Synthesis, characterization and catalytic studies of bimetallic heteronuclear complexes for the reduction of nitroaromatic compounds.

Autor:	Adimula, Vincent O., Tella, Adedibu C., Owalude, Samson O., Oladipo, Adetola C., Olayemi, Victoria T., Adeniyi, Emmanuel, Ismail, Bushra, Mumtaz, Amara, Khan, Asad M.
Předmět:	NITROAROMATIC compounds CATALYTIC reduction FOURIER transforms NITROPHENOLS NICKEL COBALT
Zdroj:	Inorganic & Nano-Metal Chemistry; 2023, Vol. 53 Issue 5, p501-512, 12p
Abstrakt:	Four mixed-ligand complexes were prepared and formulated as [Ln(H2OBA)(H2PZDC)] and [Ln(H2OBA)(H2PDC)] {Ln = La & Gd; H2OBA = 4,4-oxybisbenzoic acid; H2PDC = 2,3-pyridinedicarboxylic acid; H2PZDC = 2,3-pyrazinedicarboxylic acid}. The complexes were modified by a nickel/cobalt impregnation method to generate bimetallic complexes 1–8. Fourier transform infrared (FTIR) spectroscopy analysis of the bimetallic complexes indicated that the carboxylate coordinated to the lanthanide ion via the OH- group while the Ni2+ and Co2+ ions were preferentially bonded to the nitrogen donor ligand via the N- group. Complete catalytic reduction of 4-nitrophenol to 4-aminophenol by the Ni@ complexes gave a maximum reduction time of 37 minutes for complex 1 while complex 7 gave a reduction time of 21 minutes. The rate constants were observed to increase with an increase in temperature up to 50 °C for complexes 3, 5, and 7. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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