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-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Multidisciplinary Digital Publishing Institute
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/97033/1/ABSTRACT.pdf |
| _version_ | 1825937801610264576 |
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| 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 |
| collection | UPM |
| description | 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), 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 optimization 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. |
| first_indexed | 2024-03-06T11:05:02Z |
| format | Article |
| id | upm.eprints-97033 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T11:05:02Z |
| publishDate | 2021 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | upm.eprints-970332022-10-18T02:03:30Z http://psasir.upm.edu.my/id/eprint/97033/ 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 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), 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 optimization 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. Multidisciplinary Digital Publishing Institute 2021 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/97033/1/ABSTRACT.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). art. no. 5876. pp. 1-13. ISSN 1420-3049 https://www.mdpi.com/1420-3049/26/19/5876 10.3390/molecules26195876 |
| spellingShingle | 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/97033/1/ABSTRACT.pdf |
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