201
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Nishio H, Miura H, Kamata K, Shishido T. Deposition of highly dispersed gold nanoparticles onto metal phosphates by deposition–precipitation with aqueous ammonia. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01627j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Deposition–precipitation with aqueous ammonia enabled small gold nanoparticles to be deposited onto a series of metal phosphates with high dispersity and density.
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Affiliation(s)
- Hidenori Nishio
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hiroki Miura
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-city, Kanagawa, 226-8503, Japan
| | - Tetsuya Shishido
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
- Research Center for Gold Chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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202
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Zhang CB, Yuan JF, Cai YH, Xie YS, Li R, Fan MM, Li JJ. Recyclable Heterogeneous Nanocrystal Promoted Cascade Reaction in Water: An Access to Green Synthesis of Highly Functionalized 4H-Pyrans Containing Phosphonate Motif. HETEROCYCLES 2021. [DOI: 10.3987/com-21-14446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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203
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Galushko AS, Prima DO, Burykina JV, Ananikov VP. Comparative study of aryl halides in Pd-mediated reactions: key factors beyond the oxidative addition step. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01133a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The comparative experimental study of Ar–X (X = Cl, Br, I) reactivity and analysis reported herein suggest that oxidative addition cannot be considered the sole reason of the observed low reactivity of aryl chlorides.
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Affiliation(s)
- Alexey S. Galushko
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - Darya O. Prima
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - Julia V. Burykina
- Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
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204
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Mohammadi Ziarani G, Kheilkordi Z, Mohajer F, Badiei A, Luque R. Magnetically recoverable catalysts for the preparation of pyridine derivatives: an overview. RSC Adv 2021; 11:17456-17477. [PMID: 35479731 PMCID: PMC9033112 DOI: 10.1039/d1ra02418c] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/26/2021] [Indexed: 12/21/2022] Open
Abstract
Magnetically recoverable nano-catalysts can be readily separated from the reaction medium using an external magnet. In recent years, chemistry researchers have employed them as catalysts in chemical reactions. The high surface area, simple preparation, and modification are among their major advantages. Pyridine derivatives are an important category of heterocyclic compounds, which show a wide range of excellent biological activities, including IKK-β inhibitors, anti-microbial agents, A2A adenosine receptor antagonists, inhibitors of HIV-1 integrase, anti-tumor, anti-inflammatory, and anti-Parkinsonism. Recently, the catalytic activity of magnetic nanoparticles was investigated in multicomponent reactions in the synthesis of pyridine derivatives, which is discussed in this review. Magnetically recoverable nano-catalysts can be readily separated from the reaction medium using an external magnet.![]()
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Affiliation(s)
| | - Zohreh Kheilkordi
- Department of Chemistry
- Faculty of Physics and Chemistry
- Alzahra University
- Tehran
- Iran
| | - Fatemeh Mohajer
- Department of Chemistry
- Faculty of Physics and Chemistry
- Alzahra University
- Tehran
- Iran
| | - Alireza Badiei
- School of Chemistry
- College of Science
- University of Tehran
- Tehran
- Iran
| | - Rafael Luque
- Departamento de Quimica Organica
- Universidad de Cordoba
- Campus de Rabanales
- Edificio Marie Curie
- Córdoba
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205
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Cano I, Martínez-Prieto LM, van Leeuwen PWNM. Heterolytic cleavage of dihydrogen (HCD) in metal nanoparticle catalysis. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02399j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Supports, ligands and additives can promote heterolytic H2 splitting by a cooperative mechanism with metal nanoparticles.
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Affiliation(s)
- Israel Cano
- Applied Physics Department
- University of Cantabria
- 39005 Santander
- Spain
| | - Luis M. Martínez-Prieto
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC)
- 46022 Valencia
- Spain
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206
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Liu Y, Lopes RP, Lüdtke T, Di Silvio D, Moya S, Hamon JR, Astruc D. “Click” dendrimer-Pd nanoparticle assemblies as enzyme mimics: catalytic o-phenylenediamine oxidation and application in colorimetric H2O2 detection. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00427a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
“Click” dendrimer-Pd NPs as peroxidase enzyme mimics of H2O2 sensing using o-phenylenediamine oxidation by H2O2 to 2,3-diaminophenazine.
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Affiliation(s)
- Yue Liu
- ISM
- UMR CNRS No 5255
- Univ. Bordeaux
- 33405 Talence Cedex
- France
| | | | - Tanja Lüdtke
- Soft Matter Nanotechnology Lab
- CIC biomaGUNE
- 20014 Donostia-San Sebastián
- Spain
| | - Desire Di Silvio
- Soft Matter Nanotechnology Lab
- CIC biomaGUNE
- 20014 Donostia-San Sebastián
- Spain
| | - Sergio Moya
- Soft Matter Nanotechnology Lab
- CIC biomaGUNE
- 20014 Donostia-San Sebastián
- Spain
| | - Jean-René Hamon
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Didier Astruc
- ISM
- UMR CNRS No 5255
- Univ. Bordeaux
- 33405 Talence Cedex
- France
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207
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Wang YL, Dai YM, Tsai MH. Highly efficient and recyclable Fe3C/Au@NG catalyst for 4-nitrophenol reduction. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2020.106251] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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208
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Burange AS, Ahmad A, Luque R. Electrophilicity in heterogeneous catalysis: role of surface and sub-surface modification. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00613d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface and sub-surface modification can play a significant role in improving the catalytic activity in designed systems.
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Affiliation(s)
| | - Awais Ahmad
- Departamento de Quimica Organica
- Universidad de Cordoba
- E14014 Cordoba
- Spain
| | - Rafael Luque
- Departamento de Quimica Organica
- Universidad de Cordoba
- E14014 Cordoba
- Spain
- Peoples Friendship University of Russia (RUDN University)
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209
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Guo T, Mo K, Zhang N, Xiao L, Liu W, Wen L. Embedded homogeneous ultra-fine Pd nanoparticles within MOF ultra-thin nanosheets for heterogeneous catalysis. Dalton Trans 2021; 50:1774-1779. [DOI: 10.1039/d0dt03877f] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Owing to the synergetic effects of ultra-small Pd NPs and the intrinsic characteristics of two-dimensional supports, the obtained Pd@NMOF-Ni showed high catalytic activity and size-selectivity in olefin hydrogenation with easy recovery.
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Affiliation(s)
- Taolian Guo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Kaili Mo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Nannan Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Lipengcheng Xiao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Wenlong Liu
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Lili Wen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education
- College of Chemistry
- Central China Normal University
- Wuhan
- China
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210
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Hossain MJ, Rahman MS, Sharif MJ. Micromixer: An Effective Tool for the Production of Sub-Nanosized Noble Metal Particles. INTERNATIONAL JOURNAL OF NANOSCIENCE 2020. [DOI: 10.1142/s0219581x20500131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper demonstrates the functionality of a simple and convenient microfluidic method in synthesizing a series of poly(vinylpyrrolidone) (PVP) stabilized nanoparticles (NPs) of various novel metals (Pt, Pd, Ru, Rh, Ag, and Au) with an average diameter of [Formula: see text]2 nm. In this method, the use of microfluidic mixture provided a homogenous mixing of the metal precursors and reducing agent nearly at the molecular level, that yield monodispersed sub-nanosize NPs. Core diameters of the produced NPs determined by transmission electron microscopy (TEM), were [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text][Formula: see text]nm for Pt, Pd, Ru, Rh, Ag and Au NPs, respectively. Of them, Pt NPs were detailed characterized. The obtained Pt NPs were found to have fcc crystal structure with 1.2 nm crystalline size which is very similar to the corresponding TEM result. The efficiency of the synthesis of NPs by micromixer was compared with batch/NaBH4 reduction method for the Pt NPs. It was found that in batch method the as-prepared NPs decreased the reducing ability of NaBH4 by catalytic degradation. In contrast, the micromixer could separate the produced metal NPs from the reaction system soon after the formation of NPs and enables feeding the fresh NaBH4 solution throughout the synthesis. Fourier Transform Infrared (FTIR) spectrometry measurements of adsorbed [Formula: see text]CO molecules on Pt NPs showed that the NPs surface were negatively charged with a high population of edge and vertices atoms.
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Affiliation(s)
- M. Jakir Hossain
- Forest Chemistry Division, Bangladesh Forest Research Institute, Chittagong 4211, Bangladesh
| | - Md Saidur Rahman
- Industrial Botany Research Division, Bangladesh Council of Scientific and Industrial Research, Chittagong, Cittagong-4220, Bangladesh
| | - Md Jafar Sharif
- Department of Chemistry, Military Institute of Science & Technology (MIST), Mirpur, Dhaka-1216, Bangladesh
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211
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Bakhshandeh A, dos Santos AP, Levin Y. Interaction between Charge-Regulated Metal Nanoparticles in an Electrolyte Solution. J Phys Chem B 2020; 124:11762-11770. [DOI: 10.1021/acs.jpcb.0c09446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amin Bakhshandeh
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil
| | - Alexandre P. dos Santos
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil
| | - Yan Levin
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil
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212
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Recent Advances in the Application of Metal–Organic Frameworks for Polymerization and Oligomerization Reactions. Catalysts 2020. [DOI: 10.3390/catal10121441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Polymers have become one of the major types of materials that are essential in our daily life. The controlled synthesis of value-added polymers with unique mechanical and chemical properties have attracted broad research interest. Metal–organic framework (MOF) is a class of porous material with immense structural diversity which offers unique advantages for catalyzing polymerization and oligomerization reactions including the uniformity of the catalytic active site, and the templating effect of the nano-sized channels. We summarized in this review the important recent progress in the field of MOF-catalyzed and MOF-templated polymerizations, to reveal the chemical principle and structural aspects of these systems and hope to inspire the future design of novel polymerization systems with improved activity and specificity.
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213
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Arkhipova DM, Ermolaev VV, Miluykov VA, Gubaidullin AT, Islamov DR, Kataeva ON, Ananikov VP. Sterically Hindered Phosphonium Salts: Structure, Properties and Palladium Nanoparticle Stabilization. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2457. [PMID: 33316907 PMCID: PMC7763823 DOI: 10.3390/nano10122457] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/01/2020] [Accepted: 12/04/2020] [Indexed: 01/06/2023]
Abstract
A new family of sterically hindered alkyl(tri-tert-butyl) phosphonium salts (n-CnH2n+1 with n = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20) was synthesized and evaluated as stabilizers for the formation of palladium nanoparticles (PdNPs), and the prepared PdNPs, stabilized by a series of phosphonium salts, were applied as catalysts of the Suzuki cross-coupling reaction. All investigated phosphonium salts were found to be excellent stabilizers of metal nanoparticles of small catalytically active size with a narrow size distribution. In addition, palladium nanoparticles exhibited exceptional stability: the presence of phosphonium salts prevented agglomeration and precipitation during the catalytic reaction.
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Affiliation(s)
- Daria M Arkhipova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect, 47, 119991 Moscow, Russia
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Vadim V Ermolaev
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Vasily A Miluykov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Aidar T Gubaidullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Daut R Islamov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Olga N Kataeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbusov Street 8, 420088 Kazan, Russia
| | - Valentine P Ananikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect, 47, 119991 Moscow, Russia
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214
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215
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Draz MS, Vasan A, Muthupandian A, Kanakasabapathy MK, Thirumalaraju P, Sreeram A, Krishnakumar S, Yogesh V, Lin W, Yu XG, Chung RT, Shafiee H. Virus detection using nanoparticles and deep neural network-enabled smartphone system. SCIENCE ADVANCES 2020; 6:eabd5354. [PMID: 33328239 PMCID: PMC7744080 DOI: 10.1126/sciadv.abd5354] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 11/02/2020] [Indexed: 05/02/2023]
Abstract
Emerging and reemerging infections present an ever-increasing challenge to global health. Here, we report a nanoparticle-enabled smartphone (NES) system for rapid and sensitive virus detection. The virus is captured on a microchip and labeled with specifically designed platinum nanoprobes to induce gas bubble formation in the presence of hydrogen peroxide. The formed bubbles are controlled to make distinct visual patterns, allowing simple and sensitive virus detection using a convolutional neural network (CNN)-enabled smartphone system and without using any optical hardware smartphone attachment. We evaluated the developed CNN-NES for testing viruses such as hepatitis B virus (HBV), HCV, and Zika virus (ZIKV). The CNN-NES was tested with 134 ZIKV- and HBV-spiked and ZIKV- and HCV-infected patient plasma/serum samples. The sensitivity of the system in qualitatively detecting viral-infected samples with a clinically relevant virus concentration threshold of 250 copies/ml was 98.97% with a confidence interval of 94.39 to 99.97%.
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Affiliation(s)
- Mohamed S Draz
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Anish Vasan
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Aradana Muthupandian
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Manoj Kumar Kanakasabapathy
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Prudhvi Thirumalaraju
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Aparna Sreeram
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Sanchana Krishnakumar
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Vinish Yogesh
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Wenyu Lin
- Liver Center, Gastrointestinal Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Xu G Yu
- Division of Infectious Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
- The Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Boston, MA 02129, USA
| | - Raymond T Chung
- Harvard Medical School, Boston, MA 02115, USA
- Liver Center, Gastrointestinal Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hadi Shafiee
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA.
- Harvard Medical School, Boston, MA 02115, USA
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216
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Zeng M, Lou C, Xue J, Jiang H, Li K, Chen Z, Fu S, Yin G. Palladium (II)‐catalyzed homogeneous alcohol oxidations: Disclosing the crucial contribution of palladium nanoparticles in catalysis. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Miao Zeng
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Chenlin Lou
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Jing‐Wen Xue
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Hongwu Jiang
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Kaiwen Li
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Zhuqi Chen
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Shitao Fu
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Guochuan Yin
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
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217
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Albert SK, Golla M, Krishnan N, Perumal D, Varghese R. DNA-π Amphiphiles: A Unique Building Block for the Crafting of DNA-Decorated Unilamellar Nanostructures. Acc Chem Res 2020; 53:2668-2679. [PMID: 33052654 DOI: 10.1021/acs.accounts.0c00492] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The unparalleled ability of DNA to recognize its complementary strand through Watson and Crick base pairing is one of the most reliable molecular recognition events found in natural systems. This highly specific sequence information encoded in DNA enables it to be a versatile building block for bottom-up self-assembly. Hence, the decoration of functional nanostructures with information-rich DNA is extremely important as this allows the integration of other functional molecules onto the surface of the nanostructures through DNA hybridization in a highly predictable manner. DNA amphiphiles are a class of molecular hybrids where a short hydrophilic DNA is conjugated to a hydrophobic moiety. Since DNA amphiphiles comprise DNA as the hydrophilic segment, their self-assembly in aqueous medium always results in the formation of nanostructures with shell made of DNA. This clearly suggests that self-assembly of DNA amphiphiles is a straightforward strategy for the ultradense decoration of a nanostructure with DNA. However, initial attempts toward the design of DNA amphiphiles were primarily focused on long flexible hydrocarbon chains as the hydrophobic moiety, and it has been demonstrated in several examples that they typically self-assemble into DNA-decorated micelles (spherical or cylindrical). Hence, molecular level control over the self-assembly of DNA amphiphiles and achieving diverse morphologies was extremely challenging and unrealized until recently.In this Account, we summarize our recent efforts in the area of self-assembly of DNA amphiphiles and narrate the remarkable effect of the incorporation of a large π-surface as the hydrophobic domain in the self-assembly of DNA amphiphiles. Self-assembly of DNA amphiphiles with flexible hydrocarbon chains as the hydrophobic moiety is primarily driven by the hydrophobic effect. The morphology of such nanostructures is typically predicted based on the volume ratio of hydrophobic to hydrophilic segments. However, control over the self-assembly and prediction of the morphology become increasingly challenging when the hydrophobic moieties can interact with each other through other noncovalent interactions. In this Account, the unique self-assembly behaviors of DNA-π amphiphiles, where a large π-surface acts as the hydrophobe, are described. Due to the extremely strong π-π stacking in aqueous medium, the assembly of the amphiphile is found to preferably proceed in a lamellar fashion (bilayer) and hence the morphology of the nanostructures can easily be tuned by the structural modification of the π-surface. Design principles for crafting various DNA-decorated lamellar nanostructures including unilamellar vesicles, two-dimensional (2D) nanosheets, and helically twisted nanoribbons by selecting suitable π-surfaces are discussed. Unilamellar vesicular nanostructures were achieved by using linear oligo(phenylene ethynylene) (OPE) as the hydrophobic segment, where lamellar assembly undergoes folding to form unilamellar vesicles. The replacement of OPE with a strongly π-stacking hydrophobe such as hexabenzocoronene (HBC) or tetraphenylethylene (TPE) provides extremely strong π-stacking compared to OPE, which efficiently directed the 2D growth for the lamellar assembly and led to the formation of 2D nanosheets. A helical twist in the lamella was achieved by the replacement of HBC with hexaphenylbenzene (HPB), which is the twisted analogue of HBC, directing the assembly into helically twisted nanoribbons. The most beneficial structural feature of this kind of nanostructure is the extremely dense decoration of their surface with ssDNA, which can further be used for DNA-directed organization of other functional nanomaterials. By exploring this, their potential as a nanoscaffold for predefined assembly of plasmonic nanomaterials into various plasmonic 1D, 2D, and 3D nanostructures through DNA hybridization is discussed. Moreover, the design of pH-responsive DNA-based vesicles and their application as a nanocarrier for payload delivery is also demonstrated.
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Affiliation(s)
- Shine K. Albert
- School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum, 695551 Kerala, India
| | - Murali Golla
- School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum, 695551 Kerala, India
| | - Nthiyanandan Krishnan
- School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum, 695551 Kerala, India
| | - Devanathan Perumal
- School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum, 695551 Kerala, India
| | - Reji Varghese
- School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum, 695551 Kerala, India
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218
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Kaeffer N, Mance D, Copéret C. N‐Heterocyclic Carbene Coordination to Surface Copper Sites in Selective Semihydrogenation Catalysts from Solid‐State NMR Spectroscopy. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Nicolas Kaeffer
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim a. d. Ruhr Germany
| | - Deni Mance
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Christophe Copéret
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
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219
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Yang S, Hong SH. Palladium‐Catalyzed Direct C−H Arylation of Arenes Promoted by Quaternary Ammonium Salt. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000443] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sabyuk Yang
- Department of Chemistry, College of Natural Sciences Seoul National University Seoul 08826 Republic of Korea
| | - Soon Hyeok Hong
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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220
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Rhodium Nanoparticles Stabilized by PEG-Tagged Imidazolium Salts as Recyclable Catalysts for the Hydrosilylation of Internal Alkynes and the Reduction of Nitroarenes. Catalysts 2020. [DOI: 10.3390/catal10101195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
PEGylated imidazolium (bromide and tetrafluoroborate) and tris-imidazolium (bromide) salts containing triazole linkers have been used as stabilizers for the preparation of water-soluble rhodium(0) nanoparticles by reduction of rhodium trichloride with sodium borohydride in water at room temperature. The nanomaterials have been characterized (Transmission Electron Microscopy, Electron Diffraction, X-ray Photoelectron Spectroscopy, Inductively Coupled Plasma-Optical Emission Spectroscopy). They proved to be efficient and recyclable catalysts for the stereoselective hydrosilylation of internal alkynes, in the presence or absence of solvent, and in the reduction of nitroarenes to anilines with ammonia-borane as hydrogen donor in aqueous medium (1:4 tetrahydrofuran/water).
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221
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Huang W, Huber N, Jiang S, Landfester K, Zhang KAI. Covalent Triazine Framework Nanoparticles via Size-Controllable Confinement Synthesis for Enhanced Visible-Light Photoredox Catalysis. Angew Chem Int Ed Engl 2020; 59:18368-18373. [PMID: 32697384 PMCID: PMC7590189 DOI: 10.1002/anie.202007358] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/13/2020] [Indexed: 01/22/2023]
Abstract
For metal-free, organic conjugated polymer-based photocatalysts, synthesis of defined nanostructures is still highly challenging. Here, we report the formation of covalent triazine framework (CTF) nanoparticles via a size-controllable confined polymerization strategy. The uniform CTF nanoparticles exhibited significantly enhanced activity in the photocatalytic formation of dibenzofurans compared to the irregular bulk material. The optoelectronic properties of the nanometer-sized CTFs could be easily tuned by copolymerizing small amounts of benzothiadiazole into the conjugated molecular network. This optimization of electronic properties led to a further increase in observed photocatalytic efficiency, resulting in total an 18-fold enhancement compared to the bulk material. Full recyclability of the heterogeneous photocatalysts as well as catalytic activity in dehalogenation, hydroxylation and benzoimidazole formation reactions demonstrated the utility of the designed materials.
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Affiliation(s)
- Wei Huang
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Niklas Huber
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Shuai Jiang
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | | | - Kai A. I. Zhang
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
- Department of Materials ScienceFudan University200433ShanghaiP. R. China
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222
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Poly (N-Vinyl caprolactam), a thermal responsive support with tunable phase transition temperature for catalyst. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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223
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Synthesis of nanosized TiO2 using different molecular weight polyethylene glycol (PEG) as capping agent and their performance as photoanode in dye-sensitized solar cells. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04768-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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224
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Rani S, Dilbaghi N, Kumar S, Varma RS, Malhotra R. Rapid redox sensing of p-nitrotoluene in real water samples using silver nanoparticles. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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225
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Khaleghi Abbasabadi M, Azarifar D, Esmaili Zand HR. Sulfonic acid‐functionalized Fe
3
O
4
‐supported magnetized graphene oxide quantum dots: A novel organic‐inorganic nanocomposite as an efficient and recyclable nanocatalyst for the synthesis of dihydropyrano[2,3‐
c
]pyrazole and 4
H
‐chromene derivatives. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
| | - Davood Azarifar
- Department of Chemistry Bu‐Ali Sina University Hamedan 65178 Iran
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226
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Huang W, Huber N, Jiang S, Landfester K, Zhang KAI. Covalent Triazine Framework Nanoparticles via Size‐Controllable Confinement Synthesis for Enhanced Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wei Huang
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Niklas Huber
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Shuai Jiang
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | | | - Kai A. I. Zhang
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
- Department of Materials Science Fudan University 200433 Shanghai P. R. China
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227
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Biswas S, Pal A, Pal T. Supported metal and metal oxide particles with proximity effect for catalysis. RSC Adv 2020; 10:35449-35472. [PMID: 35515660 PMCID: PMC9056907 DOI: 10.1039/d0ra06168a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/08/2020] [Indexed: 11/21/2022] Open
Abstract
External influence is essential for any change to occur in this world. Similarly, the reaction path of a chemical reaction can be changed with the addition of a catalyst from outside. Sometimes a catalyst performs better when it remains associated with an inert substance, which is called a support material (SM). Improved catalyst accomplishment arises from the 'proximity effect'. Even inert supports play a role in better product formulation or environmental remediation. In this review, it has been shown how the SM, as a nest, aids the catalyst particle synergistically to perform a good job in a chemical reaction. The structure-function relationship of SM helps in catalyst activation to some extent, and produces active centres that are difficult to fully ascertain. In the text, Langmuir-Hinshelwood (L-H), Mars-van Krevelen (MVK), and Eley-Rideal (E-R) mechanisms are highlighted for the adsorption processes as the case may be. Again, the importance of SM for both catalyst and substrates has been consolidated here in the text. Finally, the role of the initiator and the promoter is also discussed in this review.
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Affiliation(s)
- Subhadeep Biswas
- Department of Civil Engineering, Indian Institute of Technology Kharagpur 721302 India
| | - Anjali Pal
- Department of Civil Engineering, Indian Institute of Technology Kharagpur 721302 India
| | - Tarasankar Pal
- Department of Chemical Sciences, University of Johannesburg Auckland Park South Africa
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228
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Akiyama T, Wada Y, Yamada M, Shio Y, Honma T, Shimoda S, Tsuruta K, Tamenori Y, Haneoka H, Suzuki T, Harada K, Tsurugi H, Mashima K, Hasegawa JY, Sato Y, Arisawa M. Self-Assembled Multilayer Iron(0) Nanoparticle Catalyst for Ligand-Free Carbon-Carbon/Carbon-Nitrogen Bond-Forming Reactions. Org Lett 2020; 22:7244-7249. [PMID: 32903001 DOI: 10.1021/acs.orglett.0c02574] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Self-assembled multilayer iron(0) nanoparticles (NPs, 6-10 nm), namely, sulfur-modified Au-supported Fe(0) [SAFe(0)], were developed for ligand-free one-pot carbon-carbon/carbon-nitrogen bond-forming reactions. SAFe(0) was successfully prepared using a well-established metal-nanoparticle catalyst preparative protocol by simultaneous in situ metal NP and nanospace organization (PSSO) with 1,4-bis(trimethylsilyl)-1,4-dihydropyrazine (Si-DHP) as a strong reducing agent. SAFe(0) was easy to handle in air and could be recycled with a low iron-leaching rate in reaction cycles.
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Affiliation(s)
- Toshiki Akiyama
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Yuki Wada
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Makito Yamada
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Yasunori Shio
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Tetsuo Honma
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Shuhei Shimoda
- Institute for Catalysis, Hokkaido University, Kita-21, Nishi-10, Kita-ku, Sapporo 001-0021, Japan
| | - Kazuki Tsuruta
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Hitoshi Haneoka
- The Institute of Scientific and Industrial Research, Osaka University, Mihoga-oka, Ibaraki, Osaka 567-0047, Japan
| | - Takeyuki Suzuki
- The Institute of Scientific and Industrial Research, Osaka University, Mihoga-oka, Ibaraki, Osaka 567-0047, Japan
| | - Kazuo Harada
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Hayato Tsurugi
- Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan
| | - Jun-Ya Hasegawa
- Institute for Catalysis, Hokkaido University, Kita-21, Nishi-10, Kita-ku, Sapporo 001-0021, Japan
| | - Yoshihiro Sato
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Mitsuhiro Arisawa
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
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229
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Chen M, Gao Y, Fu B, Yang F. A Tandem Adsorption-Catalysis Strategy for the Removal of Copper Ions and Catalytic Reduction of 4-Nitrophenol. ACS OMEGA 2020; 5:23372-23377. [PMID: 32954189 PMCID: PMC7496003 DOI: 10.1021/acsomega.0c03329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
In this work, a consecutive adsorption-catalysis approach to remove Cu2+ ions and catalytic reduction of 4-nitrophenol (4-NP) is proposed. Attapulgite (ATP) nanorods are utilized as adsorbents to enrich Cu2+ ions from contaminated water. Subsequently, the adsorbed ions were in situ reduced to construct Cu-loaded ATP catalysts. The catalytic activities of the composite ATP-Cu catalysts are evaluated by 4-NP reduction in the presence of NaBH4. The optimal ATP-Cu50 sample prepared by putting ATP into a 50 mg L-1 CuSO4 solution could complete the catalytic reaction within 4 min. Moreover, the Cu-deposited ATP nanorods can be integrated into a continuous flow catalytic system, and the 4-NP can be rapidly reduced. This method sheds lights on the fabrication of ATP-based hybrid catalysts and the removal of multiple water pollutants.
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Affiliation(s)
- Muhua Chen
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Yingyun Gao
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Bo Fu
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Fan Yang
- School
of Management Science and Engineering, Nanjing
University of Finance and Economics, Nanjing, Jiangsu 210023, China
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230
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Jang W, Yun J, Ludwig L, Jang SG, Bae JY, Byun H, Kim JH. Comparative Catalytic Properties of Supported and Encapsulated Gold Nanoparticles in Homocoupling Reactions. Front Chem 2020; 8:834. [PMID: 33195039 PMCID: PMC7533535 DOI: 10.3389/fchem.2020.00834] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 08/10/2020] [Indexed: 11/13/2022] Open
Abstract
This report describes strategies to increase the reactive surfaces of integrated gold nanoparticles (AuNPs) by employing two different types of host materials that do not possess strong electrostatic and/or covalent interactive forces. These composite particles are then utilized as highly reactive and recyclable quasi-homogeneous catalysts in a C-C bond forming reaction. The use of mesoporous TiO2 and poly(N-isopropylacrylamide), PNIPAM, particles allows for the formation of relatively small and large guest AuNPs and provides the greatly improved stability of the resulting composite particles. As these AuNPs are physically incorporated into the mesoporous TiO2 (i.e., supported AuNPs) and PNIPAM particles (i.e., encapsulated AuNPs), their surfaces are maximized to serve as highly reactive catalytic sites. Given their increased physicochemical properties (e.g., stability, dispersity, and surface area), these composite particles exhibit notably high catalytic activity, selectivity, and recyclability in the homocoupling of phenylboronic acid in water and EtOH. Although the small supported AuNPs display slightly faster reaction rates than the large encapsulated AuNPs, the apparent activation energies (Ea) of both composite particles are comparable, implying no obvious correlation with the size of guest AuNPs under the reaction conditions. Investigating the overall physical properties of various composite particles and their catalytic functions, including the reactivity, selectivity, and Ea, can lead to the development of highly practical quasi-homogeneous catalysts in green reaction conditions.
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Affiliation(s)
- Wongi Jang
- Department of Chemistry, Illinois State University, Normal, IL, United States.,Department of Chemical Engineering, Keimyung University, Daegu, South Korea.,Department of Energy Engineering, Dankook University, Cheonan, South Korea
| | - Jaehan Yun
- Department of Chemistry, Illinois State University, Normal, IL, United States.,Department of Chemical Engineering, Keimyung University, Daegu, South Korea
| | - Luke Ludwig
- Department of Chemistry, Illinois State University, Normal, IL, United States
| | - Su Guan Jang
- Department of Chemistry, Keimyung University, Daegu, South Korea
| | - Jae Young Bae
- Department of Chemistry, Keimyung University, Daegu, South Korea
| | - Hongsik Byun
- Department of Chemical Engineering, Keimyung University, Daegu, South Korea
| | - Jun-Hyun Kim
- Department of Chemistry, Illinois State University, Normal, IL, United States
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231
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Mohajer F, Mohammadi Ziarani G, Badiei A. Decorated palladium nanoparticles on mesoporous organosilicate as an efficient catalyst for Sonogashira coupling reaction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-02044-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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232
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233
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Kani I, Unver H. Bimetallic Ni(II) complex with carboxylate bridging for homogeneous hydrogenation of alkenes with NaBH4. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114649] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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234
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Kaeffer N, Mance D, Copéret C. N‐Heterocyclic Carbene Coordination to Surface Copper Sites in Selective Semihydrogenation Catalysts from Solid‐State NMR Spectroscopy. Angew Chem Int Ed Engl 2020; 59:19999-20007. [DOI: 10.1002/anie.202006209] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/16/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Nicolas Kaeffer
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim a. d. Ruhr Germany
| | - Deni Mance
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Christophe Copéret
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
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235
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The synthesis of SBA-Pr-3AP@Pd and its application as a highly dynamic, eco-friendly heterogeneous catalyst for Suzuki–Miyaura cross-coupling reaction. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04218-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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236
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Jiang Y, Weiss EA. Colloidal Quantum Dots as Photocatalysts for Triplet Excited State Reactions of Organic Molecules. J Am Chem Soc 2020; 142:15219-15229. [DOI: 10.1021/jacs.0c07421] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yishu Jiang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Emily A. Weiss
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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237
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Chopra J, Goswami AK, Baroliya PK. An Overview of Solid Supported Palladium and Nickel Catalysts for C-C Cross Coupling Reactions. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x16666190617160339] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Solid supported catalysts have been of considerable interest in organic synthesis for the
last few years. Solid support provides an efficient heterogeneous catalytic system owing to facile
recovery and extensive recycling by simple filtration because of possessing 3-R approach (Recoverable,
Robust and Recyclable) and makes solid supported catalyst more appealing nowadays. In view
of the high cost and shortage of furthermost used palladium catalyst, its recovery and recycling are
vital issues for any large-scale application which are being overcome by using solid supported
catalytic systems. Therefore, a variety of inorganic and organic solid-supported catalytic systems
have been developed so far in order to address these challenges. This review attempts highlight a
number of solid supported catalytic systems in the pro-active area of widely used C-C cross coupling
reactions.
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Affiliation(s)
- Jaishri Chopra
- Coordination Chemistry Lab, Department of Chemistry, Mohanlal Sukhadia University, Udaipur (Rajasthan) - 313001, India
| | - Ajay K. Goswami
- Coordination Chemistry Lab, Department of Chemistry, Mohanlal Sukhadia University, Udaipur (Rajasthan) - 313001, India
| | - Prabhat K. Baroliya
- Coordination Chemistry Lab, Department of Chemistry, Mohanlal Sukhadia University, Udaipur (Rajasthan) - 313001, India
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238
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Das T, Singha D, Nandi M. The big effect of a small change: formation of CuO nanoparticles instead of covalently bound Cu(ii) over functionalized mesoporous silica and its impact on catalytic efficiency. Dalton Trans 2020; 49:10138-10155. [PMID: 32662469 DOI: 10.1039/d0dt01922d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Two different heterogeneous catalysts, one with Cu(ii) covalently bonded to functionalized mesoporous silica (FMS-Cu(II)) and another with CuO nanoparticles immobilized over the same silica (FMS-CuO-np), have been synthesized by a common route but with a minor alteration in the sequence of addition of reagents. It is interesting to find that by merely changing the order of the addition of reagents Cu(ii) can be incorporated into the framework in two different forms. In one case Cu(ii) binds to the N and O donor centers present in the functionalized material whereas in the other case CuO nanoparticles are generated in situ. The materials have been thoroughly characterized by powder X-ray diffraction, nitrogen adsorption/desorption, transmission electron microscopy, thermal analysis, FT-IR spectroscopy, solid state MAS-NMR spectroscopy and atomic absorption spectrophotometric studies. The synthesized products have been examined for their catalytic efficiencies in the oxidation of olefins, as a model case. Styrene, α-methyl styrene, cyclohexene, trans-stilbene and cyclooctene have been used as substrates in the presence of tert-butyl hydroperoxide as the oxidant in acetonitrile medium under mild conditions. The products of the catalytic reactions have been identified and estimated by gas chromatography and gas chromatography-mass spectrometry. The rate of conversion of the substrates for both the catalysts is high and the selectivity is also good. But from comparative studies, it is found that FMS-CuO-np which contains CuO nanoparticles shows better efficiency than FMS-Cu(II). The catalysts have been recycled for five catalytic cycles without showing much decrease in their catalytic activity.
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Affiliation(s)
- Trisha Das
- Integrated Science Education and Research Centre, Siksha Bhavana, Visva-Bharati University, Santiniketan 731 235, India.
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239
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Wang Y, Cao X, Zhao L, Pi C, Ji J, Cui X, Wu Y. Generalized Chemoselective Transfer Hydrogenation/Hydrodeuteration. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000759] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yong Wang
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Xinyi Cao
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Leyao Zhao
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Chao Pi
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Jingfei Ji
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Xiuling Cui
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Yangjie Wu
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
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240
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Malinowski J, Zych D, Jacewicz D, Gawdzik B, Drzeżdżon J. Application of Coordination Compounds with Transition Metal Ions in the Chemical Industry-A Review. Int J Mol Sci 2020; 21:ijms21155443. [PMID: 32751682 PMCID: PMC7432526 DOI: 10.3390/ijms21155443] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 12/31/2022] Open
Abstract
This publication presents the new trends and opportunities for further development of coordination compounds used in the chemical industry. The review describes the influence of various physicochemical factors regarding the coordination relationship (for example, steric hindrance, electron density, complex geometry, ligand), which condition technological processes. Coordination compounds are catalysts in technological processes used during organic synthesis, for example: Oxidation reactions, hydroformylation process, hydrogenation reaction, hydrocyanation process. In this article, we pointed out the possibilities of using complex compounds in catalysis, and we noticed what further research should be undertaken for this purpose.
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Affiliation(s)
- Jacek Malinowski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (J.M.); (D.Z.); (D.J.); (J.D.)
| | - Dominika Zych
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (J.M.); (D.Z.); (D.J.); (J.D.)
| | - Dagmara Jacewicz
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (J.M.); (D.Z.); (D.J.); (J.D.)
| | - Barbara Gawdzik
- Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15 G, 25-406 Kielce, Poland
- Correspondence: ; Tel.: +48-41-349-70-16
| | - Joanna Drzeżdżon
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (J.M.); (D.Z.); (D.J.); (J.D.)
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241
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Centomo P, Zecca M, Biffis A. Cross-Linked Polymers as Scaffolds for the Low-Temperature Preparation of Nanostructured Metal Oxides. Chemistry 2020; 26:9243-9260. [PMID: 32357276 DOI: 10.1002/chem.202000815] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 12/22/2022]
Abstract
The current state of the art of the use of cross-linked organic polymers, both insoluble (resins or gels) and soluble (micro- and nanogels), as aids for the low-temperature preparation of stable metal oxide nanoparticles or nanostructured metal oxides is reviewed herein. Synthetic strategies for inorganic oxide nanomaterials of this kind can greatly benefit from the use of cross-linked polymers, which may act as scaffolds/exotemplates during inorganic nanoparticle synthesis, or as stabilizers following post-synthetic modification of the nanoparticles. Furthermore, the peculiar properties of the organic cross-linked polymers add to those of the inorganic oxide nanoparticles, producing materials with combined properties. The potential applications of such highly promising composite nanomaterials will be also briefly sketched.
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Affiliation(s)
- Paolo Centomo
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Marco Zecca
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Andrea Biffis
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
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242
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Dziike F, Franklyn PJ, Hlekelele L, Durbach S. Recovery of waste gold for the synthesis of gold nanoparticles supported on radially aligned nanorutile: the growth of carbon nanomaterials. RSC Adv 2020; 10:28090-28099. [PMID: 35519089 PMCID: PMC9055640 DOI: 10.1039/d0ra03797d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/08/2020] [Indexed: 11/21/2022] Open
Abstract
Precious and expensive metals are lost each year through the discarding of old jewellery pieces and mine tailings. In this work, small amounts of gold were recovered by digestion with aqua regia from waste tailings. The recovered gold in the form of HAuCl4 was then used to deposit Au0 onto radially aligned nanorutile (RANR) to form a supported catalyst material. The support material, RANR, was synthesized using the hydrothermal technique whereas the deposition of gold was achieved using the deposition–precipitation with urea method at various loadings. Electron microscopy was used to show that the structure of the support is a sphere formed by multiple nanorods aligned in a radial structure. The Au nanoparticles were observed at the tips of the nanorods. It was confirmed by XRD that the support was indeed a rutile phase of TiO2 and that the Au nanoparticles had a face-centred cubic structure. The various catalysts were then used to synthesize carbon nanomaterials (CNMs) using the chemical vapour deposition technique. A parametric study varying the reaction temperature, duration and carbon source gas flow rate was conducted to study the effects these conditions have on the structural properties of the resulting CNMs. Here, it was found that mainly carbon nanofibers were formed and that the different reaction conditions influenced their graphicity, width, structure and thermal properties. A hydrothermal method was used to prepare rutile TiO2 dandelions. A deposition–precipitation method using urea (DPU) was used to load Au metal nanoparticles in calculated weight percentages and the Au/RANR catalysts where used to synthesise CNFs in a CVD reaction.![]()
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Affiliation(s)
- Farai Dziike
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand Johannesburg 2050 South Africa .,DST-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS 2050 Johannesburg South Africa
| | - Paul J Franklyn
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand Johannesburg 2050 South Africa
| | - Lerato Hlekelele
- Polymers and Composites, Materials and Manufacturing Science, CSIR Pretoria 0001 South Africa
| | - Shane Durbach
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand Johannesburg 2050 South Africa .,DST-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS 2050 Johannesburg South Africa
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243
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244
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Efficient and straightforward access to diverse and densely functionalized chromenes by 3-amino-1,2,4-triazole supported on hydroxyapatite-encapsulated- γ-Fe2O3 (γ-Fe2O3@HAp@CPTMS@AT) as a new magnetic basic nanocatalyst. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01825-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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245
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In situ preparation of palladium nanoparticles in ionic liquid crystal microemulsion and their application in Heck reaction. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113241] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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246
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Akbari A, Dekamin MG, Yaghoubi A, Naimi-Jamal MR. Novel magnetic propylsulfonic acid-anchored isocyanurate-based periodic mesoporous organosilica (Iron oxide@PMO-ICS-PrSO 3H) as a highly efficient and reusable nanoreactor for the sustainable synthesis of imidazopyrimidine derivatives. Sci Rep 2020; 10:10646. [PMID: 32606381 PMCID: PMC7327082 DOI: 10.1038/s41598-020-67592-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/11/2020] [Indexed: 11/30/2022] Open
Abstract
In this study, preparation and characterization of a new magnetic propylsulfonic acid-anchored isocyanurate bridging periodic mesoporous organosilica (Iron oxide@PMO-ICS-PrSO3H) is described. The iron oxide@PMO-ICS-PrSO3H nanomaterials were characterized by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy and field emission scanning electron microscopy as well as thermogravimetric analysis, N2 adsorption-desorption isotherms and vibrating sample magnetometer techniques. Indeed, the new obtained materials are the first example of the magnetic thermally stable isocyanurate-based mesoporous organosilica solid acid. Furthermore, the catalytic activity of the Iron oxide@PMO-ICS-PrSO3H nanomaterials, as a novel and highly efficient recoverable nanoreactor, was investigated for the sustainable heteroannulation synthesis of imidazopyrimidine derivatives through the Traube-Schwarz multicomponent reaction of 2-aminobenzoimidazole, C‒H acids and diverse aromatic aldehydes. The advantages of this green protocol are low catalyst loading, high to quantitative yields, short reaction times and the catalyst recyclability for at least four consecutive runs.
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Affiliation(s)
- Arezoo Akbari
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 1684613114, Iran
| | - Mohammad G Dekamin
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 1684613114, Iran.
| | - Amene Yaghoubi
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 1684613114, Iran
| | - Mohammad Reza Naimi-Jamal
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 1684613114, Iran
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247
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Liu JL, Jiang B, Han GZ. Recent Developments on Noble Metal Based Microparticles for Their Applications in Organic Catalysis. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200427080644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Noble metal microparticles have been employed as desired catalysts for a number
of classical organic chemical reactions due to their unique physicochemical properties.
Currently, in order to obtain more benefits for practical applications such as low cost, easy
separation and high selectivity, many efforts of scientists are devoted to constructing composite
microparticles in which noble metals are coupled with other materials. In this paper,
we summarize some recent research developments on noble metal based microparticles for
their catalytic applications in organic synthesis. Among them, application of the gold and
silver based microparticles is the focus of this paper for their relatively low cost and the
diversity of preparation methods. Furthermore, the challenges and prospects of noble metal
based microparticles for their applications in organic catalysis are also discussed.
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Affiliation(s)
- Jian-Long Liu
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Bo Jiang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Guo-Zhi Han
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
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248
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Ahmad MS, Nishina Y. Graphene-based carbocatalysts for carbon-carbon bond formation. NANOSCALE 2020; 12:12210-12227. [PMID: 32510079 DOI: 10.1039/d0nr02984j] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic transformations are usually catalyzed by metal-based catalysts. In contrast, metal-free catalysts have attracted considerable attention from the viewpoint of sustainability and safety. Among the studies in metal-free catalysis, graphene-based materials have been introduced in the reactions that are usually catalyzed by transition metal catalysts. This review covers the literature (up to the beginning of April 2020) on the use of graphene and its derivatives as carbocatalysts for C-C bond-forming reactions, which are one of the fundamental reactions in organic syntheses. Besides, mechanistic studies are included for the rational understanding of the catalysis. Graphene has significant potential in the field of metal-free catalysis because of the fine-tunable potential of the structure, high stability and durability, and no metal contamination, making it a next-generation candidate material in catalysis.
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Affiliation(s)
- Muhammad Sohail Ahmad
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, Japan700-8530.
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249
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Heravi MM, Asadi S, Hoseini Chopani SM, Jaderi E. N
‐Heterocyclic Carbene–Palladium Complex onto Graphene Oxide and Poly (ethylene glycol) (PEG) Applied as Superior Catalyst for the Suzuki‐Miyaura Cross‐Coupling Reaction in Water. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5805] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Majid M. Heravi
- Faculty of Chemistry and Physics, Department of ChemistryAlzahra University Vanak Tehran Iran
| | - Shima Asadi
- Faculty of Chemistry and Physics, Department of ChemistryAlzahra University Vanak Tehran Iran
| | | | - Elham Jaderi
- Faculty of Chemistry and Physics, Department of ChemistryAlzahra University Vanak Tehran Iran
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250
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Kathuria L, Din Reshi NU, Samuelson AG. N-Heterocyclic Carbene (NHC)-Stabilized Ru 0 Nanoparticles: In Situ Generation of an Efficient Transfer Hydrogenation Catalyst. Chemistry 2020; 26:7622-7630. [PMID: 32048353 DOI: 10.1002/chem.202000142] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Indexed: 11/06/2022]
Abstract
Tethered and untethered ruthenium half-sandwich complexes were synthesized and characterized spectroscopically. X-ray crystallographic analysis of three untethered and two tethered Ru N-heterocyclic carbene (NHC) complexes were also carried out. These RuNHC complexes catalyze transfer hydrogenation of aromatic ketones in 2-propanol under reflux, optimally in the presence of (25 mol %) KOH. Under these conditions, the formation of 2-3 nm-sized Ru0 nanoparticles was detected by TEM measurements. A solid-state NMR investigation of the nanoparticles suggested that the NHC ligands were bound to the surface of the Ru nanoparticles (NPs). This base-promoted route to NHC-stabilized ruthenium nanoparticles directly from arene-tethered ruthenium-NHC complexes and from untethered ruthenium-NHC complexes is more convenient than previously known routes to NHC-stabilized Ru nanocatalysts. Similar catalytically active RuNPs were also generated from the reaction of a mixture of [RuCl2 (p-cymene)]2 and the NHC precursor with KOH in isopropanol under reflux. The transfer hydrogenation catalyzed by these NHC-stabilized RuNPs possess a high turnover number. The catalytic efficiency was significantly reduced if nanoparticles were exposed to air or allowed to aggregate and precipitate by cooling the reaction mixtures during the reaction.
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Affiliation(s)
- Lakshay Kathuria
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore, Karnataka, 560012, India
| | - Noor U Din Reshi
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore, Karnataka, 560012, India
| | - Ashoka G Samuelson
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore, Karnataka, 560012, India
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