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Porous Triazine Containing Covalent Organic Polymer Supported Pd Nanoparticles: A Stable and Efficient Heterogeneous Catalyst for Sonogashira Cross‐Coupling and the Reduction of Nitroarenes
Author(s) -
Sadhasivam Velu,
Mariyappan Mathappan,
Siva Ayyanar
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802977
Subject(s) - sonogashira coupling , catalysis , phenylacetylene , hydrazine (antidepressant) , triazine , coupling reaction , polymer chemistry , nanoparticle , materials science , hydrosilylation , polymer , aryl , coordination polymer , solvent , nuclear chemistry , chemistry , inorganic chemistry , palladium , organic chemistry , nanotechnology , alkyl , chromatography
Here, we report the synthesis and characterization of palladium nanoparticles immobilized on ( Pd@DASs ) triazine containing covalent organic polymer prepared through solvothermal method to the formation of Schiff base polymer condensation reaction between 1,4‐diaminobenzene and 4,4′,4′′‐(1,3,5‐triazine‐2,4,6‐triyl)tribenzaldehyde, respectively. The synthesized Pd@DASs was thoroughly characterized by various techniques including FT‐IR, UV‐DRS, EDAX, powder XRD, scanning electron microscopy (SEM) and X‐ray photoelectron spectroscopy. Furthermore, the prepared Pd@DASs potential catalytic performance was evaluated for Sonogashira cross‐coupling of various aryl halides with phenylacetylene, K 2 CO 3 as a base in water/DMF (2:1) solvent for about 3 h and the same catalyst was used for reduction of nitroarenes using hydrazine hydrate (Hydrogen source) in methanol/water (1:2) mixture of solvent for about 1.30 h under mild reaction conditions. Neither copper and nor ligand and additives are required in the reaction medium, which exhibits high catalytic activity and excellent to good yield (upto 96% and 99%), the catalyst can be separated easily and recycle for several times.