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<p>High-spin carbon-based polyradicals exhibit significant potential for applications in quantum information storage and sensing; however, their practical application is hampered by limited structural diversity and chemical instability. Here, we report a straightforward synthetic and isolation method for synthesizing a nonalternant nanographene (<b>1</b>) with a triplet ground state. Moving beyond the classic <i>m</i>-xylylene scaffold for high-spin organic molecules, seven-five-seven (7–5–7)-membered rings are introduced to create stable high-spin diradicals with half-lives (<i>t</i><sub>1/2</sub>) as long as 101 days. Moreover, considering the spin relaxation of compound <b>1</b>, with a spin–lattice relaxation time (<i>T</i><sub>1</sub>) of 53.55 ms and a coherence time (<i>T</i><sub>m</sub>) of 3.41 μs at 10 K, the compound <b>1</b> shows great promise for applications in spin-based information retention and quantum computing.</p>

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Triplet-ground-state nonalternant nanographene with high stability and long spin lifetimes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月24日

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  • Weixiang Zhou,
  • Yiyang Fei,
  • Yu-Shuang Zhang,
  • Xiaohe Miao,
  • Shang-Da Jiang,
  • Junzhi Liu

摘要

High-spin carbon-based polyradicals exhibit significant potential for applications in quantum information storage and sensing; however, their practical application is hampered by limited structural diversity and chemical instability. Here, we report a straightforward synthetic and isolation method for synthesizing a nonalternant nanographene (1) with a triplet ground state. Moving beyond the classic m-xylylene scaffold for high-spin organic molecules, seven-five-seven (7–5–7)-membered rings are introduced to create stable high-spin diradicals with half-lives (t1/2) as long as 101 days. Moreover, considering the spin relaxation of compound 1, with a spin–lattice relaxation time (T1) of 53.55 ms and a coherence time (Tm) of 3.41 μs at 10 K, the compound 1 shows great promise for applications in spin-based information retention and quantum computing.