Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands
The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride was used as a model to test the catalytic activity of copper(II) complexes containing N,O-chelating Schiff base ligands. In this study, a series of copper(II) complexes containing respective Schiff base ligands, N′-salicylidene-2-...
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Online Access: | http://eprints.utm.my/id/eprint/94472/1/MohamadShazwanShah2021_EfficientCatalyticReductionof4Nitrophenol.pdf http://eprints.utm.my/id/eprint/94472/ http://dx.doi.org/10.3390/molecules26195876 |
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my.utm.944722022-03-31T15:46:18Z http://eprints.utm.my/id/eprint/94472/ Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands Garba, Hassan Wafi Abdullahi, Muhammad Sabiu Jamil, Mohamad Shazwan Shah Endot, Nor Azam QD Chemistry The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride was used as a model to test the catalytic activity of copper(II) complexes containing N,O-chelating Schiff base ligands. In this study, a series of copper(II) complexes containing respective Schiff base ligands, N′-salicylidene-2-aminophenol (1), N′-salicylidene-2-aminothiazole (2), and N,N′-bis(salicylidene)-o-phenylenediamine (3), were synthesized and characterized by elemental analysis, Fourier transform infrared (FT-IR), and UV-Visible (UV-Vis) and electron paramagnetic resonance (EPR) spectroscopies. The results from the 4-nitrophenol reduction showed that 3 has the highest catalytic activities with 97.5% conversion, followed by 2 and 1 with 95.2% and 90.8% conversions, respectively. The optimiza-tion of the catalyst amount revealed that 1.0 mol% of the catalyst was the most optimized amount with the highest conversion compared to the other doses, 0.5 mol% and 1.5 mol%. Recyclability and reproducibility tests confirmed that all three complexes were active, efficient, and possess excellent reproducibility with consistent catalytic performances and could be used again without a major decrease in the catalytic activity. MDPI 2021-10-01 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/94472/1/MohamadShazwanShah2021_EfficientCatalyticReductionof4Nitrophenol.pdf Garba, Hassan Wafi and Abdullahi, Muhammad Sabiu and Jamil, Mohamad Shazwan Shah and Endot, Nor Azam (2021) Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands. Molecules, 26 (19). pp. 1-12. ISSN 1420-3049 http://dx.doi.org/10.3390/molecules26195876 DOI:10.3390/molecules26195876 |
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QD Chemistry Garba, Hassan Wafi Abdullahi, Muhammad Sabiu Jamil, Mohamad Shazwan Shah Endot, Nor Azam Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
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The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride was used as a model to test the catalytic activity of copper(II) complexes containing N,O-chelating Schiff base ligands. In this study, a series of copper(II) complexes containing respective Schiff base ligands, N′-salicylidene-2-aminophenol (1), N′-salicylidene-2-aminothiazole (2), and N,N′-bis(salicylidene)-o-phenylenediamine (3), were synthesized and characterized by elemental analysis, Fourier transform infrared (FT-IR), and UV-Visible (UV-Vis) and electron paramagnetic resonance (EPR) spectroscopies. The results from the 4-nitrophenol reduction showed that 3 has the highest catalytic activities with 97.5% conversion, followed by 2 and 1 with 95.2% and 90.8% conversions, respectively. The optimiza-tion of the catalyst amount revealed that 1.0 mol% of the catalyst was the most optimized amount with the highest conversion compared to the other doses, 0.5 mol% and 1.5 mol%. Recyclability and reproducibility tests confirmed that all three complexes were active, efficient, and possess excellent reproducibility with consistent catalytic performances and could be used again without a major decrease in the catalytic activity. |
format |
Article |
author |
Garba, Hassan Wafi Abdullahi, Muhammad Sabiu Jamil, Mohamad Shazwan Shah Endot, Nor Azam |
author_facet |
Garba, Hassan Wafi Abdullahi, Muhammad Sabiu Jamil, Mohamad Shazwan Shah Endot, Nor Azam |
author_sort |
Garba, Hassan Wafi |
title |
Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
title_short |
Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
title_full |
Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
title_fullStr |
Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
title_full_unstemmed |
Efficient catalytic reduction of 4-nitrophenol using copper(II) complexes with n,o-chelating schiff base ligands |
title_sort |
efficient catalytic reduction of 4-nitrophenol using copper(ii) complexes with n,o-chelating schiff base ligands |
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MDPI |
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2021 |
url |
http://eprints.utm.my/id/eprint/94472/1/MohamadShazwanShah2021_EfficientCatalyticReductionof4Nitrophenol.pdf http://eprints.utm.my/id/eprint/94472/ http://dx.doi.org/10.3390/molecules26195876 |
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13.18916 |