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Kumar P, Tomar V, Kumar D, Joshi RK, Nemiwal M. Magnetically active iron oxide nanoparticles for catalysis of organic transformations: A review. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132641] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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XPS and structural studies of Fe 3O 4-PTMS-NAS@Cu as a novel magnetic natural asphalt base network and recoverable nanocatalyst for the synthesis of biaryl compounds. Sci Rep 2021; 11:24508. [PMID: 34969977 PMCID: PMC8718525 DOI: 10.1038/s41598-021-04111-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 12/13/2021] [Indexed: 12/04/2022] Open
Abstract
In this research, natural asphalt as a mineral carbonuous material was converted to sodium natural asphalt sulfonate (Na-NAS) and, then, was linked to Fe3O4 MNPs in order to synthesize the magnetic nanocatalyst. Afterwards, Cupper (I) and Cu (II) was grafted on Fe3O4-PTMS-NAS. Moreover, it is worth mentioning that the synthesized the novel magnetic nanocatalyst (Fe3O4-PTMS-NAS@Cu) was successfully used in Suzuki and Stille coupling reactions. The Fe3O4-PTMS-NAS@Cu MNPs were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), inductively coupled plasma (ICP), BET and X-ray photoelectron spectroscopy (XPS) analysis. Besides, sulfonation of natural asphalt, magnetization of catalyst, grafting of Cu (I) and Cu (II) to NAS and catalyst formation were investigated and proved carefully. This nanocatalyst can be comfortably separated from the reaction medium through an external magnetic field and can also be recovered and reused, while maintaining its catalytic activity.
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Halligudra G, Paramesh CC, Mudike R, Ningegowda M, Rangappa D, Shivaramu PD. Pd II on Guanidine-Functionalized Fe 3O 4 Nanoparticles as an Efficient Heterogeneous Catalyst for Suzuki-Miyaura Cross-Coupling and Reduction of Nitroarenes in Aqueous Media. ACS OMEGA 2021; 6:34416-34428. [PMID: 34963927 PMCID: PMC8697406 DOI: 10.1021/acsomega.1c04528] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/26/2021] [Indexed: 05/27/2023]
Abstract
This paper presents guanidine-functionalized Fe3O4 magnetic nanoparticle-supported palladium (II) (Fe3O4@Guanidine-Pd) as an effective catalyst for Suzuki-Miyaura cross-coupling of aryl halides using phenylboronic acids and also for selective reduction of nitroarenes to their corresponding amines. Fe3O4@Guanidine-Pd synthesized is well characterized using FT-IR spectroscopy, XRD, SEM, TEM, EDX, thermal gravimetric analysis, XPS, inductively coupled plasma-optical emission spectroscopy, and vibrating sample magnetometry analysis. The prepared Fe3O4@Guanidine-Pd showed effective catalytic performance in the Suzuki-Miyaura coupling reactions by converting aryl halides to their corresponding biaryl derivatives in an aqueous environment in a shorter reaction time and with a meagerly small amount of catalyst (0.22 mol %). Also, the prepared Fe3O4@Guanidine-Pd effectively reduced nitroarenes to their corresponding amino derivatives in aqueous media at room temperature with a high turnover number and turnover frequency with the least amount of catalyst (0.13 mol %). The most prominent feature of Fe3O4@Guanidine-Pd as a catalyst is the ease of separation of the catalyst from the reaction mixture after the reaction with the help of an external magnet with good recovery yield and also reuse of the recovered catalyst for a few cycles without significant loss in its catalytic activity.
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Affiliation(s)
- Guddappa Halligudra
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Chitrabanu C. Paramesh
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Ravi Mudike
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
- Solar
Resource Assessment Division, National Institute
of Solar Energy, Gwal Pahari, Gurugram 122 003, Haryana, India
| | - Mallesha Ningegowda
- SRI
RAM CHEM, R & D Centre, Plot No. 31, JCK Industrial Park, Belagola Industrial Area, Mysore 570016, India
| | - Dinesh Rangappa
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
| | - Prasanna D. Shivaramu
- Department
of Applied Sciences, Center for Postgraduate Studies, Visvesvaraya Technological University, Bengaluru Region, Muddenahalli, Chikkaballapur District 562 101, India
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