Zhou Weixiang, Fei Yiyang, Zhang Yu-Shuang, Miao Xiaohe, Jiang Shang-Da, Liu Junzhi
Department of Chemistry, HKU-CAS Joint Laboratory on New Materials and Shanghai-Hong Kong Joint Laboratory on Chemical Synthesis, The University of Hong Kong, Hong Kong, China.
Spin-X Institute, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China.
Nat Commun. 2025 Jan 24;16(1):1006. doi: 10.1038/s41467-024-54276-0.
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 (t) as long as 101 days. Moreover, considering the spin relaxation of compound 1, with a spin-lattice relaxation time (T) of 53.55 ms and a coherence time (T) of 3.41 μs at 10 K, the compound 1 shows great promise for applications in spin-based information retention and quantum computing.
高自旋碳基多自由基在量子信息存储和传感应用中展现出巨大潜力；然而，其实际应用受到结构多样性有限和化学不稳定性的阻碍。在此，我们报道了一种直接的合成与分离方法，用于合成具有三重基态的非交替纳米石墨烯（1）。超越用于高自旋有机分子的经典间二甲苯骨架，引入七 - 五 - 七（7 - 5 - 7）元环以创建具有长达101天半衰期（t）的稳定高自旋双自由基。此外，考虑到化合物1的自旋弛豫，在10 K时其自旋 - 晶格弛豫时间（T1）为53.55 ms，相干时间（T2）为3.41 μs，化合物1在基于自旋的信息保留和量子计算应用中显示出巨大潜力。
