NDLI: Sulfonic acid functionalized silica nanoparticles as catalysts for the esterification of linoleic acid

Content Provider	Royal Society of Chemistry (RSC)
Author	Peixoto, Andreia F. Aboelhassan, Mohamed M. Freire, Cristina
Copyright Year	2017
Abstract	In this work we describe a comprehensive study on sulfonic acid functionalized silica nanoparticles (SiO2NPs) as novel catalysts for esterification of linoleic acid in the presence of methanol. SiO2NPs were covalently functionalized with propyl- or aryl-sulfonic acid groups (SO3H–) by several post-grafting methodologies through a sylilation reaction involving methoxy/ethoxy derivative organosilanes. Alkyl-sulfonic SiO2NPs were prepared by a two-step protocol using 3-mercaptopropyltrimethoxysilane followed by oxidation using H2O2 (1) or HNO3 (2) and chlorosulfonation (3). Aryl sulfonic acid SiO2NPs were prepared by a two-step protocol using phenyltriethoxysilane (a) and phenyltrimethoxysilane (b), followed by chlorosulfonation (4a and 4b) and sulfonation (5a and 5b); direct silylation with (4-chlorosulfonylphenyl)ethyltrimethoxysilane allowed the preparation of 6. The physicochemical characterization of all SO3H–SiO2NPs showed that the nanocatalysts 3, 4b and 6 exhibited the highest acidity capacity (estimated by EA sulphur content and potentiometric titration), with pHpzc lower than 2.0, suggesting that the use of either methoxy derivative organosilanes and chlorosulfonation steps played key roles in the surface acidity fine-tuning of SiO2NPs. These catalysts exhibited excellent performance in the heterogeneous esterification of linoleic acid with 100% conversion in a 2 h reaction time, with rate constants in the range of 1.80–5.55 h−1 and TOF values in the interval 53–498 h−1. The nanocatalyst 6 showed the highest stability and reusability for 5 catalytic cycles.
Starting Page	3595
Ending Page	3605
Page Count	11
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	41
Issue Number	9
Journal	New Journal of Chemistry
DOI	10.1039/c6nj04043h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ester Hydrogen peroxide Silicon dioxide Methoxy group Nitric acid Sulfonic acid Methanol Nucleophile Potentiometric titration
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Sulfonic Acid-Functionalized Solid Acid Catalyst in Esterification and Transesterification Reactions

Sulfonic acid-functionalized MIL-101 as a highly recyclable catalyst for esterification

Sulfonic acid-functionalized periodic mesoporous organosilicas in esterification and selective acylation reactions

Use of sulfonic acid-functionalized silica as catalyst for esterification of free fatty acids (FFA) in acid oil for biodiesel production: an optimization study

Effect of acid pre-treatment on AuPd/SiO₂ catalysts for the direct synthesis of hydrogen peroxide

p-Sulfonic acid calix[4]arene-functionalized alkyl-bridged organosilica in esterification reactions

Sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs): a recoverable heterogeneous acid catalyst for green synthesis of dicoumarols

Efficient synthesis of 3,3-di(indolyl)oxindoles catalyzed by sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs) in aqueous media

Immobilization of lipase onto aminopropyl-functionalized MSU-H type mesoporous silica and esterification

Sulfonic acid functionalized silica nanoparticles as catalysts for the esterification of linoleic acid

Similar Documents

Sulfonic Acid-Functionalized Solid Acid Catalyst in Esterification and Transesterification Reactions

Sulfonic acid-functionalized MIL-101 as a highly recyclable catalyst for esterification

Sulfonic acid-functionalized periodic mesoporous organosilicas in esterification and selective acylation reactions

Use of sulfonic acid-functionalized silica as catalyst for esterification of free fatty acids (FFA) in acid oil for biodiesel production: an optimization study

Effect of acid pre-treatment on AuPd/SiO2 catalysts for the direct synthesis of hydrogen peroxide

p-Sulfonic acid calix[4]arene-functionalized alkyl-bridged organosilica in esterification reactions

Sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs): a recoverable heterogeneous acid catalyst for green synthesis of dicoumarols

Efficient synthesis of 3,3-di(indolyl)oxindoles catalyzed by sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs) in aqueous media

Immobilization of lipase onto aminopropyl-functionalized MSU-H type mesoporous silica and esterification

Sulfonic acid functionalized silica nanoparticles as catalysts for the esterification of linoleic acid

Effect of acid pre-treatment on AuPd/SiO₂ catalysts for the direct synthesis of hydrogen peroxide