Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions
A simple, efficient and economically viable method for the Heck reaction has been accomplished in the absence of phosphine ligand. The Heck reaction was performed using nanostructured Ni-Co/ZnO material as a heterogeneous catalyst in a DMF/H2O solvent system and in the presence of K2CO3, at 120 °C....
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535220304184 |
| _version_ | 1818955905893400576 |
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| author | Digambar B. Bankar Kaluram G. Kanade Ranjit R. Hawaldar Sudhir S. Arbuj Manish D. Shinde Shrikant P. Takle Dinesh P. Amalnerkar Santosh T. Shinde |
| author_facet | Digambar B. Bankar Kaluram G. Kanade Ranjit R. Hawaldar Sudhir S. Arbuj Manish D. Shinde Shrikant P. Takle Dinesh P. Amalnerkar Santosh T. Shinde |
| author_sort | Digambar B. Bankar |
| collection | DOAJ |
| description | A simple, efficient and economically viable method for the Heck reaction has been accomplished in the absence of phosphine ligand. The Heck reaction was performed using nanostructured Ni-Co/ZnO material as a heterogeneous catalyst in a DMF/H2O solvent system and in the presence of K2CO3, at 120 °C. The Ni-Co/ZnO nanostructures were prepared by the facile reduction-impregnation method. The structural and morphological properties of Ni-Co/ZnO nanostructure were investigated using various physico-chemical characterization techniques. Structural studies displayed the formation of hexagonal (wurtzite) ZnO. Electron microscopy imaging showed the presence of agglomerated clusters of Ni-Co nanoparticles over the surfaces of elliptical, flower bud-like and irregularly shaped sub-micron sized particle bundles of ZnO. The elemental composition analysis (EDX) confirmed the loading of Ni and Co nanoparticles over the nanocrystalline ZnO. The surface chemical state analysis of Ni-Co/ZnO material validated that Ni nanostructure exists in Ni2+ and Ni3+ species, whereas, Co nanostructure exists in Co2+ and Co3+ species. UV–Vis diffuse reflectance spectroscopy displays red shift in the light absorption edge of Ni-Co/ZnO catalyst compared to pure ZnO. The as-prepared Ni-Co bimetallic supported ZnO nanostructure showed better catalytic activity and stability for the Heck reactions under phosphine ligand-free conditions. Ni-Co/ZnO catalyzed Heck reactions afforded the corresponding cross-coupled products with moderate to good yields (up to 92%). Ni-Co/ZnO catalyst could be reused for five successive runs without significant loss of catalytic activity. |
| first_indexed | 2024-12-20T10:45:30Z |
| format | Article |
| id | doaj.art-35aec64a81754c7b8123a6f1c02b9dc8 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-20T10:45:30Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-35aec64a81754c7b8123a6f1c02b9dc82022-12-21T19:43:24ZengElsevierArabian Journal of Chemistry1878-53522020-12-01131290059018Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditionsDigambar B. Bankar0Kaluram G. Kanade1Ranjit R. Hawaldar2Sudhir S. Arbuj3Manish D. Shinde4Shrikant P. Takle5Dinesh P. Amalnerkar6Santosh T. Shinde7Centre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, India; P.G. Department of Chemistry, R. B. Narayanrao Borawake College, Shrirampur, Ahmednagar 413709, IndiaCentre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, India; P.G. and Research Centre, Yashavantrao Chavan Institute of Science, Satara 415001, India; Corresponding author at: Centre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, India.Centre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, IndiaCentre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, IndiaCentre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, IndiaCentre for Materials for Electronics Technology (C-MET), Panchwati, Off Pashan Road, Pune 411008, IndiaDepartment of Technology, Savitribai Phule Pune University (SPPU), Pune 411007, IndiaP.G. Department of Chemistry, Maharaja Jivajirao Shinde Mahavidyalaya, Shrigonda, Ahmednagar 413701, IndiaA simple, efficient and economically viable method for the Heck reaction has been accomplished in the absence of phosphine ligand. The Heck reaction was performed using nanostructured Ni-Co/ZnO material as a heterogeneous catalyst in a DMF/H2O solvent system and in the presence of K2CO3, at 120 °C. The Ni-Co/ZnO nanostructures were prepared by the facile reduction-impregnation method. The structural and morphological properties of Ni-Co/ZnO nanostructure were investigated using various physico-chemical characterization techniques. Structural studies displayed the formation of hexagonal (wurtzite) ZnO. Electron microscopy imaging showed the presence of agglomerated clusters of Ni-Co nanoparticles over the surfaces of elliptical, flower bud-like and irregularly shaped sub-micron sized particle bundles of ZnO. The elemental composition analysis (EDX) confirmed the loading of Ni and Co nanoparticles over the nanocrystalline ZnO. The surface chemical state analysis of Ni-Co/ZnO material validated that Ni nanostructure exists in Ni2+ and Ni3+ species, whereas, Co nanostructure exists in Co2+ and Co3+ species. UV–Vis diffuse reflectance spectroscopy displays red shift in the light absorption edge of Ni-Co/ZnO catalyst compared to pure ZnO. The as-prepared Ni-Co bimetallic supported ZnO nanostructure showed better catalytic activity and stability for the Heck reactions under phosphine ligand-free conditions. Ni-Co/ZnO catalyzed Heck reactions afforded the corresponding cross-coupled products with moderate to good yields (up to 92%). Ni-Co/ZnO catalyst could be reused for five successive runs without significant loss of catalytic activity.http://www.sciencedirect.com/science/article/pii/S1878535220304184Nanostructured Ni-Co/ZnO materialHeck reactionPhosphine ligand-free conditionHeterogeneous catalyst |
| spellingShingle | Digambar B. Bankar Kaluram G. Kanade Ranjit R. Hawaldar Sudhir S. Arbuj Manish D. Shinde Shrikant P. Takle Dinesh P. Amalnerkar Santosh T. Shinde Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions Arabian Journal of Chemistry Nanostructured Ni-Co/ZnO material Heck reaction Phosphine ligand-free condition Heterogeneous catalyst |
| title | Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions |
| title_full | Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions |
| title_fullStr | Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions |
| title_full_unstemmed | Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions |
| title_short | Facile synthesis of nanostructured Ni-Co/ZnO material: An efficient and inexpensive catalyst for Heck reactions under ligand-free conditions |
| title_sort | facile synthesis of nanostructured ni co zno material an efficient and inexpensive catalyst for heck reactions under ligand free conditions |
| topic | Nanostructured Ni-Co/ZnO material Heck reaction Phosphine ligand-free condition Heterogeneous catalyst |
| url | http://www.sciencedirect.com/science/article/pii/S1878535220304184 |
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