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Dupont J, Leal BC, Lozano P, Monteiro AL, Migowski P, Scholten JD. Ionic Liquids in Metal, Photo-, Electro-, and (Bio) Catalysis. Chem Rev 2024; 124:5227-5420. [PMID: 38661578 DOI: 10.1021/acs.chemrev.3c00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Ionic liquids (ILs) have unique physicochemical properties that make them advantageous for catalysis, such as low vapor pressure, non-flammability, high thermal and chemical stabilities, and the ability to enhance the activity and stability of (bio)catalysts. ILs can improve the efficiency, selectivity, and sustainability of bio(transformations) by acting as activators of enzymes, selectively dissolving substrates and products, and reducing toxicity. They can also be recycled and reused multiple times without losing their effectiveness. ILs based on imidazolium cation are preferred for structural organization aspects, with a semiorganized layer surrounding the catalyst. ILs act as a container, providing a confined space that allows modulation of electronic and geometric effects, miscibility of reactants and products, and residence time of species. ILs can stabilize ionic and radical species and control the catalytic activity of dynamic processes. Supported IL phase (SILP) derivatives and polymeric ILs (PILs) are good options for molecular engineering of greener catalytic processes. The major factors governing metal, photo-, electro-, and biocatalysts in ILs are discussed in detail based on the vast literature available over the past two and a half decades. Catalytic reactions, ranging from hydrogenation and cross-coupling to oxidations, promoted by homogeneous and heterogeneous catalysts in both single and multiphase conditions, are extensively reviewed and discussed considering the knowledge accumulated until now.
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Affiliation(s)
- Jairton Dupont
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Bárbara C Leal
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Adriano L Monteiro
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Migowski
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Jackson D Scholten
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
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2
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Unsupported Copper Nanoparticles in the Arylation of Amines. Catalysts 2023. [DOI: 10.3390/catal13020331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Commercially available copper and copper (II) oxide nanoparticles (CuNPs and CuO NPs) were characterized using TEM and electronography methods to elucidate their true average size and composition. The catalytic amine arylation using unsupported copper nanoparticles differing in their size and copper oxidation state was investigated. The reaction of the model iodobenzene with n-octylamine was shown to be successfully catalyzed by CuNPs of average size 25 and 10/80 nm in the presence of the ligands such as 2-isobutyrylcyclohexanone (L1) and rac-1,1′-bi-2-naphthol (BINOL, L2), giving high yields (up to 95%) of the target N-octylaniline. CuO in bulk and nano forms was shown to be almost equally efficient in this process. Studies on the Cu-catalyzed amination of substituted iodobenzenes and 2-iodopyridine, as well as the arylation of different aliphatic amines and NH-heterocycles, verified that CuNPs (25 or 10/80 nm) with L1 and L2 are the most versatile and efficient nanocatalysts for a variety of substrates. Investigation of copper leaching under different conditions was carried out.
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Naapuri JM, Losada García N, Rothemann RA, Carmona Pichardo M, Prechtl MHG, Palomo JM, Deska J. Cascade catalysis through bifunctional lipase metal biohybrids for the synthesis of enantioenriched O‐heterocycles from allenes. ChemCatChem 2022; 14:e202200362. [PMID: 36246043 PMCID: PMC9544965 DOI: 10.1002/cctc.202200362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/20/2022] [Indexed: 11/25/2022]
Abstract
Lipase/metal nanobiohybrids, generated by growth of silver or gold nanoparticles on protein matrixes are used as highly effective dual‐activity heterogeneous catalysts for the production of enantiomerically enriched 2,5‐dihydrofurans from allenic acetates in a one‐pot cascade process combining a lipase‐mediated hydrolytic kinetic resolution with a metal‐catalyzed allene cycloisomerization. Incorporating a novel strategy based on enzyme‐polymer bioconjugates in the nanobiohybrid preparation enables excellent conversions in the process. Candida antarctica lipase B (CALB) in combination with a dextran‐based polymer modifier (DexAsp) proved to be most efficient when merged with silver nanoparticles. A range of hybrid materials were produced, combining Ag or Au metals with Thermomyces lanuginosus lipase (TLL) or CALB and its DexAsp or polyethyleneimine polymer bioconjugates. The wider applicability of the biohybrids is demonstrated by their use in allenic alcohol cyclizations, where a variety of dihydrofurans are obtained using a CALB/gold nanomaterial. These results underline the potential of the nanobiohybrid catalysis as promising approach to intricate one‐pot synthetic strategies.
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Affiliation(s)
- Janne M Naapuri
- University of Helsinki: Helsingin Yliopisto Department of Chemistry FINLAND
| | - Noelia Losada García
- CSIC: Consejo Superior de Investigaciones Cientificas Department of Bocatalysis SPAIN
| | | | | | - Martin H. G. Prechtl
- Universidade de Lisboa Instituto Superior Técnico Av. Rovisco Pais 1 1049-001 Lisbon PORTUGAL
| | - Jose M Palomo
- CSIC: Consejo Superior de Investigaciones Cientificas Department of Biocatalysis c/ Marie Curie 2 28049 Madrid SPAIN
| | - Jan Deska
- University of Helsinki: Helsingin Yliopisto Department of Chemistry A. I. Virtasen aukio 1 00560 Helsinki FINLAND
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Nagore P, Ghotekar S, Mane K, Ghoti A, Bilal M, Roy A. Structural Properties and Antimicrobial Activities of Polyalthia longifolia Leaf Extract-Mediated CuO Nanoparticles. BIONANOSCIENCE 2021. [DOI: 10.1007/s12668-021-00851-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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McWilliams S, Flynn CD, McWilliams J, Arnold DC, Wahyuono RA, Undisz A, Rettenmayr M, Ignaszak A. Nanostructured Cu 2O Synthesized via Bipolar Electrochemistry. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1781. [PMID: 31847448 PMCID: PMC6956072 DOI: 10.3390/nano9121781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/03/2022]
Abstract
Cuprous oxide (Cu2O) was synthesized for the first time via an open bipolar electrochemistry (BPE) approach and characterized in parallel with the commercially available material. As compared to the reference, Cu2O formed through a BPE reaction demonstrated a decrease in particle size; an increase in photocurrent; more efficient light scavenging; and structure-correlated changes in the flat band potential and charge carrier concentration. More importantly, as-synthesized oxides were all phase-pure, defect-free, and had an average crystallite size of 20 nm. Ultimately, this study demonstrates the impact of reaction conditions (e.g., applied potential, reaction time) on structure, morphology, surface chemistry, and photo-electrochemical activity of semiconducting oxides, and at the same time, the ability to maintain a green synthetic protocol and potentially create a scalable product. In the proposed BPE synthesis, we introduced a common food supplement (potassium gluconate) as a reducing and complexing agent, and as an electrolyte, allowing us to replace the more harmful reactants that are conventionally used in Cu2O production. In addition, in the BPE process very corrosive reactants, such as hydroxides and metal precursors (required for synthesis of oxides), are generated in situ in stoichiometric quantity, providing an alternative methodology to generate various nanostructured materials in high yields under mild conditions.
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Affiliation(s)
- Steven McWilliams
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
| | - Connor D. Flynn
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
| | - Jennifer McWilliams
- Department of Psychology, University of New Brunswick, Fredericton, NB E3B 5A3, Canada;
| | - Donna C. Arnold
- School of Physical Sciences, University of Kent, Canterbury CT2 7NH, UK;
| | - Ruri Agung Wahyuono
- Institute for Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität, 07743 Jena, Germany;
| | - Andreas Undisz
- Otto Schott Institute of Materials Research, Chair of Metallic Materials, Friedrich-Schiller-Universität, 07743 Jena, Germany; (A.U.); (M.R.)
| | - Markus Rettenmayr
- Otto Schott Institute of Materials Research, Chair of Metallic Materials, Friedrich-Schiller-Universität, 07743 Jena, Germany; (A.U.); (M.R.)
| | - Anna Ignaszak
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
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Mandal B, Ghosh S, Basu B. Task-Specific Properties and Prospects of Ionic Liquids in Cross-Coupling Reactions. Top Curr Chem (Cham) 2019; 377:30. [PMID: 31628623 DOI: 10.1007/s41061-019-0255-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/01/2019] [Indexed: 11/28/2022]
Abstract
Ionic liquids (ILs) are considered as highly useful materials for potential diverse uses such as greener and more convenient alternatives to volatile organic solvents, reagents, additives, ligands and co-solvents. Thermal stability, negligible vapor pressure and high polarity with ionic environments have possibly conferred some unique physico-chemical properties and a wider electrochemical window on ILs. More importantly, these properties are tuneable, depending on variations in alkyl chains and counter-anions. On the other hand, various transition-metal-catalyzed cross-coupling reactions constitute an important backbone of contemporary organic synthesis. A vast number of C-C and C-heteroatom cross-coupling reactions are reported in the presence of ILs, often showing better performance. The influence of IL on the action of a given catalyst or on the course of a reaction can be relatively complex, and is not understood well enough to be able to draw succinct conclusions. However, there are a few reports in the literature that help understand the role of actual and active catalytic species stabilized in an IL environment. Stabilization, which can be either helpful or detrimental to catalysis depends on specific circumstances. This review article is aimed primarily at summarizing the various applications of ILs during the past decade, focusing as far as possible on the task-specific properties of ILs in transition-metal-catalyzed C-C and C-heteroatom cross-coupling reactions. Several successful achievements and noteworthy progress in this field of research leads to the sensible conclusion that future prospects in this field of research are not only bright but promise new horizons.
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Affiliation(s)
- Bablee Mandal
- Department of Chemistry, Surya Sen College, Siliguri, Darjeeling, 734004, India
| | - Sujit Ghosh
- Department of Chemistry, Surendranath Mahavidyalaya, Raiganj, 733134, India
| | - Basudeb Basu
- Department of Chemistry, North Bengal University, Darjeeling, 734013, India. .,Department of Chemistry, Raiganj University, Raiganj, 733134, India.
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8
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Amal Joseph PJ, Priyadarshini S. Copper-Mediated C–X Functionalization of Aryl Halides. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00285] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- P. J. Amal Joseph
- Department
of Chemistry, St. Albert’s College, Ernakulam, Kerala 682018, India
| | - S. Priyadarshini
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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9
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Eremin DB, Ananikov VP. Understanding active species in catalytic transformations: From molecular catalysis to nanoparticles, leaching, “Cocktails” of catalysts and dynamic systems. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.12.021] [Citation(s) in RCA: 243] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Dang-Bao T, Pradel C, Favier I, Gómez M. Making Copper(0) Nanoparticles in Glycerol: A Straightforward Synthesis for a Multipurpose Catalyst. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700535] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Trung Dang-Bao
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université de Toulouse 3 - Paul Sabatier, UPS and CNRS UMR 5069; 118 Route de Narbonne F-31062 Toulouse Cedex 9 France
| | - Christian Pradel
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université de Toulouse 3 - Paul Sabatier, UPS and CNRS UMR 5069; 118 Route de Narbonne F-31062 Toulouse Cedex 9 France
| | - Isabelle Favier
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université de Toulouse 3 - Paul Sabatier, UPS and CNRS UMR 5069; 118 Route de Narbonne F-31062 Toulouse Cedex 9 France
| | - Montserrat Gómez
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université de Toulouse 3 - Paul Sabatier, UPS and CNRS UMR 5069; 118 Route de Narbonne F-31062 Toulouse Cedex 9 France
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11
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Pike SD, White ER, Regoutz A, Sammy N, Payne DJ, Williams CK, Shaffer MSP. Reversible Redox Cycling of Well-Defined, Ultrasmall Cu/Cu 2O Nanoparticles. ACS NANO 2017; 11:2714-2723. [PMID: 28286946 DOI: 10.1021/acsnano.6b07694] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Exceptionally small and well-defined copper (Cu) and cuprite (Cu2O) nanoparticles (NPs) are synthesized by the reaction of mesitylcopper(I) with either H2 or air, respectively. In the presence of substoichiometric quantities of ligands, namely, stearic or di(octyl)phosphinic acid (0.1-0.2 equiv vs Cu), ultrasmall nanoparticles are prepared with diameters as low as ∼2 nm, soluble in a range of solvents. The solutions of Cu NPs undergo quantitative oxidation, on exposure to air, to form Cu2O NPs. The Cu2O NPs can be reduced back to Cu(0) NPs using accessible temperatures and low pressures of hydrogen (135 °C, 3 bar H2). This striking reversible redox cycling of the discrete, solubilized Cu/Cu(I) colloids was successfully repeated over 10 cycles, representing 19 separate reactions. The ligands influence the evolution of both composition and size of the nanoparticles, during synthesis and redox cycling, as explored in detail using vacuum-transfer aberration-corrected transmission electron microscopy, X-ray photoelectron spectroscopy, and visible spectroscopy.
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Affiliation(s)
- Sebastian D Pike
- Department of Chemistry, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
| | - Edward R White
- Department of Chemistry, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
| | - Anna Regoutz
- Department of Materials, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
| | - Nicholas Sammy
- Department of Chemistry, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
| | - David J Payne
- Department of Materials, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
| | - Charlotte K Williams
- Department of Chemistry, Oxford University, Chemistry Research Laboratory , 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Milo S P Shaffer
- Department of Chemistry, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
- Department of Materials, Imperial College London , Imperial College Road, London SW7 2AZ, U.K
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12
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Gawande MB, Goswami A, Felpin FX, Asefa T, Huang X, Silva R, Zou X, Zboril R, Varma RS. Cu and Cu-Based Nanoparticles: Synthesis and Applications in Catalysis. Chem Rev 2016; 116:3722-811. [DOI: 10.1021/acs.chemrev.5b00482] [Citation(s) in RCA: 1589] [Impact Index Per Article: 198.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Manoj B. Gawande
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, Šlechtitelů
11, 783 71 Olomouc, Czech Republic
| | - Anandarup Goswami
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, Šlechtitelů
11, 783 71 Olomouc, Czech Republic
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
- Department
of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - François-Xavier Felpin
- UFR
Sciences et Techniques, UMR CNRS 6230, Chimie et Interdisciplinarité:
Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes, 2 Rue de la Houssinière, BP 92208, Nantes 44322 Cedex 3, France
| | - Tewodros Asefa
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
- Department
of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Xiaoxi Huang
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Rafael Silva
- Department
of Chemistry, Maringá State University, Avenida Colombo 5790, CEP 87020-900 Maringá, Paraná, Brazil
| | - Xiaoxin Zou
- State
Key
Laboratory of Inorganic Synthesis and Preparative Chemistry, International
Joint Research Laboratory of Nano-Micro Architecture Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Radek Zboril
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, Šlechtitelů
11, 783 71 Olomouc, Czech Republic
| | - Rajender S. Varma
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, Šlechtitelů
11, 783 71 Olomouc, Czech Republic
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13
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Scott M, Deuss PJ, de Vries JG, Prechtl MHG, Barta K. New insights into the catalytic cleavage of the lignin β-O-4 linkage in multifunctional ionic liquid media. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01554e] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solving the lignin β-O-4 cleavage using acidic multifunctional ionic liquid media.
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Affiliation(s)
- Martin Scott
- Stratingh Institute for Chemistry
- Rijksunversiteit Groningen
- Groningen
- The Netherlands
- Department of Chemistry
| | - Peter J. Deuss
- Stratingh Institute for Chemistry
- Rijksunversiteit Groningen
- Groningen
- The Netherlands
| | - Johannes G. de Vries
- Stratingh Institute for Chemistry
- Rijksunversiteit Groningen
- Groningen
- The Netherlands
- Leibniz-Insitut für Katalyse e.V. an der Universität
| | - Martin H. G. Prechtl
- Department of Chemistry
- Institute of Inorganic Chemistry
- University of Cologne
- 50939 Cologne
- Germany
| | - Katalin Barta
- Stratingh Institute for Chemistry
- Rijksunversiteit Groningen
- Groningen
- The Netherlands
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14
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Marcos Esteban R, Meyer H, Kim J, Gemel C, Fischer RA, Janiak C. Comparative Synthesis of Cu and Cu2O Nanoparticles from Different Copper Precursors in an Ionic Liquid or Propylene Carbonate. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500969] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Singh VV, Singh AK. Tetragonal Cu2Se nanoflakes: synthesis using selenated propylamine as Se source and activation of Suzuki and Sonogashira cross coupling reactions. Dalton Trans 2014; 44:725-32. [PMID: 25408175 DOI: 10.1039/c4dt03320e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The metastable tetragonal Cu2Se phase as nanoflakes has been synthesized for the first time by treating CuCl2 taken in a mixture (1:1) of 1-octadecene and oleylamine with H2N-(CH2)3-SePh dissolved in 1-octadecene. Powder X-ray diffraction (PXRD), HRTEM, SEM-EDX and XPS have been used to authenticate the nanoflakes. The XPS of Cu2Se nanoflakes indicates oxidation states of Cu and Se as +1 and -2 respectively. The size of the majority of Cu2Se nanoflakes was found to be between 12 and 14 nm. The nanoflakes have been explored for Suzuki and Sonogashira cross coupling reactions in the presence of TBAB in DMF and DMSO respectively. For Suzuki coupling conversion was found upto ∼86% in 15 h at 110 °C when loading of Cu was 1 mol%. In case of Sonogashira coupling conversion was found upto 82% in 15 h at 160 °C (Cu loading: 1 mol%). The catalytic efficiency of Cu2Se nanoflakes for Suzuki coupling reaction is greater than that for Sonogashira coupling. These nanoflakes have been found reusable for a second time. Most probably TBAB facilitates the release of CuBr from the nanoflakes which catalyze both reactions, as catalytic efficiency is very low in the absence of TBAB and CuBr has been found to activate readily both the coupling reactions. In comparison to many other copper based nano-crystals, the present nanoflakes are a better activator.
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Affiliation(s)
- Ved Vati Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
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17
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Chahdoura F, Pradel C, Gómez M. Copper(I) Oxide Nanoparticles in Glycerol: A Convenient Catalyst for Cross-Coupling and Azide-Alkyne Cycloaddition Processes. ChemCatChem 2014. [DOI: 10.1002/cctc.201402214] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Kessler MT, Hentschel MK, Heinrichs C, Roitsch S, Prechtl MHG. Fast track to nanomaterials: microwave assisted synthesis in ionic liquid media. RSC Adv 2014. [DOI: 10.1039/c3ra47801g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein we present a general approach to metal and metal oxide nanoparticles using simple metal salts as starting materials.
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Affiliation(s)
- Michael T. Kessler
- Department of Chemistry
- Institute of Inorganic Chemistry
- University of Cologne
- 50939 Cologne, Germany
| | - Maria K. Hentschel
- Department of Chemistry
- Institute of Inorganic Chemistry
- University of Cologne
- 50939 Cologne, Germany
| | - Christina Heinrichs
- Department of Chemistry
- Institute of Inorganic Chemistry
- University of Cologne
- 50939 Cologne, Germany
| | - Stefan Roitsch
- Department of Chemistry
- Institute of Physical Chemistry
- University of Cologne
- 50939 Cologne, Germany
| | - Martin H. G. Prechtl
- Department of Chemistry
- Institute of Inorganic Chemistry
- University of Cologne
- 50939 Cologne, Germany
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19
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Yin W, Liu R, He G, Lv W, Zhu H. A highly efficient, ligand-free and recyclable SBA-15 supported Cu2O catalyzed cyanation of aryl iodides with potassium hexacyanoferrate(ii). RSC Adv 2014. [DOI: 10.1039/c4ra05203j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
SBA-15 supported Cu2O nanoparticles (Cu2O/SBA-15) have been fabricated and characterized. The Cu2O/SBA-15 nanoparticles can effectively catalyze cyanation of aryl iodides using non-toxic K4[Fe(CN)6] as a cyanide source.
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Affiliation(s)
- Wenzhu Yin
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing, P. R. China
| | - Rui Liu
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing, P. R. China
| | - Guangke He
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing, P. R. China
| | - Wangjie Lv
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing, P. R. China
| | - Hongjun Zhu
- Department of Applied Chemistry
- College of Science
- Nanjing Tech University
- Nanjing, P. R. China
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