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Catalytic reduction of 4‐nitrophenol by means of nanostructured polymeric Schiff base complexes
Author(s) -
Aghaei Marjan,
Kianfar Ali Hossein,
Dinari Mohammad
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5617
Subject(s) - chemistry , sodium borohydride , thermogravimetric analysis , schiff base , catalysis , thermal stability , fourier transform infrared spectroscopy , nuclear chemistry , 4 nitrophenol , aqueous solution , polymer chemistry , inorganic chemistry , organic chemistry , chemical engineering , engineering
Polymeric Schiff base ligands were synthesized using 2‐hydroxybenzaldehyde (L 2 ), 4‐hydroxy‐3‐methoxybenzaldehyde (L 4 ), and 5‐aminoisophthalic acid. The nanostructured complexes were then synthesized using Ni 2+ , Cu 2+ , and Mn 3+ . The ligands and complexes thus synthesized were characterized using Fourier‐transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis (TGA), and field‐emission scanning electron microscopy. The thermal stability of the complexes was confirmed using TGA. The synthesized complexes were used as catalysts in the reduction of 4‐nitrophenol (4‐NP) to 4‐aminophenol in an aqueous phase in the presence of sodium borohydride. In this work, the catalytic reactivity of nanostructured complexes was compared using the rate constant ( k ) of the reaction. The reaction time for the reduction of 4‐NP was 5–14 min for different complexes. The catalytic system based on Ni 2+ /2‐hydroxybenzaldehyde was the most active and displayed reusability in the reduction of 4‐NP.