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D’Elia MF, Yu Y, Renggli M, Ehweiner MA, Vidovic C, Mösch-Zanetti NC, Niederberger M, Caseri W. Synthesis of Soluble High Molar Mass Poly(Phenylene Methylene)-Based Polymers. Polymers (Basel) 2024; 16:967. [PMID: 38611225 PMCID: PMC11014094 DOI: 10.3390/polym16070967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
Poly(phenylene methylene) (PPM) is a multifunctional polymer that is also active as an anticorrosion fluorescent coating material. Although this polymer was synthesized already more than 100 years ago, a versatile synthetic route to obtain soluble high molar mass polymers based on PPM has yet to be achieved. In this article, the influence of bifunctional bis-chloromethyl durene (BCMD) as a branching agent in the synthesis of PPM is reported. The progress of the reaction was followed by gel permeation chromatography (GPC) and NMR analysis. PPM-based copolymers with the highest molar mass reported so far for this class of materials (up to Mn of 205,300 g mol-1) were isolated. The versatile approach of using BCMD was confirmed by employing different catalysts. Interestingly, thermal and optical characterization established that the branching process does not affect the thermoplastic behavior and the fluorescence of the material, thus opening up PPM-based compounds with high molar mass for applications.
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Affiliation(s)
- Marco F. D’Elia
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland; (Y.Y.); (M.R.); (M.N.)
| | - Yingying Yu
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland; (Y.Y.); (M.R.); (M.N.)
| | - Melvin Renggli
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland; (Y.Y.); (M.R.); (M.N.)
| | - Madeleine A. Ehweiner
- Institut für Chemie/Bereich Anorganische Chemie, Universitaet Graz, Schubertstraße 1/3, 8010 Graz, Austria; (M.A.E.); (C.V.); (N.C.M.-Z.)
| | - Carina Vidovic
- Institut für Chemie/Bereich Anorganische Chemie, Universitaet Graz, Schubertstraße 1/3, 8010 Graz, Austria; (M.A.E.); (C.V.); (N.C.M.-Z.)
| | - Nadia C. Mösch-Zanetti
- Institut für Chemie/Bereich Anorganische Chemie, Universitaet Graz, Schubertstraße 1/3, 8010 Graz, Austria; (M.A.E.); (C.V.); (N.C.M.-Z.)
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland; (Y.Y.); (M.R.); (M.N.)
| | - Walter Caseri
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland; (Y.Y.); (M.R.); (M.N.)
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2
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Motiee ES, Karbasi S, Bidram E, Sheikholeslam M. Investigation of physical, mechanical and biological properties of polyhydroxybutyrate-chitosan/graphene oxide nanocomposite scaffolds for bone tissue engineering applications. Int J Biol Macromol 2023; 247:125593. [PMID: 37406897 DOI: 10.1016/j.ijbiomac.2023.125593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/13/2023] [Accepted: 06/26/2023] [Indexed: 07/07/2023]
Abstract
Mechanical properties appropriate to native tissues, as an essential component in bone tissue engineering scaffolds, plays a significant role in tissue formation. In the current study, Poly-3 hydroxybutyrate-chitosan (PC) scaffolds reinforced with graphene oxide (GO) were made by the electrospinning method. The addition of GO led to a decrease in fibers diameter, an increase in thermal capacity and an improvement in the surface hydrophilicity of nanocomposite scaffolds. A significant increase in the mechanical properties of PC/GO (PCG) nanocomposite scaffolds was achieved due to the inherent strength of GO as well as its uniform dispersion throughout the polymeric matrix owing to hydrogen bonding and polar interactions. Also, lower biological degradation of the scaffolds (~30% in 100 days) due to the presence of GO provides essential mechanical support for bone regeneration. In addition, the bioactivity results showed that GO reinforcement significantly increases the biomineralization on the surface of the scaffolds. Evaluating cell adhesion and proliferation, as well as ALP activity of MG-63 cells on PC and PCG scaffolds indicated the positive effect of GO on scaffolds' biocompatibility. Overall, the improvement of physicochemical, mechanical, and biological properties of GO-reinforced scaffolds shows the potential of PCG nanocomposite scaffolds for bone tissue engineering.
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Affiliation(s)
- Elham-Sadat Motiee
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Karbasi
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran; Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Elham Bidram
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammadali Sheikholeslam
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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3
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D’Elia MF, Magni M, Trasatti SPM, Niederberger M, Caseri WR. Improving the Corrosion Protection of Poly(phenylene methylene) Coatings by Side Chain Engineering: The Case of Methoxy-Substituted Copolymers. Int J Mol Sci 2022; 23:16103. [PMID: 36555741 PMCID: PMC9784788 DOI: 10.3390/ijms232416103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/09/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
This work aims to improve the corrosion protection features of poly(phenylene methylene) (PPM) by sidechain engineering inserting methoxy units along the polymer backbone. The influence of side methoxy groups at different concentrations (4.6% mol/mol and 9% mol/mol) on the final polymer properties was investigated by structural and thermal characterization of the resulting copolymers: co-PPM 4.6% and co-PPM 9%, respectively. Then, coatings were processed by hot pressing the polymers powder on aluminum alloy AA2024 and corrosion protection properties were evaluated exposing samples to a 3.5% w/v NaCl aqueous solution. Anodic polarization tests evidenced the enhanced corrosion protection ability (i.e., lower current density) by increasing the percentage of the co-monomer. Coatings made with co-PPM 9% showed the best protection performance with respect to both PPM blend and PPM co-polymers reported so far. Electrochemical response of aluminum alloy coated with co-PPM 9% was monitored over time under two "artificially-aged" conditions, that are: (i) a pristine coating subjected to potentiostatic anodic polarization cycles, and (ii) an artificially damaged coating at resting condition. The first scenario points to accelerating the corrosion process, the second one models damage of the coating potentially occurring either due to natural deterioration or due to any accidental scratching of the polymer layer. In both cases, an intrinsic self-healing phenomenon was indirectly argued by the time evolution of the impedance and of the current density of the coated systems. The degree of restoring to the "factory conditions" by co-polymer coatings after self-healing events is eventually discussed.
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Affiliation(s)
- Marco F. D’Elia
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Mirko Magni
- Department of Environmental Science and Policy, Universitá degli Studi di Milano, 20133 Milan, Italy
| | - Stefano P. M. Trasatti
- Department of Environmental Science and Policy, Universitá degli Studi di Milano, 20133 Milan, Italy
| | - Markus Niederberger
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Walter R. Caseri
- Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
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4
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Xu W, Yao L, Ding D, Zhou H, Zhou Y, Zhang Y. Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenzong Xu
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
| | - Le Yao
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
| | - Ding Ding
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
| | - Haiou Zhou
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
| | - Yaocheng Zhou
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
| | - Yi Zhang
- School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei People's Republic of China
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Smart Anticorrosion Coatings Based on Poly(phenylene methylene): An Assessment of the Intrinsic Self-Healing Behavior of the Copolymer. Polymers (Basel) 2022; 14:polym14173457. [PMID: 36080534 PMCID: PMC9460725 DOI: 10.3390/polym14173457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 11/29/2022] Open
Abstract
Poly(phenylene methylene) (PPM) is a multifunctional polymer featuring hydrophobicity, high thermal stability, fluorescence and thermoplastic processability. Accordingly, smart corrosion resistant PPM-based coatings (blend and copolymer) were prepared and applied by hot pressing on aluminum alloy AA2024. The corrosion protection properties of the coatings and their dependence on coating thickness were evaluated for both strategies employed. The accelerated cyclic electrochemical technique (ACET), based on a combination of electrochemical impedance spectroscopy (EIS), cathodic polarizations and relaxation steps, was used as the main investigating technique. At the coating thickness of about 50 µm, both blend and copolymer PPM showed effective corrosion protection, as reflected by |Z|0.01Hz of about 108 Ω cm2 over all the ACET cycles. In contrast, when the coating thickness was reduced to 30 µm, PPM copolymer showed neatly better corrosion resistance than blended PPM, maintaining |Z|0.01Hz above 108 Ω cm2 with respect to values below 106 Ω cm2 of the latter. Furthermore, the analysis of many electrochemical key features, in combination with the optical investigation of the coating surface under 254 nm UV light, confirms the intrinsic self-healing ability of the coatings made by PPM copolymer, contrary to the reference specimen (i.e., blend PPM).
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6
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Cascone E, Longo S, Acocella MR. Basified Graphene Oxide and PPO Composite Aerogel with Basified Graphene Oxide for Henry Reaction in Solvent-Free Conditions: A Green Approach. ACS OMEGA 2022; 7:25394-25402. [PMID: 35910100 PMCID: PMC9330226 DOI: 10.1021/acsomega.2c02335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Novel basified graphene oxide and high-porosity monolithic composite aerogels of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) containing basified graphene oxide (b-eGO) have been prepared as recoverable and reusable catalysts for the Henry reaction in solvent-free conditions at room temperature. The results showed that, although b-eGO was able to promote the reaction, it suffered from reduced stability. On the other hand, PPO/b-eGO aerogels were able to efficiently promote the Henry reaction in solvent-free conditions. The product could be obtained pure without a purification step, and the catalyst was stable for over 15 months and could be easily recycled without losing catalytic efficiency. The stereochemical outcome was further investigated in the presence of PPO/b-eGO. Despite its negligible influence on diastereoselectivity, better efficiency and a sensible reduction of reaction time were observed.
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Thakur S, Martínez-Alonso C, Lopez-Hernandez E, Lopez-Manchado MA, Verdejo R. Melt and solution processable novel photoluminescent polymer blends for multifaceted advanced applications. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123378] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Soni J, Sethiya A, Sahiba N, Agarwal S. Recent advancements in organic synthesis catalyzed by graphene oxide metal composites as heterogeneous nanocatalysts. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6162] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jay Soni
- Department of Chemistry, Synthetic Organic Chemistry Laboratory MLSU Udaipur India
| | - Ayushi Sethiya
- Department of Chemistry, Synthetic Organic Chemistry Laboratory MLSU Udaipur India
| | - Nusrat Sahiba
- Department of Chemistry, Synthetic Organic Chemistry Laboratory MLSU Udaipur India
| | - Shikha Agarwal
- Department of Chemistry, Synthetic Organic Chemistry Laboratory MLSU Udaipur India
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9
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Huang J, Xi J, Chen W, Bai Z. Graphene-derived Materials for Metal-free Carbocatalysis of Organic Reactions. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21070340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Soni J, Sahiba N, Sethiya A, Teli P, Agarwal DK, Manhas A, Jha PC, Joshi D, Agarwal S. Biscoumarin Derivatives as Potent anti-Microbials: Graphene Oxide Catalyzed Eco-Benign Synthesis, Biological Evaluation and Docking Studies. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1852277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jay Soni
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU, Udaipur, India
| | - Nusrat Sahiba
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU, Udaipur, India
| | - Ayushi Sethiya
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU, Udaipur, India
| | - Pankaj Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU, Udaipur, India
| | | | - Anu Manhas
- Department of Chemistry, Pandit Deendayal Petroleum University, Gandhinagar, India
| | - Prakash Chandra Jha
- School of Applied and Material Science, Central University of Gujarat, Gandhinagar, India
| | - Deepkumar Joshi
- Department of Chemistry, Sheth M.N. Science College, Patan, Gujarat, India
| | - Shikha Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU, Udaipur, India
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Jung H, Bielawski CW. Soluble asphaltene oxide: a homogeneous carbocatalyst that promotes synthetic transformations. RSC Adv 2020; 10:15598-15603. [PMID: 35495464 PMCID: PMC9052364 DOI: 10.1039/d0ra01762k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/08/2020] [Indexed: 11/29/2022] Open
Abstract
Carbocatalysts, materials which are predominantly composed of carbon and catalyze the synthesis of organic or inorganic compounds, are promising alternatives to metal-based analogues. Even though current carbocatalysts have been successfully employed in a broad range of synthetic transformations, they suffer from a number of drawbacks in part due to their heterogeneous nature. For example, the insolubility of prototypical carbocatalysts, such as graphene oxide (GO), may restrict access to catalytically-active sites in a manner that limits performance and/or challenges optimization. Herein we describe the preparation and utilization of soluble asphaltene oxide (sAO), which is a novel material that is composed of oxidized polycyclic aromatic hydrocarbons and is soluble in a wide range of organic solvents as well as in aqueous media. sAO promotes an array of synthetically useful transformations, including esterifications, cyclizations, multicomponent reactions, and cationic polymerizations. In many cases, sAO was found to exhibit higher catalytic activities than its heterogeneous analogues and was repeatedly and conveniently recycled, features that were attributed to its ability to form homogeneous phases. Soluble carbocatalysts, materials which are predominantly composed of carbon and catalyze the synthesis of organic or inorganic compounds, are promising alternatives to metal-based analogues.![]()
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Affiliation(s)
- Hyosic Jung
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea .,Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea .,Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea.,Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
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12
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Teng D, Wei X, Yang Z, Zhu Q, Gao H, Li J, Zhang M, Zong Z, Kang Y. Synthesis of poly(phenylene methylenes)
via
a AlCl
3
‐mediated Friedel–Craft alkylation of multi‐substituted benzyl bromide with benzene. J Appl Polym Sci 2019. [DOI: 10.1002/app.48779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dao‐Guang Teng
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Xian‐Yong Wei
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
- State Key Laboratory of High‐efficiency Coal Utilization and Green Chemical EngineeringNingxia University Yinchuan 750021 People's Republic of China
| | - Zheng Yang
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Qing‐Jiang Zhu
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Hua‐Shuai Gao
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Jia‐Hao Li
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Min Zhang
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Zhi‐Min Zong
- Key Laboratory of Coal Processing and Efficient Utilization, Ministry of EducationChina University of Mining & Technology Xuzhou 221116 People's Republic of China
| | - Yv‐Hong Kang
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical EngineeringYulin University Yulin 71900 People's Republic of China
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El-hoshoudy A, Hosny R, Fathy M, Abdelraheem O, Gomaa S, Desouky S. Enhanced oil recovery using polyacrylates/ACTF crosslinked composite: Preparation, characterization and coreflood investigation. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 2019; 181:106236. [DOI: 10.1016/j.petrol.2019.106236] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
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14
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Abstract
Abstract
Carbocatalysts, which are catalytically-active materials derived from carbon-rich sources, are attractive alternatives to metal-based analogs. Graphene oxide is a prototypical example and has been successfully employed in a broad range of synthetic transformations. However, its use is accompanied by a number of practical and fundamental drawbacks. For example, graphene oxide undergoes explosive decomposition when subjected to elevated temperatures or microwaves. We found that asphaltene oxide, an oxidized collection of polycyclic aromatic hydrocarbons that are often discarded from petroleum refining processes, effectively overcomes the drawbacks of using graphene oxide in synthetic chemistry and constitutes a new class of carbocatalysts. Here we show that asphaltene oxide may be used to promote a broad range of transformations, including Claisen-Schmidt condensations, C–C cross-couplings, and Fischer indole syntheses, as well as chemical reactions which benefit from the use of microwave reactors.
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15
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Poly(phenylene methylene)-Based Coatings for Corrosion Protection: Replacement of Additives by Use of Copolymers. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9173551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Poly(phenylene methylene) (PPM) is a thermally stable, hydrophobic, fluorescent hydrocarbon polymer. Recently, blended PPM has been proposed as a valuable anti-corrosion coating material, and, in particular, rheological additives such as external plasticizers resulted crucial to prevent crack formation. Accordingly, to avoid common problems related to the use of external plasticizers, the development of PPM-related copolymer-based coatings containing n-octyloxy side chains and their anti-corrosion behavior were explored in this study. The aluminum alloy AA2024, widely employed for corrosion studies, was selected as a substrate, covered with a thin layer of a polybenzylsiloxane in order to improve adhesion between the underlying hydrophilic substrate and the top hydrophobic coating. Gratifyingly, coatings with those copolymers were free of bubbles and cracks. The n-octyloxy side-chains may be regarded to adopt the role of a bound plasticizer, as the glass transition temperature of the copolymers decreases with increasing content of alkoxy side-chains. Electrochemical corrosion tests on PPM-substituted coatings exhibited good corrosion protection of the metal surface towards a naturally aerated near-neutrally 3.5% wt.% NaCl neutral solution, providing comparable results to blended PPM formulations, previously reported. Hence, the application of rheological additives can be avoided by use of proper design copolymers.
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Graphene Oxide and Oxidized Carbon Black as Catalyst for Crosslinking of Phenolic Resins. Polymers (Basel) 2019; 11:polym11081330. [PMID: 31405139 PMCID: PMC6722651 DOI: 10.3390/polym11081330] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/07/2019] [Accepted: 08/07/2019] [Indexed: 02/08/2023] Open
Abstract
Influence of different graphite-based nanofillers on crosslinking reaction of resorcinol, as induced by hexa(methoxymethyl)melamine, is studied. Curing reactions leading from low molecular mass compounds to crosslinked insoluble networks are studied by indirect methods based on Differential Scanning Calorimetry. Reported results show a catalytic activity of graphene oxide (eGO) on this reaction, comparable to that one already described in the literature for curing of benzoxazine. For instance, for an eGO content of 2 wt %, the exothermic crosslinking DSC peak (upon heating at 10 °C/min) shifted 6 °C. More relevantly, oxidized carbon black (oCB) is much more effective as catalyst of the considered curing reaction. In fact, for an oCB content of 2 wt %, the crosslinking DSC peak can be shifted more than 30 °C and a nearly complete crosslinking is already achieved by thermal treatment at 120 °C. The possible origin of the higher catalytic activity of oCB with respect to eGO is discussed.
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Peng J, Zhang Y, Zhang C, Miao D, Li J, Liu H, Wang L, Gao S. Removal of triclosan in a Fenton-like system mediated by graphene oxide: Reaction kinetics and ecotoxicity evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 673:726-733. [PMID: 31003100 DOI: 10.1016/j.scitotenv.2019.03.354] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/26/2019] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
As a typical nanomaterial, graphene oxide (GO) can be easily dispersed in water and may affect the aqueous environment. In this paper, the degradation of triclosan (TCS) in a Fenton-like system Fe3+/H2O2 in GO aqueous solution was investigated. Interestingly, it was observed that GO at low concentration (2.0 mg/L) could exhibit significant catalytic effect on TCS removal. Meanwhile, results of XPS, Raman and TEM spectroscopy suggested the structure and chemical composition of GO did not exhibit significant change after the oxidation process within 30 min. As per the radical quenching experiments and ESR tests, hydroxyl radical (·OH) was mainly responsible for the decomposition of TCS. Further mechanism study indicated that the reaction activation energy (Ea) could be lowered and the production of ·OH be promoted in the presence of GO, respectively. A total of nine intermediates of TCS degradation were detected by TOF-LC-MS after SPE procedure. Finally, ecotoxicity assessment revealed that degradation of TCS by Fe3+/H2O2 system in GO aqueous solution could yield by-products of smaller toxicity compared with parent compounds.
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Affiliation(s)
- Jianbiao Peng
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Yaozong Zhang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Chaonan Zhang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Dong Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Jianhua Li
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Haijin Liu
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Lianhong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
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Zhao FF, Wang SC, Zhu ZL, Wang SG, Liu FF, Liu GZ. Effects of oxidation degree on photo-transformation and the resulting toxicity of graphene oxide in aqueous environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:1106-1114. [PMID: 31146316 DOI: 10.1016/j.envpol.2019.03.114] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/09/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Graphene oxide (GO) has been demonstrated to be key component for diverse applications. However, their potential environmental reactivity, fate and risk have not been fully evaluated to date. In this study, we investigated the photochemical reactivity of four types of GO with different oxidation degrees in aqueous environment, and their related toxicity to two bacterial models Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was further compared. After UV-irradiation, a large amount of oxygen functional groups on GO were reduced and the electronic conjugations within GO were restored as indicated by UV-visible absorption spectra, X-ray photoelectron spectroscopy and Raman spectroscopy analysis. Moreover, the higher the oxidation degree of the pristine GO was, the more obvious of the photo-transformation changes were. In order to further reveal the photochemical reactivity mechanisms, the reactive oxygen species (ROS) generation of GO was monitored. The quantity of ROS including singlet oxygen (1O2), superoxide anions (O2·-), and hydroxyl radicals (·OH) increased with increasing oxidation degree of GO, which was in accordance with the previous characterization results. Scanning electron microscopy and cell growth analyses of E. coli and S. aureus showed that the photochemical transformation enhanced the toxicity of GO, which might be due to an increase in functional group density. The higher conductivity of the reduced graphene oxide (RGO) was responsible for its stronger toxicity than GO through membrane damage and oxidative stress to bacteria. This study revealed that the oxidation degrees play important roles in photochemical transformation and the resulting toxicity of GO, which is helpful for understanding the environmental behaviors and risks of GO in aquatic environments.
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Affiliation(s)
- Fei-Fei Zhao
- Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, PR China
| | - Su-Chun Wang
- Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, PR China
| | - Zhi-Lin Zhu
- Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, PR China
| | - Shu-Guang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China
| | - Fei-Fei Liu
- Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, PR China.
| | - Guang-Zhou Liu
- Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, PR China.
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19
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Jiang X, Yu Y, Xu R, Li L, Cao Y, Xiang M, Kang J, Sheng X. Effects of stereo‐defect distribution on the crystallization and polymorphic behavior of
β
‐nucleated isotactic polypropylene/graphene oxide composites with different melt structures. POLYM ENG SCI 2019. [DOI: 10.1002/pen.25086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xi Jiang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Yansong Yu
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Ruizhang Xu
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Lu Li
- Chongqing Zhixiang Paving Technology Engineering Co., Ltd. Chongqing China
| | - Ya Cao
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Ming Xiang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Jian Kang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu People's Republic of China
| | - Xingyue Sheng
- Chongqing Zhixiang Paving Technology Engineering Co., Ltd. Chongqing China
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20
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A Metal-Free Carbon-Based Catalyst: An Overview and Directions for Future Research. C — JOURNAL OF CARBON RESEARCH 2018. [DOI: 10.3390/c4040054] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metal-free carbon porous materials (CPMs) have gained the intensive attention of scientists and technologists because of their potential applications, ranging from catalysis to energy storage. Various simple and facile strategies are proposed for the preparation of CPMs with well-controlled sizes, shapes, and modifications on the surface. The extraordinary tenability of the pore structure, the environmental acceptability, the unique surface and the corrosion resistance properties allow them to be suitable materials for a large panel of catalysis applications. This review briefly outlines the different signs of progresses made towards synthesizing CPMs, and their properties, including catalytic efficiency, stability, and recyclability. Finally, we make a comparison of their catalytic performances with other nanocomposites, and we provide an outlook on the expected developments in the relevant research works.
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21
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Poly(Phenylene Methylene): A Multifunctional Material for Thermally Stable, Hydrophobic, Fluorescent, Corrosion-Protective Coatings. COATINGS 2018. [DOI: 10.3390/coatings8080274] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Poly(phenylene methylene) (PPM) is a thermally stable, hydrophobic, fluorescent hydrocarbon polymer. PPM has been proposed earlier to be useful as a coating material but this polymer was isolated in relevant molar masses only recently, and in large quantities. Accordingly, the preparation of coatings based on PPM and their behavior was explored in this study, with the example of the metal alloy AA2024 as a common substrate for corrosion tests. Coatings free of bubbles and cracks were obtained by hot pressing and application of the following steps: Coating on AA2024 with a layer of polybenzylsiloxane to improve the adhesion between PPM and the metal surface, the addition of polybenzylsiloxane to PPM in order to enhance the viscosity of the molten PPM, and the addition of benzyl butyl phthalate as a plasticizer. Electrochemical corrosion tests showed good protection of the metal surface towards a NaCl solution, thanks to a passive-like behavior in a wide potential window and a very low current density. Remarkably, the PPM coating also exhibited self-healing towards localized attacks, which inhibits the propagation of corrosion.
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22
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Braendle A, Vidovič C, Mösch-Zanetti NC, Niederberger M, Caseri W. Synthesis of High Molar Mass Poly(phenylene methylene) Catalyzed by Tungsten(II) Compounds. Polymers (Basel) 2018; 10:polym10080881. [PMID: 30960806 PMCID: PMC6404035 DOI: 10.3390/polym10080881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 07/24/2018] [Indexed: 11/30/2022] Open
Abstract
Poly(phenylene methylene)s (PPMs) with high molar masses were isolated by polymerization of benzyl chloride catalyzed with tungsten(II) compounds and subsequent fractionation. Four different tungsten(II) catalysts were successfully exploited for the polymerization, for which a strict temperature profile was developed. The PPMs possessed roughly a trimodal molar mass distribution. Simple fractionation by phase separation of 2-butanone solutions allowed to effectively segregate the products primarily into PPM of low molar mass (Mn = 1600 g mol−1) and high molar mass (Mn = 167,900 g mol−1); the latter can be obtained in large quantities up to 50 g. The evolution of the trimodal distribution and the monomer conversion was monitored by gel permeation chromatography (GPC) and 1H NMR spectroscopy, respectively, over the course of the polymerization. The results revealed that polymerization proceeded via a chain-growth mechanism. This study illustrates a new approach to synthesize PPM with hitherto unknown high molar masses which opens the possibility to explore new applications, e.g., for temperature-resistant coatings, fluorescent coatings, barrier materials or optical materials.
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Affiliation(s)
- Andreas Braendle
- ETH Zürich, Department of Materials, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.
| | - Carina Vidovič
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Markus Niederberger
- ETH Zürich, Department of Materials, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.
| | - Walter Caseri
- ETH Zürich, Department of Materials, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.
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23
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Synthesis of calcium carbonate in alkali solution based on graphene oxide and reduced graphene oxide. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Acocella MR, Guerra G. Graphene-Based Carbocatalysts for Thermoset Polymers and for Diastereoselective and Enantioselective Organic Synthesis. ChemCatChem 2018. [DOI: 10.1002/cctc.201702015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Maria Rosaria Acocella
- Department of Chemistry and Biology “Adolfo Zambelli”; University of Salerno; Via Giovanni Paolo II, 132 Fisciano Salerno SA Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology “Adolfo Zambelli”; University of Salerno; Via Giovanni Paolo II, 132 Fisciano Salerno SA Italy
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25
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Fang J, Peng Z, Yang Y, Wang J, Guo J, Gong H. Graphene-Oxide-Promoted Direct Dehydrogenative Coupling Reaction of Aromatics. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700673] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jingxian Fang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
| | - Zhiyong Peng
- Chengda Pharmaceuticals Co., Ltd.; Huanghe Road 36, Economic Development Zone, Jiashan Zhejiang 314100 P. R. China
| | - Yun Yang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
| | - Jiawei Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
| | - Jiaying Guo
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
| | - Hang Gong
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
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26
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Villano R, Acocella MR, Guerra G. Oxidized Carbon Black as Catalyst for the Enamine Formation in Solvent-Free Conditions: A Green Strategy to Build the Benzodiazepine Scaffold. ChemistrySelect 2017. [DOI: 10.1002/slct.201701711] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rosaria Villano
- Istituto di Chimica Biomolecolare - CNR; via Campi Flegrei 34 80078 Pozzuoli (NA) Italy, Fax: +39 0818041770
| | - Maria Rosaria Acocella
- Department of Chemistry and Biology; University of Salerno; via Giovanni Paolo II 132 84084 Fisciano (SA) Italy, Tel.: +39 089969392, Fax: +39 089969603
| | - Gaetano Guerra
- Department of Chemistry and Biology; University of Salerno; via Giovanni Paolo II 132 84084 Fisciano (SA) Italy, Tel.: +39 089969392, Fax: +39 089969603
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27
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Catalytic Activity of Oxidized Carbon Black and Graphene Oxide for the Crosslinking of Epoxy Resins. Polymers (Basel) 2017; 9:polym9040133. [PMID: 30970813 PMCID: PMC6432347 DOI: 10.3390/polym9040133] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 03/30/2017] [Accepted: 04/03/2017] [Indexed: 11/17/2022] Open
Abstract
This article compares the catalytic activities of oxidized carbon black (oCB) and graphene oxide (eGO) samples on the kinetics of a reaction of diglycidyl ether of bisphenol A (DGEBA) with a diamine, leading to crosslinked insoluble networks. The study is mainly conducted by rheometry and Differential Scanning Calorimetry (DSC). Following the same oxidation procedure, CB samples are more efficiently oxidized than graphite samples. For instance, CB and graphite samples with high specific surface areas (151 and 308 m²/g), as oxidized by the Hummers' method, exhibit O/C wt/wt ratios of 0.91 and 0.62, respectively. Due to the higher oxidation levels, these oCB samples exhibit a higher catalytic activity toward the curing of epoxy resins than fully exfoliated graphene oxide.
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28
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29
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Heidari M, Sedrpoushan A, Mohannazadeh F. Selective Oxidation of Benzylic C–H Using Nanoscale Graphene Oxide as Highly Efficient Carbocatalyst: Direct Synthesis of Terephthalic Acid. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masoud Heidari
- Institute of Industrial Chemistry, Iranian Research Organization for Science and Technology (IROST), P.O. Box 33535-111, Tehran, Iran
| | - Alireza Sedrpoushan
- Institute of Industrial Chemistry, Iranian Research Organization for Science and Technology (IROST), P.O. Box 33535-111, Tehran, Iran
| | - Farajollah Mohannazadeh
- Institute of Industrial Chemistry, Iranian Research Organization for Science and Technology (IROST), P.O. Box 33535-111, Tehran, Iran
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30
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Gómez-Martínez M, Baeza A, Alonso DA. Pinacol Rearrangement and Direct Nucleophilic Substitution of Allylic Alcohols Promoted by Graphene Oxide and Graphene Oxide CO2H. ChemCatChem 2017. [DOI: 10.1002/cctc.201601362] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Melania Gómez-Martínez
- Organic Chemistry Department and Institute of Organic Synthesis (ISO), Faculty of Sciences; University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Alejandro Baeza
- Organic Chemistry Department and Institute of Organic Synthesis (ISO), Faculty of Sciences; University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Diego A. Alonso
- Organic Chemistry Department and Institute of Organic Synthesis (ISO), Faculty of Sciences; University of Alicante; Apdo. 99 03080 Alicante Spain
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31
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Su DS, Wen G, Wu S, Peng F, Schlögl R. Carbocatalysis in Liquid-Phase Reactions. Angew Chem Int Ed Engl 2016; 56:936-964. [DOI: 10.1002/anie.201600906] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Dang Sheng Su
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Guodong Wen
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Shuchang Wu
- Max-Planck-Institut für chemische Energiekonversion; Stiftstrasse 34-36 45470 Mülheim a.d. Ruhr Germany
| | - Feng Peng
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Robert Schlögl
- Max-Planck-Institut für chemische Energiekonversion; Stiftstrasse 34-36 45470 Mülheim a.d. Ruhr Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 Berlin 14195 Germany
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32
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Su DS, Wen G, Wu S, Peng F, Schlögl R. Carbokatalyse in Flüssigphasenreaktionen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600906] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dang Sheng Su
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Guodong Wen
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Shuchang Wu
- Max-Planck-Institut für chemische Energiekonversion; Stiftstraße 34-36 45470 Mülheim an der Ruhr Deutschland
| | - Feng Peng
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Robert Schlögl
- Max-Planck-Institut für chemische Energiekonversion; Stiftstraße 34-36 45470 Mülheim an der Ruhr Deutschland
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 Berlin 14195 Deutschland
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33
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Corcione CE, Acocella MR, Giuri A, Maffezzoli A. Epoxy Resin Catalyzed by Graphite-Based Nanofillers. INT POLYM PROC 2016. [DOI: 10.3139/217.3225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Graphene stacks/epoxy nanocomposites were produced and characterized in order to analyse the effect of different graphene precursors on cure reaction of a model epoxy matrix. A kinetic analysis of the cure mechanism of the epoxy resin associated to the catalytical activity of the graphite based fillers was performed by isothermal DSC measurements. The DSC results showed that the addition of all graphite based fillers greatly increased the enthalpy of epoxy reaction and the reaction rate, confirming the presence of a catalytic activity of graphitic layers on the crosslinking reaction between the epoxy resin components (epoxide oligomer and di-amine). A kinetic modelling analysis, arising from an autocatalyzed reaction mechanism, was finally applied to isothermal DSC data, in order to predict the cure mechanism of the epoxy resin in presence of the graphite based nanofiller.
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Affiliation(s)
- C. Esposito Corcione
- Dipartimento di Ingegneria dell'Innovazione , Università del Salento, Lecce , Italy
| | - M. R. Acocella
- Dipartimento di Chimica e Biologia e Unità di Ricerca INSTM , Università di Salerno, Fisciano , Italy
| | - A. Giuri
- Dipartimento di Ingegneria dell'Innovazione , Università del Salento, Lecce , Italy
| | - A. Maffezzoli
- Dipartimento di Ingegneria dell'Innovazione , Università del Salento, Lecce , Italy
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34
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Tang P, Hu G, Li M, Ma D. Graphene-Based Metal-Free Catalysts for Catalytic Reactions in the Liquid Phase. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01668] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pei Tang
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Gang Hu
- Israel Chemicals Limited, Shanghai 200021, China
| | - Mengzhu Li
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ding Ma
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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35
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Acocella MR, D'Urso L, Maggio M, Guerra G. Green Regio- and Enantioselective Aminolysis Catalyzed by Graphite and Graphene Oxide under Solvent-Free Conditions. ChemCatChem 2016. [DOI: 10.1002/cctc.201600241] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Rosaria Acocella
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Luciana D'Urso
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Mario Maggio
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
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36
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Larsen RM, Jensen EA. Epoxy-graphite oxide nanocomposites: Mechanical properties. J Appl Polym Sci 2016. [DOI: 10.1002/app.43591] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- R. Mikael Larsen
- Department of Mechanical and Manufacturing Engineering; Aalborg University; Fibigerstraede 16 Aalborg East DK-9220 Denmark
| | - Erik Appel Jensen
- Department of Mechanical and Manufacturing Engineering; Aalborg University; Fibigerstraede 16 Aalborg East DK-9220 Denmark
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37
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Acocella MR, Corcione CE, Giuri A, Maggio M, Maffezzoli A, Guerra G. Graphene oxide as a catalyst for ring opening reactions in amine crosslinking of epoxy resins. RSC Adv 2016. [DOI: 10.1039/c6ra00485g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The influence of different graphite-based nanofillers on epoxide ring opening reactions, as induced by amines for diglycidyl ether of bisphenol A (DGEBA), is studied.
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Affiliation(s)
- M. R. Acocella
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
| | | | - A. Giuri
- Dipartimento di Ingegneria dell'Innovazione
- Università del Salento
- Lecce
- Italy
| | - M. Maggio
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
| | - A. Maffezzoli
- Dipartimento di Ingegneria dell'Innovazione
- Università del Salento
- Lecce
- Italy
| | - G. Guerra
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
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38
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Maggio M, Mauro M, Acocella MR, Guerra G. Thermally stable, solvent resistant and flexible graphene oxide paper. RSC Adv 2016. [DOI: 10.1039/c6ra09476g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The ability of graphene oxide (GO) aqueous suspensions to form robust GO paper is largely improved by basification of the suspension before processing.
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Affiliation(s)
- Mario Maggio
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Marco Mauro
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Maria Rosaria Acocella
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- I-84084 Fisciano
- Italy
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39
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Hsu KC, Chen DH. Highly Sensitive, Uniform, and Reusable Surface-Enhanced Raman Scattering Substrate with TiO₂ Interlayer between Ag Nanoparticles and Reduced Graphene Oxide. ACS APPLIED MATERIALS & INTERFACES 2015; 7:27571-27579. [PMID: 26587760 DOI: 10.1021/acsami.5b08792] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
TiO2 nanoparticles and Ag nanoparticles were successively deposited on reduced graphene oxide (rGO) by a two-step solvothermal process to develop a reusable surface-enhanced Raman scattering (SERS) substrate with high sensitivity and uniformity owing to the 2-dimensional planar structure of rGO, the photocatalytic activity of TiO2, and the SERS function of Ag nanoparticles. The presence of TiO2 interlayer efficiently diminished the interference from the Raman intensities of D-band and G-band of rGO and hence enhanced the sensitivity significantly. As compared to Ag/rGO nanocomposite, the detection limit of 4-aminothiophenol (4-ATP) for Ag/TiO2/rGO nanocomposite could be lowered from 10(-10) to 10(-14) M, and its enhancement factor could be raised from 1.27 × 10(10) to 3.46 × 10(12). Meanwhile, good uniformity remained, the relative standard deviation (RSD) value was about 10%. Furthermore, by UV irradiation in water, the photocatalytic property of TiO2 could eliminate the Raman signal of 4-ATP efficiently and made this substrate reusable. After being reused five times, its excellent SERS performance was still retained. Thus, the Ag/TiO2/rGO nanocomposite developed in this work was a promising SERS substrate with good reusability and high sensitivity and uniformity.
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Affiliation(s)
- Kai-Chih Hsu
- Department of Chemical Engineering National Cheng Kung University , Tainan, Taiwan 701, Republic of China
| | - Dong-Hwang Chen
- Department of Chemical Engineering National Cheng Kung University , Tainan, Taiwan 701, Republic of China
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40
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Zhu Z, Shi S, Wang H. Radical Chain Polymerization Catalyzed by Graphene Oxide and Cooperative Hydrogen Bonding. Macromol Rapid Commun 2015; 37:187-94. [DOI: 10.1002/marc.201500573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 10/24/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Zhongcheng Zhu
- College of Chemistry Beijing Key Laboratory of Energy Conversion and Storage Materials Beijing Normal University Beijing 100875 P. R. China
| | - Shengjie Shi
- College of Chemistry Beijing Key Laboratory of Energy Conversion and Storage Materials Beijing Normal University Beijing 100875 P. R. China
| | - Huiliang Wang
- College of Chemistry Beijing Key Laboratory of Energy Conversion and Storage Materials Beijing Normal University Beijing 100875 P. R. China
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41
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Hu F, Patel M, Luo F, Flach C, Mendelsohn R, Garfunkel E, He H, Szostak M. Graphene-Catalyzed Direct Friedel–Crafts Alkylation Reactions: Mechanism, Selectivity, and Synthetic Utility. J Am Chem Soc 2015; 137:14473-80. [DOI: 10.1021/jacs.5b09636] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Feng Hu
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Mehulkumar Patel
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Feixiang Luo
- Department
of Chemistry and Chemical Biology, Rutgers University, 610 Taylor
Rd, Piscataway, New Jersey 08854, United States
| | - Carol Flach
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Richard Mendelsohn
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Eric Garfunkel
- Department
of Chemistry and Chemical Biology, Rutgers University, 610 Taylor
Rd, Piscataway, New Jersey 08854, United States
| | - Huixin He
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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42
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The effect of graphene oxide and its oxidized debris on the cure chemistry and interphase structure of epoxy nanocomposites. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.06.054] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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44
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Sulphur-doped graphene as metal-free carbocatalysts for the solventless aerobic oxidation of styrenes. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2015.02.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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45
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Chen Y, Zhang S, Liu X, Pei Q, Qian J, Zhuang Q, Han Z. Preparation of Solution-Processable Reduced Graphene Oxide/Polybenzoxazole Nanocomposites with Improved Dielectric Properties. Macromolecules 2015. [DOI: 10.1021/ma502326v] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yi Chen
- The Key
Laboratory for Ultrafine Materials of The Ministry of Education, School
of Materials Science and Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Shuo Zhang
- Department of Polymer Science, College of Polymer Science
and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Xiaoyun Liu
- The Key
Laboratory for Ultrafine Materials of The Ministry of Education, School
of Materials Science and Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Qibing Pei
- Soft Materials Research Laboratory, Department
of Materials Science and Engineering, University of California, Los Angeles, Los
Angeles, California 90095, United States
| | - Jun Qian
- The Key
Laboratory for Ultrafine Materials of The Ministry of Education, School
of Materials Science and Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Qixin Zhuang
- The Key
Laboratory for Ultrafine Materials of The Ministry of Education, School
of Materials Science and Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Zhewen Han
- The Key
Laboratory for Ultrafine Materials of The Ministry of Education, School
of Materials Science and Technology, East China University of Science and Technology, Shanghai 200237, China
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46
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Graphite oxide: a simple and efficient solid acid catalyst for the ring-opening of epoxides by alcohols. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.050] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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47
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Acocella MR, Mauro M, Guerra G. Regio- and enantioselective friedel-crafts reactions of indoles to epoxides catalyzed by graphene oxide: a green approach. CHEMSUSCHEM 2014; 7:3279-3283. [PMID: 25328083 DOI: 10.1002/cssc.201402770] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Indexed: 06/04/2023]
Abstract
Graphene oxide efficiently promotes high regio- and enantioselective ring opening reactions of aromatic epoxides by indoles addition, in solvent- and metal-free conditions. The Friedel-Crafts products were obtained with enantioselectivity up to 99 % ee. The complete inversion of stereochemistry indicates the occurrence of SN 2-type reaction, which assures high level of enantioselectivity.
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Affiliation(s)
- Maria Rosaria Acocella
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, 84080 Fisciano (Sa) (Italy).
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48
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Mauro M, Acocella MR, Corcione CE, Maffezzoli A, Guerra G. Catalytic activity of graphite-based nanofillers on cure reaction of epoxy resins. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.09.019] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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49
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Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study. Polymers (Basel) 2014. [DOI: 10.3390/polym6082232] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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50
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Navalon S, Dhakshinamoorthy A, Alvaro M, Garcia H. Carbocatalysis by Graphene-Based Materials. Chem Rev 2014; 114:6179-212. [DOI: 10.1021/cr4007347] [Citation(s) in RCA: 525] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Sergio Navalon
- Instituto
Universitario de Tecnología Química CSIC-UPV and Departamento
de Química, Universidad Politécnica de Valencia, Avenida
de los Naranjos s/n, 46022 Valencia, Spain
| | - Amarajothi Dhakshinamoorthy
- Centre
for Green Chemistry Processes, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Mercedes Alvaro
- Instituto
Universitario de Tecnología Química CSIC-UPV and Departamento
de Química, Universidad Politécnica de Valencia, Avenida
de los Naranjos s/n, 46022 Valencia, Spain
| | - Hermenegildo Garcia
- Instituto
Universitario de Tecnología Química CSIC-UPV and Departamento
de Química, Universidad Politécnica de Valencia, Avenida
de los Naranjos s/n, 46022 Valencia, Spain
- Center
of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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