Loading...

Application of magnetic sulfonated Alnus waste leaves as a heterogeneous catalyst for multi-component reactions; comparison and evaluation of acidity of eleven different leaves

Moghaddam, F. M ; Sharif University of Technology | 2022

115 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/s11144-022-02176-z
  3. Publisher: Springer Science and Business Media B.V , 2022
  4. Abstract:
  5. A comprehensive study was carried out for the first time on the acidity of eleven different leaves. After functionalization of the leaves with –SO3H groups, the most acidic one was magnetized using nickel ferrite nanoparticles. This novel, inexpensive, green and biodegradable catalyst showed high activity in the synthesis of pyrazoline and 2-amino nicotinonitriles. Some compounds are new and have never been synthesized before and confirmed by FT-IR, 1H NMR and 13C NMR analysis. All of these compounds possess multiple biological activities. The heterogeneous magnetic catalyst (NiFe2O4-Alnus-SO3H) was characterized by various physicochemical techniques such as FT-IR spectroscopy, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), thermal gravimetric analysis/differential thermogravimetry (TGA/DTG), and VSM techniques which showed high sulfur content 0.92 (mmol/g) and high acidic strength. The main advantages of this method are high yields, short reaction time, easy work-up, green solvent, heterogeneity of the catalyst and simple purification of compounds. It is important to mention that there is no report on the preparation of heterogeneous acid catalyst from waste leaves for the synthesis pyrazoline and 2-amino nicotinonitriles derivatives. Graphical abstract: [Figure not available: see fulltext.] © 2022, Akadémiai Kiadó, Budapest, Hungary
  6. Keywords:
  7. 2-Amino nicotinonitriles ; Alnusviridis ; Cellulose ; Green chemistry ; Nanocatalyst ; Pyrazoline ; Solid acid ; Catalyst activity ; Enamels ; Field emission microscopes ; Nanocatalysts ; Nuclear magnetic resonance ; Scanning electron microscopy ; Thermogravimetric analysis ; 2-amino nicotinonitrile ; Green-chemistry ; Heterogeneous catalyst ; Heterogenic catalyst ; Nano-catalyst ; Pyrazolines ; Solid acid ; Wast leave ; ]+ catalyst ; Sustainable chemistry
  8. Source: Reaction Kinetics, Mechanisms and Catalysis ; Volume 135, Issue 2 , 2022 , Pages 811-833 ; 18785190 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11144-022-02176-z