Polyvinyl amine as a modified and grafted shell for Fe3O4 nanoparticles: As a strong solid base catalyst for the synthesis of various dihydropyrano[2,3-c] pyrazole derivatives and the Knoevenagel condensation
Joint Authors
Arghan, Maryam
Kawkabi, Nadiyah
Kolvari, Eskandar
Source
Journal of Saudi Chemical Society
Issue
Vol. 23, Issue 2 (28 Feb. 2019), pp.150-161, 12 p.
Publisher
Publication Date
2019-02-28
Country of Publication
Saudi Arabia
No. of Pages
12
Main Subjects
Topics
Abstract EN
In this work, we reported one-step deposition of polyacrylamide on nano-magnetite surface via a simple and in situ polymerization of acryl amide to form n-Fe3O4/PAM nanocomposite.
The amide (–CONH2) groups could be converted easily to amine (–NH2) groups through Hofmann degradation to introduce n-Fe3O4/PVAm as a highly efficient heterogeneous base catalyst.
The obtained organic-inorganic nanocomposite exhibited high catalytic activity for the solvent-free syntheses of various dihydropyrano[2,3-c]pyrazole derivatives and the Knoevenagel condensation in high to excellent yields and in the following, a plausible mechanism for the synthesis of them has been proposed.
Because of the polymer layer coated Fe3O4 nanoparticles, the catalyst has many catalytic units, and acceptable thermal stability and recyclability.
Titration, FT-IR, SEM, TGA, VSM, and XRD analysis were used for characterization of the catalyst.
Also, the nanocomposite can be easily recovered by a magnetic field and reused up to 9 times without distinct deterioration in catalytic activity.
American Psychological Association (APA)
Arghan, Maryam& Kawkabi, Nadiyah& Kolvari, Eskandar. 2019. Polyvinyl amine as a modified and grafted shell for Fe3O4 nanoparticles: As a strong solid base catalyst for the synthesis of various dihydropyrano[2,3-c] pyrazole derivatives and the Knoevenagel condensation. Journal of Saudi Chemical Society،Vol. 23, no. 2, pp.150-161.
https://search.emarefa.net/detail/BIM-892775
Modern Language Association (MLA)
Arghan, Maryam…[et al.]. Polyvinyl amine as a modified and grafted shell for Fe3O4 nanoparticles: As a strong solid base catalyst for the synthesis of various dihydropyrano[2,3-c] pyrazole derivatives and the Knoevenagel condensation. Journal of Saudi Chemical Society Vol. 23, no. 2 (Feb. 2019), pp.150-161.
https://search.emarefa.net/detail/BIM-892775
American Medical Association (AMA)
Arghan, Maryam& Kawkabi, Nadiyah& Kolvari, Eskandar. Polyvinyl amine as a modified and grafted shell for Fe3O4 nanoparticles: As a strong solid base catalyst for the synthesis of various dihydropyrano[2,3-c] pyrazole derivatives and the Knoevenagel condensation. Journal of Saudi Chemical Society. 2019. Vol. 23, no. 2, pp.150-161.
https://search.emarefa.net/detail/BIM-892775
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 161
Record ID
BIM-892775