Cover Image

Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile

A series of urea-immobilized SBA-15 catalysts were synthesized via post grafting method using 3-chloropropyltriethoxysilane (CPTES) as the anchoring agent. The solid catalyst was characterized by PXRD, N2 adsorption-desorption, FT-IR, elemental analyzer, TEM, CO2-TPD and 29Si CP/MAS NMR. Detailed an...

Full description

Saved in:
Bibliographic Details
Main Authors: Appaturi, Jimmy Nelson, Johan, Mohd Rafie, Ramalingam, R. Jothi, Al-Lohedan, Hamad A.
Format: Article
Published: Elsevier 2018
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://eprints.um.edu.my/22460/
https://doi.org/10.1016/j.micromeso.2017.07.055
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.eprints.22460
record_format eprints
spelling my.um.eprints.224602019-09-20T02:08:47Z http://eprints.um.edu.my/22460/ Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile Appaturi, Jimmy Nelson Johan, Mohd Rafie Ramalingam, R. Jothi Al-Lohedan, Hamad A. Q Science (General) QD Chemistry A series of urea-immobilized SBA-15 catalysts were synthesized via post grafting method using 3-chloropropyltriethoxysilane (CPTES) as the anchoring agent. The solid catalyst was characterized by PXRD, N2 adsorption-desorption, FT-IR, elemental analyzer, TEM, CO2-TPD and 29Si CP/MAS NMR. Detailed analysis of the pore size illustrated the mesoporous nature of the immobilized catalyst. The as-prepared catalyst was further evaluated in the Knoevenagel condensation reaction under different reaction conditions. Benzaldehyde was employed in the Knoevenagel condensation reaction with malononitrile. Catalytic results showed that the Urea(4.8)/SBA-15 exhibits high efficacy (98% of yield) for promoting this reaction at 40 °C and in the absence of a solvent. Under the same reaction conditions, acetylacetone led to a lower benzaldehyde conversion of 10%, whereas ethyl cyanoacetate provides up to 88% conversion. The catalyst could be recycled and reused for at least five reaction cycles with slight loss of catalytic activity. Elsevier 2018 Article PeerReviewed Appaturi, Jimmy Nelson and Johan, Mohd Rafie and Ramalingam, R. Jothi and Al-Lohedan, Hamad A. (2018) Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile. Microporous and Mesoporous Materials, 256. pp. 67-74. ISSN 1387-1811 https://doi.org/10.1016/j.micromeso.2017.07.055 doi:10.1016/j.micromeso.2017.07.055
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QD Chemistry
spellingShingle Q Science (General)
QD Chemistry
Appaturi, Jimmy Nelson
Johan, Mohd Rafie
Ramalingam, R. Jothi
Al-Lohedan, Hamad A.
Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
description A series of urea-immobilized SBA-15 catalysts were synthesized via post grafting method using 3-chloropropyltriethoxysilane (CPTES) as the anchoring agent. The solid catalyst was characterized by PXRD, N2 adsorption-desorption, FT-IR, elemental analyzer, TEM, CO2-TPD and 29Si CP/MAS NMR. Detailed analysis of the pore size illustrated the mesoporous nature of the immobilized catalyst. The as-prepared catalyst was further evaluated in the Knoevenagel condensation reaction under different reaction conditions. Benzaldehyde was employed in the Knoevenagel condensation reaction with malononitrile. Catalytic results showed that the Urea(4.8)/SBA-15 exhibits high efficacy (98% of yield) for promoting this reaction at 40 °C and in the absence of a solvent. Under the same reaction conditions, acetylacetone led to a lower benzaldehyde conversion of 10%, whereas ethyl cyanoacetate provides up to 88% conversion. The catalyst could be recycled and reused for at least five reaction cycles with slight loss of catalytic activity.
format Article
author Appaturi, Jimmy Nelson
Johan, Mohd Rafie
Ramalingam, R. Jothi
Al-Lohedan, Hamad A.
author_facet Appaturi, Jimmy Nelson
Johan, Mohd Rafie
Ramalingam, R. Jothi
Al-Lohedan, Hamad A.
author_sort Appaturi, Jimmy Nelson
title Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
title_short Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
title_full Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
title_fullStr Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
title_full_unstemmed Highly efficient green mesostructured urea functionalized on SBA-15 catalysts for selective synthesis of benzlidenemalononitrile
title_sort highly efficient green mesostructured urea functionalized on sba-15 catalysts for selective synthesis of benzlidenemalononitrile
publisher Elsevier
publishDate 2018
url http://eprints.um.edu.my/22460/
https://doi.org/10.1016/j.micromeso.2017.07.055
_version_ 1646210248058339328
score 13.211869

Similar Items