Journal article
Fe-polyaniline composite nanofiber catalyst for chemoselective hydrolysis of oxime.
- Mahato SK Department of Civil and Chemical Engineering, University of South Africa (UNISA), PO Box 392, Pretoria 0003, South Africa.
- Bhaumik M Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa.
- Maji A Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India.
- Dutta A Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
- Maiti D Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India. Electronic address: dmaiti@iitb.ac.in.
- Maity A Department of Civil and Chemical Engineering, University of South Africa (UNISA), PO Box 392, Pretoria 0003, South Africa; Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa; National Centre for Nanostructured Materials, Materials Science and Manufacturing, Council for Scientific and Industrial Research (CSIR), Pretoria, South Africa. Electronic address: amaity@csir.co.za.
- 2017-12-02
Published in:
- Journal of colloid and interface science. - 2018
English
A facile chemoselective one-pot strategy for the deprotection of oxime has been developed using Fe0-polyaniline composite nanofiber (Fe0-PANI), as a catalyst. Nano material based Fe0-PANI catalyst has been synthesized via in-situ polymerization of ANI monomer and followed by reductive deposition of Fe0 onto PANI matrix. The catalyst was characterized by FE-SEM, HR-TEM, BET, XRD, ATR-FTIR, XPS and VSM techniques. The scope of the transformation was studied for aryl, alkyl and heteroarylketoxime with excellent chemoselectivity (>99%). Mechanistic investigations suggested the involvement of a cationic intermediate with Fe3+ active catalytic species. Substituent effect showed a linear free energy relationship. The activation energy (Ea) was calculated to be 17.46 kJ mol-1 for acetophenone oxime to acetophenone conversion. The recyclability of the catalyst demonstrated up to 10 cycles without any significant loss of efficiency. Based on the preliminary experiments a plausible mechanism has been proposed involving a carbocationic intermediate.
- Language
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- English
- Open access status
- closed
- Identifiers
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- DOI 10.1016/j.jcis.2017.11.059
- PMID 29195179
- Persistent URL
- https://sonar.ch/global/documents/269780
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