scholarly journals Spectroscopic Evidence of New Low-Dimensional Planar Carbon Allotropes Based on Biphenylene via On-Surface Ullmann Coupling

Chemistry ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 1057-1062
Author(s):  
Teng Zhang ◽  
Cesare Grazioli ◽  
Huixia Yang ◽  
Kaiyue Jiang ◽  
Iulia Emilia Brumboiu ◽  
...  

The bottom-up synthesis and preliminary characterizations of a new biphenylene-based 2D framework are presented. This new low-dimensional carbon allotrope potentially completes the many hypothesized carbon networks based on biphenylene.

Science ◽  
2021 ◽  
Vol 372 (6544) ◽  
pp. 852-856
Author(s):  
Qitang Fan ◽  
Linghao Yan ◽  
Matthias W. Tripp ◽  
Ondřej Krejčí ◽  
Stavrina Dimosthenous ◽  
...  

The quest for planar sp2-hybridized carbon allotropes other than graphene, such as graphenylene and biphenylene networks, has stimulated substantial research efforts because of the materials’ predicted mechanical, electronic, and transport properties. However, their syntheses remain challenging given the lack of reliable protocols for generating nonhexagonal rings during the in-plane tiling of carbon atoms. We report the bottom-up growth of an ultraflat biphenylene network with periodically arranged four-, six-, and eight-membered rings of sp2-hybridized carbon atoms through an on-surface interpolymer dehydrofluorination (HF-zipping) reaction. The characterization of this biphenylene network by scanning probe methods reveals that it is metallic rather than a dielectric. We expect the interpolymer HF-zipping method to complement the toolbox for the synthesis of other nonbenzenoid carbon allotropes.


2018 ◽  
Vol 6 (15) ◽  
pp. 6687-6687 ◽  
Author(s):  
Shuaiwei Wang ◽  
Baocheng Yang ◽  
Houyang Chen ◽  
Eli Ruckenstein

Correction for ‘Popgraphene: a new 2D planar carbon allotrope composed of 5–8–5 carbon rings for high-performance lithium-ion battery anodes from bottom-up programming’ by Shuaiwei Wang et al., J. Mater. Chem. A, 2018, DOI: 10.1039/c8ta00438b.


2020 ◽  
Author(s):  
Qitang Fan ◽  
Linghao Yan ◽  
Matthias W Tripp ◽  
Ondrej Krejci ◽  
Stavrina Dimosthenous ◽  
...  

The quest for planar sp2-hybridized carbon allotropes other than graphene, such as graphenylene and biphenylene sheet, has stimulated substantial research efforts because of the materials' predicted unique mechanical, electronic and transport properties. However, their synthesis remains challenging due to the lack of reliable protocols for generating non-hexagonal rings during the in-plane tiling of carbon atoms. Here, we report the bottom-up growth of ultra-flat biphenylene sheet with periodically arranged four-, six-, and eight-membered rings of sp2 carbon atoms, via an unprecedented on-surface inter-polymer hydrogen fluoride (HF)-zipping reaction. The characterization of this biphenylene sheet by scanning probe methods solves the long-standing controversy over its dielectric or metallic nature. We expect the inter-polymer HF-zipping method to complement the toolbox for the synthesis of other nonbenzenoid carbon allotropes.


2020 ◽  
Author(s):  
Qitang Fan ◽  
Linghao Yan ◽  
Matthias W Tripp ◽  
Ondrej Krejci ◽  
Stavrina Dimosthenous ◽  
...  

The quest for planar sp2-hybridized carbon allotropes other than graphene, such as graphenylene and biphenylene sheet, has stimulated substantial research efforts because of the materials' predicted unique mechanical, electronic and transport properties. However, their synthesis remains challenging due to the lack of reliable protocols for generating non-hexagonal rings during the in-plane tiling of carbon atoms. Here, we report the bottom-up growth of ultra-flat biphenylene sheet with periodically arranged four-, six-, and eight-membered rings of sp2 carbon atoms, via an unprecedented on-surface inter-polymer hydrogen fluoride (HF)-zipping reaction. The characterization of this biphenylene sheet by scanning probe methods solves the long-standing controversy over its dielectric or metallic nature. We expect the inter-polymer HF-zipping method to complement the toolbox for the synthesis of other nonbenzenoid carbon allotropes.


2018 ◽  
Vol 6 (16) ◽  
pp. 6815-6821 ◽  
Author(s):  
Shuaiwei Wang ◽  
Baocheng Yang ◽  
Houyang Chen ◽  
Eli Ruckenstein

Popgraphene, a new 2D carbon allotrope constructed from 5–8–5 carbon rings, is proposed for use in high-performance lithium-ion battery anodes.


2017 ◽  
Vol 46 (6) ◽  
pp. 1643-1660 ◽  
Author(s):  
Michel Rickhaus ◽  
Marcel Mayor ◽  
Michal Juríček

Chiral non-planar polyaromatic systems that display zero, positive or negative Gaussian curvature are analysed and their potential to ‘encode’ chirality of larger sp2-carbon allotropes is evaluated. Shown is a hypothetical peanut-shaped carbon allotrope, where helical chirality results from the interplay of various curvature types.


ARCHALP ◽  
2020 ◽  
Vol 2020 (N. 4 / 2020) ◽  
Author(s):  
Giorgio Tecilla

The “Premio Triennale Giulio Andreolli – Fare Paesaggio” was born in 2016 with the aim of en-hancing landscape experiences in the European Alpine area. It is divided into three sections: plan-ning and programming initiatives, architectural and landscape interventions and education and par-ticipation actions. The success of the award shows the growing and transversal interest in landscape issues, both at in-stitutional and professional level, in the context of spontaneous and “bottom-up” initiatives. One emergent aspect of interest during the various editions is the birth of a large number of activi-ties related to the management of traditional rural landscape, and oriented to the knowledge of terri-tories and to the involvement of the inhabitants. These local communities are often engaged in new organizational methods, driven by sincere enthusiasm and civic sense. That is the reason why one of the most interesting elements emerging from the award experience must be sought in this intertwining between popular initiatives and both professional and institu-tional approaches. Bounding this reflection to the regeneration-driven production, which is the main topic of this issue, it is possible to isolate, among the many cases nominated for the award, some interesting experienc-es in which, with different outcomes, designers and clients have dealt with contemporary architec-ture, touching important themes related to the transformation of alpine landscapes.


Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2046 ◽  
Author(s):  
Stephanie Hui Kit Yap ◽  
Kok Ken Chan ◽  
Swee Chuan Tjin ◽  
Ken-Tye Yong

Recently, carbon allotropes have received tremendous research interest and paved a new avenue for optical fiber sensing technology. Carbon allotropes exhibit unique sensing properties such as large surface to volume ratios, biocompatibility, and they can serve as molecule enrichers. Meanwhile, optical fibers possess a high degree of surface modification versatility that enables the incorporation of carbon allotropes as the functional coating for a wide range of detection tasks. Moreover, the combination of carbon allotropes and optical fibers also yields high sensitivity and specificity to monitor target molecules in the vicinity of the nanocoating surface. In this review, the development of carbon allotropes-based optical fiber sensors is studied. The first section provides an overview of four different types of carbon allotropes, including carbon nanotubes, carbon dots, graphene, and nanodiamonds. The second section discusses the synthesis approaches used to prepare these carbon allotropes, followed by some deposition techniques to functionalize the surface of the optical fiber, and the associated sensing mechanisms. Numerous applications that have benefitted from carbon allotrope-based optical fiber sensors such as temperature, strain, volatile organic compounds and biosensing applications are reviewed and summarized. Finally, a concluding section highlighting the technological deficiencies, challenges, and suggestions to overcome them is presented.


Carbon ◽  
2021 ◽  
Vol 171 ◽  
pp. 211-220 ◽  
Author(s):  
Xueqing Xu ◽  
Feitian Ran ◽  
Zhimin Fan ◽  
Zhongjun Cheng ◽  
Tong Lv ◽  
...  

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