Biphenylene network: A nonbenzenoid carbon allotrope.

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Bibliographic Details
Title:	Biphenylene network: A nonbenzenoid carbon allotrope.
Authors:	Fan, Qitang, Yan, Linghao, Tripp, Matthias W., Krejcí, Ondrej, Dimosthenous, Stavrina, Kachel, Stefan R., Chen, Mengyi, Foster, Adam S., Koert, Ulrich, Liljeroth, Peter, Gottfried, J. Michael
Source:	Science (pre-March 2025). 5/21/2021, Vol. 372 Issue 6544, p852-856. 5p. 4 Diagrams.
Subjects:	Biphenylene, Carbon, Allotropy, Synthesis of Nanocomposite materials, Atoms
Abstract:	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. [ABSTRACT FROM AUTHOR]
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Database:	Psychology and Behavioral Sciences Collection

Description
Abstract:	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. [ABSTRACT FROM AUTHOR]
ISSN:	00368075
DOI:	10.1126/science.abg4509