近日，英国牛津大学Harry L. Anderson团队提出了三链卟啉纳米带的合成。相关论文于2025年10月16日发表在《科学》杂志上。

分子纳米带是碳纳米管的一种引人入胜的类比体系。其刚性几何结构与强耦合π电子具有产生类量子环波函数的潜力。

研究组报道了由8至12个边缘融合卟啉单元构成、直径21至32埃的三链纳米带合成。通过镍介导的介观溴化卟啉耦合反应先形成单链纳米环，再经三氯化金氧化制备这些纳米带。实验核磁共振氢谱数据与计算模拟共同表明：含有90或110个π电子的奇数卟啉单元纳米带展现出全局芳香性环电流，而具有80、100或120个π电子的偶数单元纳米带则呈现全局反芳香性特征。

附：英文原文

Title: Synthesis of triple stranded porphyrin nanobelts

Author: Arnau Rodríguez-Rubio, He Zhu, Ka Man Cheung, Igor Ronevi, Lene A. Gdde, Janko Hergenhahn, Joshua L. Field, Prakhar Gupta, Wojciech Stawski, Henrik Gotfredsen, Joseph Straw, Matthew Edmondson, James N. O’Shea, Alex Saywell, Harry L. Anderson

Issue&Volume: 2025-10-16

Abstract: Molecular nanobelts are fascinating analogs of carbon nanotubes. Their rigid geometries and strongly coupled π-electrons have the potential to generate a wave function resembling that of a quantum ring. Here, we report the synthesis of triple stranded nanobelts consisting of 8 to 12 edge-fused porphyrin units with diameters of 21 to 32 angstroms. We synthesized these nanobelts by nickel-mediated coupling of meso-bromoporphyrins to form singly linked nanorings, followed by oxidation with gold(III) chloride. Experimental 1H nuclear magnetic resonance spectra, supported by computational simulations, revealed that belts containing odd numbers of porphyrins, with circuits of 90 or 110 π-electrons, display global aromatic ring currents, whereas even-numbered belts, with 80, 100, or 120 π-electrons, are globally antiaromatic.

DOI: adz8900

Source: https://www.science.org/doi/10.1126/science.adz8900