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چکیده
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Hydrogen bonding is of paramount importance in many chemical reactions such as reduction, ring closure, selective stereo reactions, and heterocycle synthesis. Hydrogen bonding plays an important role in enzymatic catalysis, arrangement of molecules in crystals, crystal engineering, supramolecular chemistry, and proton transfer reactions. [1-2] Magnetic nanoparticles (MNPs) have been increasingly used in catalysis over the past decade because of their easy recyclable, economical and environmentally safe recovery. In such a case, Fe3O4 nanoparticles with strong response to external magnetic field and high surface area, provide proper conditions to anchoring catalytically active organic linkers. [3-4] Pyridine, a heterocyclic compound, is used as a medicine for treatment of diseases such as depression. [5]
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