Titania nanoparticles stabilized HPA in SBA-15 for the intermolecular hydroamination of activated olefins

Sawant-Dhuri, Dhanashri, Balasubramanian, Veerappan V., Ariga, Katsuhiko, Park, Dae-Hwan, Choy, Jin-Ho, Cha, Wang Soo, Al-deyab, Salem S., Halligudi, Shivappa B. and Vinu, Ajayan (2014) Titania nanoparticles stabilized HPA in SBA-15 for the intermolecular hydroamination of activated olefins. ChemCatChem, 6 12: 3347-3354. doi:10.1002/cctc.201402449


Author Sawant-Dhuri, Dhanashri
Balasubramanian, Veerappan V.
Ariga, Katsuhiko
Park, Dae-Hwan
Choy, Jin-Ho
Cha, Wang Soo
Al-deyab, Salem S.
Halligudi, Shivappa B.
Vinu, Ajayan
Title Titania nanoparticles stabilized HPA in SBA-15 for the intermolecular hydroamination of activated olefins
Journal name ChemCatChem   Check publisher's open access policy
ISSN 1867-3880
1867-3899
Publication date 2014-09-01
Year available 2014
Sub-type Article (original research)
DOI 10.1002/cctc.201402449
Open Access Status
Volume 6
Issue 12
Start page 3347
End page 3354
Total pages 8
Place of publication Weinheim, Germany
Publisher Wiley
Collection year 2015
Language eng
Formatted abstract
A liquid phase hydroamination (HA) of α,β-ethylenic compounds with amines was investigated with TiO2 nanoparticles stabilized 12-tungstophosphoric acid (TPA) in SBA-15. The catalysts were prepared by wet impregnation of TPA/TiO2 nanoparticles into the SBA-15 and calcined at different temperatures. The characterization results reveal that the textural properties and the acidity of the prepared catalysts can be finely controlled with the simple adjustment of the calcination temperature and the structure of the support, decorated with the TiO2 and TPA nanoparticles, was intact even after the modification. The prepared catalysts were investigated for HA of ethyl acrylate with different aromatic and aliphatic amines over a wide range of reaction conditions to optimize the yield and the selectivity of product. It was found that this process is 100% atom efficient and the catalytic performance depended significantly on the loading of TPA over the catalyst and the calcination temperature. Under optimized reaction conditions, the best catalyst, 15 wt %TPA/22.4wt%TiO2/SBA-15 calcined at 1123K, offered the highest conversion of p-ethylaniline (70%) with 100% chemo-selectivity to the anti-Markovnikov product, i.e., the mono-addition product. The reaction was heterogeneously catalyzed and no contribution from leached TPA into the reaction was observed.
Keyword Heteropoly acids
Hydroamination
Mesoporous materials
Nanocatalysts
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 1 September 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Institute for Molecular Bioscience - Publications
 
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