Mn(Salen)Cl complexes immobilized on SBA-15 functionalized with amine as an efficient, selective and recyclable catalyst for benzyl alcohol oxidation by TBHP: the effects of Mn loading and reaction conditions

Mn(Salen)Cl complexes immobilized on SBA-15 functionalized with amine as an efficient, selective... In this work, SBA-15 molecular sieves were functionalized with propylamine. A series of Mn(Salen)Cl complexes immobilized on amine functionalized SBA-15 (SBA-15-pr-NH2) with different loading of Mn in range of 0.293–0.765 mmol Mn/g catalyst were prepared. These samples were characterized by BET, XRD, TGA–DSC, UV–Vis and FT-IR. The catalytic activity of immobilized Mn(Salen)Cl complexes was evaluated in the oxidation of benzyl alcohol in the liquid phase using tert-butylhydroperoxide (TBHP) as the oxidant. It was found that Mn(Salen) complexes immobilized on the SBA-15-pr-NH2 are an efficient catalyst for the oxidation of benzyl alcohol and showed high catalytic activity and selectivity to benzaldehyde. As we expected, the leaching of manganese complexes from the support during the reaction was negligible, because of strong interaction between Mn(Salen)Cl complexes and the amine groups on the surface. The effects of Mn loading and various solvents on the conversion and selectivity were studied. A second order function for the variation in catalytic activity with respect to the loading of Mn(Salen)Cl in different catalyst samples was observed. The activity of the SBA-15-pr-Mn(Salen)Cl catalyst differs with the type of the solvent, and, in this case, acetonitrile gives the best conversion results. The influences of reaction temperature, reaction time, solvent, reusability, amount of catalyst and TBHP to benzyl alcohol molar ratio were investigated. Under optimized conditions, 73.5 % conversion of benzyl alcohol and 100 % selectivity to benzaldehyde was achieved. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Mn(Salen)Cl complexes immobilized on SBA-15 functionalized with amine as an efficient, selective and recyclable catalyst for benzyl alcohol oxidation by TBHP: the effects of Mn loading and reaction conditions

Loading next page...
 
/lp/springer_journal/mn-salen-cl-complexes-immobilized-on-sba-15-functionalized-with-amine-0cqfBo9r0M
Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-015-1937-1
Publisher site
See Article on Publisher Site

Abstract

In this work, SBA-15 molecular sieves were functionalized with propylamine. A series of Mn(Salen)Cl complexes immobilized on amine functionalized SBA-15 (SBA-15-pr-NH2) with different loading of Mn in range of 0.293–0.765 mmol Mn/g catalyst were prepared. These samples were characterized by BET, XRD, TGA–DSC, UV–Vis and FT-IR. The catalytic activity of immobilized Mn(Salen)Cl complexes was evaluated in the oxidation of benzyl alcohol in the liquid phase using tert-butylhydroperoxide (TBHP) as the oxidant. It was found that Mn(Salen) complexes immobilized on the SBA-15-pr-NH2 are an efficient catalyst for the oxidation of benzyl alcohol and showed high catalytic activity and selectivity to benzaldehyde. As we expected, the leaching of manganese complexes from the support during the reaction was negligible, because of strong interaction between Mn(Salen)Cl complexes and the amine groups on the surface. The effects of Mn loading and various solvents on the conversion and selectivity were studied. A second order function for the variation in catalytic activity with respect to the loading of Mn(Salen)Cl in different catalyst samples was observed. The activity of the SBA-15-pr-Mn(Salen)Cl catalyst differs with the type of the solvent, and, in this case, acetonitrile gives the best conversion results. The influences of reaction temperature, reaction time, solvent, reusability, amount of catalyst and TBHP to benzyl alcohol molar ratio were investigated. Under optimized conditions, 73.5 % conversion of benzyl alcohol and 100 % selectivity to benzaldehyde was achieved.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Feb 15, 2015

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off