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Updated: Jan 8, 2026

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

シクロ[10]カーボンからシクロ[20]カーボンおよびシクロ[30] カーボンへの表面合成

Yuan Guo¹, Yuzhe Yun¹, Wenzhi Xiang¹

¹Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, People's Republic of China.

Nature communications

|December 13, 2025

Abstract:

On-surface synthesis recently enabled access to generate a series of cyclo[n]carbons (C_n, up to C₂₆) via delicately designed precursors. However, for larger cyclocarbons, synthesis of the corresponding precursors is being challenged. Here, we report another strategy for synthesizing larger cyclocarbons via the coupling and ring-opening reactions from smaller ones. We chose C₁₀ as the precursor, and induce the coupling and ring-opening reactions via tip manipulation to successfully generate C₂₀ and C₃₀. Bond-resolved atomic force microscopy imaging unambiguously reveals the polyynic structure of C₃₀, aligning with theoretical prediction. This approach establishes a new pathway to access larger cyclocarbons, and potentially enables controlled polymerization of cyclocarbons.

キーワード:

炭素環表面合成分子カップリング開環反応走査型トンネル顕微鏡原子間力顕微鏡

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Solid-phase Synthesis of [4.4] Spirocyclic Oximes

Solid-phase Synthesis of [4.4] Spirocyclic Oximes

Published on: February 6, 2019

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

Published on: February 7, 2019

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Robinson annulation is a base-catalyzed reaction for the synthesis of 2-cyclohexenone derivatives from 1,3-dicarbonyl donors (such as cyclic diketones, β-ketoesters, or β-diketones) and α,β-unsaturated carbonyl acceptors. Named after Sir Robert Robinson, who discovered it, this reaction yields a six-membered ring with three new C–C bonds (two σ bonds and one π bond).

Cycloalkanes

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