Biphenylene network: A nonbenzenoid carbon allotrope

Qitang Fan, Linghao Yan, Matthias R. Trip, Ondrej Krejci, Stavrina Dimosthenous, Stefan R. Kachel, Mengyi Chen, Adam Foster, Peter Liljeroth, J. Michael Gottfried

Research output: Contribution to journalArticleScientificpeer-review

380 Citations (Scopus)
1100 Downloads (Pure)


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.
Original languageEnglish
Pages (from-to)852-856
Number of pages44
Issue number6544
Publication statusPublished - 21 May 2021
MoE publication typeA1 Journal article-refereed


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