Triplet-ground-state nonalternant nanographene with high stability and long spin lifetimes
Weixiang Zhou, Yiyang Fei, Yushuang Zhang, Xiaohe Miao, Shang‐Da Jiang, Junzhi Liu
Abstract
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. While high-spin carbon-based polyradicals exhibit significant potential for applications in quantum information storage and sensing, their application is hampered by limited structural diversity and chemical instability. Here, the authors report the synthesis and isolation of a stable nonalternant nanographene with a triplet ground state.