Issue 98, 2014
From the journal:

RSC Advances

Combustion synthesized La2O3 and La(OH)3: recyclable catalytic activity towards Knoevenagel and Hantzsch reactions†

Bhanu P. Gangwar,‡a   Veerabhadraiah Palakollu,‡a   Archana Singh,a   Sriram Kanvah*a  and  Sudhanshu Sharma*a  

* Corresponding authors

a Department of Chemistry, Indian Institute of Technology, Gandhinagar, Chandkheda, Ahmedabad, Gujarat-382424, India
E-mail: ssharma@iitgn.ac.in, kanvah@gmail.com
Fax: +91 79 2397 2324, 2397 2583
Tel: +91 97277696682

Abstract

Combustion synthesized La2O3 and subsequently produced La(OH)3 are characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and Brunauer–Emmitt–Teller (BET) methods. The basicity of La2O3 and La(OH)3 is utilized for Knoevenagel and Hantzsch reactions. Reaction of aldehydes with suitable substrates containing active methylene groups led to Knoevenagel and Hantzsch products in good to excellent yields in organic solvents, water and under dry or solvent free conditions. Catalytic activity remains unchanged even after multiple (nine) cycles. Detailed mechanistic investigation using the simple adsorption reveals the prevalence of Eley–Rideal type adsorption where only one of the reactants is adsorbed for the reaction.

Graphical abstract: Combustion synthesized La2O3 and La(OH)3: recyclable catalytic activity towards Knoevenagel and Hantzsch reactions

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C4RA08353A
Article type
Paper
Submitted
08 Aug 2014
Accepted
15 Oct 2014
First published
15 Oct 2014

RSC Adv., 2014,4, 55407-55416

Permissions

Request permissions

Combustion synthesized La2O3 and La(OH)3: recyclable catalytic activity towards Knoevenagel and Hantzsch reactions

B. P. Gangwar, V. Palakollu, A. Singh, S. Kanvah and S. Sharma, RSC Adv., 2014, 4, 55407 DOI: 10.1039/C4RA08353A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements