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Easy Scale‐Up Synthesis of Mo 8 O 26 (C 5 H 6 N) 4 .H 2 O Hybrid with a Rectangular Prism Morphology and Its Application as an Efficient and Highly Recyclable Bi‐functional Catalyst for Knoevenagel Condensations
Author(s) -
Feghhi Aliyeh,
Malakooti Reihaneh,
Malakooti Sadeq,
Hooshmand Nasrin
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803124
Subject(s) - thermogravimetric analysis , catalysis , malononitrile , knoevenagel condensation , infrared spectroscopy , molybdenum , scanning electron microscope , fourier transform infrared spectroscopy , nuclear chemistry , raman spectroscopy , materials science , elemental analysis , transmission electron microscopy , aqueous solution , analytical chemistry (journal) , inorganic chemistry , chemistry , organic chemistry , chemical engineering , nanotechnology , physics , optics , engineering , composite material
The Mo 8 O 26 (C 5 H 6 N) 4 .H 2 O hybrid with rectangular prism morphology was synthesized via a simple wet chemical method at room temperature in water. The as‐synthesized product was characterized by different methods, including X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT‐IR), Raman spectroscopy, N 2 ‐adsorption/desorption and elemental analysis. The Mo 8 O 26 (C 5 H 6 N) 4 .H 2 O hybrid catalyzed Knoevenagel condensation reaction as a bi‐functional catalyst. Moreover, the molybdenum (VI) site in this hybrid catalyzed selective oxidation of alcohols in the presence of molecular oxygen (O 2 ) as oxidant. The reaction of malononitrile with various aromatic aldehydes was carried out in aqueous media under mild temperature in the presence of no extra base or acid. On the other hand, the oxidation of alcohols with molecular oxygen progressed via a reusable heterogeneous system in a mild temperature. The reused catalysts from both systems were identified by XRD, FT‐IR, SEM and elemental analysis.