 12
- Pages
- 4541-4550
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2092901484
- Cited by
- 351
- References
- 42
- FWCI
- 15.64
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wan, Y., Wang, H., Zhao, Q., Klingstedt, M., Terasaki, O., & Zhao, D. (2009). Ordered Mesoporous Pd/Silica−Carbon as a Highly Active Heterogeneous Catalyst for Coupling Reaction of Chlorobenzene in Aqueous Media. Journal of the American Chemical Society. https://doi.org/10.1021/ja808481g
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