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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents



  history
ID: 403290.0, Fritz-Haber-Institut / Inorganic Chemistry
High-surface-area TiO2 and TiN as catalysts for the C-C coupling of alcohols and ketones
Authors:Fischer, Anna; Makowski, Phiippe; Müller, Jens Oliver; Antonietti, Markus; Thomas, Arne; Goettmann, Frederic
Language:English
Research Context:Electron microscopic investigations on important catalytic systems
Date of Publication (YYYY-MM-DD):2008
Title of Journal:ChemSusChem
Volume:1
Issue / Number:5
Start Page:444
End Page:449
Copyright:© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:To design more sustainable processes for the alkylation of ketones, the use of both atom-ineffective leaving groups such as halides and boron as well as noble-metal-based catalysts should be avoided. For that purpose, high-surface-area titanium nitride was prepared from high-surface-area titanium dioxide using cyanamide as a transcription agent. The resulting nitride as well as the initial oxide proved to be effective and versatile catalysts for the alkylation of ketones with alcohols. Interestingly, the TiN catalyst yields unsaturated compounds, while the oxide-based catalyst mainly yields saturated coupling products. As a result of its metallic properties, TiN shows a strong tendency to catalyse the dehydrogenation of alcohols, which then undergo aldol condensation with ketones. In contrast, TiO2 promotes the direct nucleophilic attack of ketones on alcohols.
Free Keywords:C-C coupling; ceramics heterogeneous catalysis; mesoporous materials; titanium
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kolloid- und Grenzflächenforschung/Kolloidchemie/Nanostructured Functional Materials
Fritz-Haber-Institut/Inorganic Chemistry/Microstructure
External Affiliations:ICSM, Ctr Morcoule, Lab Nanomat Autoreparants, UMR 5257, F-30207 Bagnols Sur Ceze, France.
Identifiers:URL:http://dx.doi.org/10.1002/cssc.200800019 [only for subscriber]
ISSN:1864-5631
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