Efficient Bottom‐Up Preparation of Graphene Nanoribbons by Mild Suzuki–Miyaura Polymerization of Simple Triaryl Monomers

Li, Gang; Yoon, Ki‐Young; Zhong, Xinjue; Zhu, Xiaoyang; Dong, Guangbin

doi:10.1002/chem.201602007

Cited by 58 publications

(62 citation statements)

References 43 publications

(31 reference statements)

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“…[125] Thea uthors observed that the formation of the first four bonds is very fast (Figure 10 (Figure 10). [126][127][128][129] In the case of the hexafluorenylfused HBC 143,D DQ/MsOH proved to be more efficient than FeCl 3 (28 %versus 18 %yield). [128] As aconsequence of the presence of twelve hexyl chains pointing out of the PA H plane,t he aggregation of 143 in solution is restricted and it shows good solubility in common organic solvents.…”

Section: Large Planar Pahs Expanded Acenes and Nanographenesmentioning

confidence: 99%

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: Large Planar Pahs Expanded Acenes and Nanographenesmentioning

confidence: 99%

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

et al. 2019

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“…The classical solution synthesis has provided a variety of GNRs with different structural features and tunable band gaps, and can afford GNR materials on a gram scale, which can be processed from a solution for physical characterization and device fabrication [127,[139][140][141][142][143]. However, proving the structural perfection of such large macromolecules at the atomic level remains a challenging task.…”

Section: Vivacity Of Pah Chemistry In Light Of Gnrs and Graphenementioning

confidence: 99%

Polycyclic aromatic hydrocarbons in the graphene era

2019

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Polycyclic aromatic hydrocarbons (PAHs) have been the subject of interdisciplinary research in the fields of chemistry, physics, materials science, and biology. Notably, PAHs have drawn increasing attention since the discovery of graphene, which has been regarded as the "wonder" material in the 21st century. Different from semimetallic graphene, nanoscale graphenes, such as graphene nanoribbons and graphene quantum dots, exhibit finite band gaps owing to the quantum confinement, making them attractive semiconductors for next-generation electronic applications. Researches based on PAHs and graphenes have expanded rapidly over the past decade, thereby posing a challenge in conducting a comprehensive review. This study aims to interconnect the fields of PAHs and graphenes, which have mainly been discussed separately. In particular, by selecting representative examples, we explain how these two domains can stimulate each other. We hope that this integrated approach can offer new opportunities and further promote synergistic developments in these fields.

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“…In contrast, there is an obvious lack of knowledge about their optical properties. Optical absorption spectroscopy has been reported, showing the dependence of the gap on the width of the GNR [12,14,[20][21][22]. The comparison between reflectivity measurements on GNRs grown on gold and ab-initio calculations recently highlighted the excitonic nature of the optical transitions, with exciton binding energy as high as 1.5-1.8 eV [23].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence from graphene nanoribbons of well-defined structure

Zhao

Rondin

Delport

et al. 2017

Carbon

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Graphene nanoribbons synthesized by the bottom-up approach with optical energy gaps in the visible are investigated by means of optical spectroscopy. The optical absorption and fluorescence spectra of two graphene nanoribbons with different structures are reported as well as the life-time of the excited states. The possibility of the formation of excimer states in stacks of individual graphene nanoribbons is discussed in order to interpret the broad and highly Stokes-shifted luminescence lines observed on both structures. Finally, combined atomic force microscopy and confocal fluorescence measurements have been performed on small aggregates, showing the ability of graphene nanoribbons to emit light in the solid state. These observations open interesting perspectives for the use of graphene nanoribbons as near-infrared emitters.

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Efficient Bottom‐Up Preparation of Graphene Nanoribbons by Mild Suzuki–Miyaura Polymerization of Simple Triaryl Monomers

Cited by 58 publications

References 43 publications

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

Synthetic Applications of Oxidative Aromatic Coupling—From Biphenols to Nanographenes

Polycyclic aromatic hydrocarbons in the graphene era

Fluorescence from graphene nanoribbons of well-defined structure

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