Graphene chemically synthesized from benzene at liquid–liquid interfaces

Salvatierra, Rodrigo V.; Souza, Victor H.R.; Matos, Carolina Ferreira de; Oliveira, Marcela M.; Zarbin, Aldo J. G.

doi:10.1016/j.carbon.2015.06.016

Cited by 31 publications

(17 citation statements)

References 37 publications

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“…Among the many approaches leading to nanographenes, the benzene ring seems to be an ideal candidate for the bottom‐up synthesis of such structures . Zarabin and co‐workers attempted the construction of nanographene sheets from benzene at a liquid–liquid interface. According to their strategy, a single benzene ring should undergo FeCl 3 ‐mediated oxidative coupling to give oligo(paraphenylene) and/or poly(paraphenylene).…”

Section: Intermolecular Oxidative Aromatic Couplingmentioning

confidence: 99%

“…Among the many approaches leading to nanographenes,the benzene ring seems to be an ideal candidate for the bottom-up synthesis of such structures. [5,6,35,36] Zarabin and co-workers attempted [37] the construction of nanographene sheets from benzene at al iquid-liquid interface.A ccording to their strategy,asingle benzene ring should undergo FeCl 3 -mediated oxidative coupling to give oligo(paraphenylene) and/or poly(paraphenylene). Thep oly(paraphenylene) fractions should spontaneously migrate to the water-benzene interface, where the second polymerization step that creates lateral chains occurs.I nt he final step,as eries of intramolecular oxidative coupling processes between adjacent phenyl rings within the branched polymer takes place.T he proposed method allows the preparation of large graphene nanosheets with asurface area of about 800 nm 2 .…”

Section: Oxidative Homocoupling Of Arenes and Heteroarenesmentioning

confidence: 99%

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Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

et al. 2019

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Oxidative aromatic coupling occupies a fundamental place in the modern chemistry of aromatic compounds. It is a method of choice for the assembly of large and bewildering architectures. Considerable effort was also devoted to applications of the Scholl reaction for the synthesis of chiral biphenols and natural products. The ability to form biaryl linkages without any prefunctionalization provides an efficient pathway to many complex structures. Although the chemistry of this process is only now becoming fully understood, this reaction continues to both fascinate and challenge researchers. This is especially true for heterocoupling, that is, oxidative aromatic coupling with the chemoselective formation of a C−C bond between two different arenes. Analysis of the progress achieved in this field since 2013 reveals that many groups have contributed by pushing the boundary of structural possibilities, expanding into surface‐assisted (cyclo)dehydrogenation, and developing new reagents.

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Section: Intermolecular Oxidative Aromatic Couplingmentioning

confidence: 99%

Section: Oxidative Homocoupling Of Arenes and Heteroarenesmentioning

confidence: 99%

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

et al. 2019

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“…The simultaneous formation of a 2D morphology and a hierarchical porous architecture is attributed to a combined self‐templating effect from PDAA as well as the etching by KOH. As shown in Figure f, the numerous phenyl and trizaine rings in our PDAA resin allows its facile conversion into sp 2 hexagonal carbon rings and carbon rings with nitrogen dopants, which is related to oxidative dehydrogenation (Scholl reaction) of the precursor . Carbonization of PDAA leads to the formation of these graphitic layers embedded in amorphous and defective carbons, for example the carbons derived from the hemiaminal units.…”

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confidence: 97%

Scalable 2D Hierarchical Porous Carbon Nanosheets for Flexible Supercapacitors with Ultrahigh Energy Density

et al. 2018

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2D carbon nanomaterials such as graphene and its derivatives, have gained tremendous research interests in energy storage because of their high capacitance and chemical stability. However, scalable synthesis of ultrathin carbon nanosheets with well-defined pore architectures remains a great challenge. Herein, the first synthesis of 2D hierarchical porous carbon nanosheets (2D-HPCs) with rich nitrogen dopants is reported, which is prepared with high scalability through a rapid polymerization of a nitrogen-containing thermoset and a subsequent one-step pyrolysis and activation into 2D porous nanosheets. 2D-HPCs, which are typically 1.5 nm thick and 1-3 µm wide, show a high surface area (2406 m g ) and with hierarchical micro-, meso-, and macropores. This 2D and hierarchical porous structure leads to robust flexibility and good energy-storage capability, being 139 Wh kg for a symmetric supercapacitor. Flexible supercapacitor devices fabricated by these 2D-HPCs also present an ultrahigh volumetric energy density of 8.4 mWh cm at a power density of 24.9 mW cm , which is retained at 80% even when the power density is increased by 20-fold. The devices show very high electrochemical life (96% retention after 10000 charge/discharge cycles) and excellent mechanical flexibility.

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“…In addition, the method employed to process the material for the application is a key step, where thick films can damage the performance of the device, blocking the access of the inner electroactive sites and avoiding the use of high charge-discharge currents. Our research group developed a very effective route to deposit thin, transparent and homogeneous films of different unprocessable materials, as carbon nanotubes 23 24 , graphene 24 25 26 , metallic nanoparticles and different kind of nanocomposites 25 26 27 28 29 , in which the film is stabilized at a liquid-liquid interface, and easily deposited over different kind of ordinary substrates.…”

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confidence: 99%

One material, multiple functions: graphene/Ni(OH)2 thin films applied in batteries, electrochromism and sensors

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Oliveira

Bergamini

et al. 2016

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Different nanocomposites between reduced graphene oxide (rGO) and Ni(OH)2 nanoparticles were synthesized through modifications in the polyol method (starting from graphene oxide (GO) dispersion in ethylene glycol and nickel acetate), processed as thin films through the liquid-liquid interfacial route, homogeneously deposited over transparent electrodes and spectroscopically, microscopically and electrochemically characterized. The thin and transparent nanocomposite films (112 to 513 nm thickness, 62.6 to 19.9% transmittance at 550 nm) consist of α-Ni(OH)2 nanoparticles (mean diameter of 4.9 nm) homogeneously decorating the rGO sheets. As a control sample, neat Ni(OH)2 was prepared in the same way, consisting of porous nanoparticles with diameter ranging from 30 to 80 nm. The nanocomposite thin films present multifunctionality and they were applied as electrodes to alkaline batteries, as electrochromic material and as active component to electrochemical sensor to glycerol. In all the cases the nanocomposite films presented better performances when compared to the neat Ni(OH)2 nanoparticles, showing energy and power of 43.7 W h kg−1 and 4.8 kW kg−1 (8.24 A g−1) respectively, electrochromic efficiency reaching 70 cm2 C−1 and limit of detection as low as 15.4 ± 1.2 μmol L−1.

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Graphene chemically synthesized from benzene at liquid–liquid interfaces

Cited by 31 publications

References 37 publications

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

Scalable 2D Hierarchical Porous Carbon Nanosheets for Flexible Supercapacitors with Ultrahigh Energy Density

One material, multiple functions: graphene/Ni(OH)2 thin films applied in batteries, electrochromism and sensors

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