文献类型：期刊文献

英文题名：Collective Quantum Magnetism in Nitrogen-Doped Nanographenes

作者：Zhu, Gucheng[1];Jiang, Yashi[1];Wang, Ying[2];Wang, Bing-Xin[2];Zheng, Yuqiang[1];Liu, Yufeng[1];Kang, Li-Xia[2];Li, Zhanbo[3];Guan, Dandan[1,4,5];Li, Yaoyi[1,4,5];Zheng, Hao[1,4,5];Liu, Canhua[1,4,5];Jia, Jinfeng[1,4,5];Lin, Tao[3];Liu, Pei-Nian[2];Li, Deng-Yuan[2];Wang, Shiyong[1,5]

机构：[1]Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Artificial Struct & Quantum Control, Minist Educ,Shenyang Natl Lab Mat Sci, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Key Lab Adv Mat Feringa Nobel Prize Scientist Join, Shanghai 200237, Peoples R China;[3]Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China;[4]Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China;[5]Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China

年份：2023

卷号：145

期号：13

起止页码：7136

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20231413828429);WOS:【SCI-EXPANDED(收录号:WOS:000959504200001)】；

基金：S.W. acknowledges the financial support from the National Key R&D Program of China (No. 2020YFA0309000) , the National Natural Science Foundation of China (No. 11874258, No. 12074247) , the Shanghai Municipal Science and Technology Qi Ming Xing Project (No. 20QA1405100) , Fok Ying Tung Foundation for young researchers, YangYang Foundation, and SJTU (No. 21X010200846) . D.-Y.L. acknowledges the financial support from the National Natural Science Foundation of China (No. 22272050) and the Shanghai Municipal Science and Technology Qi Ming Xing Project (No. 22QA1403000) . This work was also supported by the Ministry of Science and Technology of China (Grant Nos. 2019YFA0308600, 2016YFA0301003, and 2016YFA0300403) , NSFC (Grant Nos. 21925201, 22161160319, 11521404, 11634009, 92065201, 11874256, 11790313, and 11861161003) , the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000) , and the Science and Technology Commission of Shanghai Municipality (Grant Nos. 20ZR1414200, 2019SHZDZX01, 19JC1412701, and 20QA1405100) .

语种：英文

外文关键词：Dehydrogenation - Density functional theory - Doping (additives) - Nitrogen - Quantum optics - Scanning probe microscopy

摘要：The emergence of quantum magnetism in nano-graphenes provides ample opportunities to fabricate purely organic devices for spintronics and quantum information. Although heteroatom doping is a viable way to engineer the electronic properties of nanographenes, the synthesis of doped nano-graphenes with collective quantum magnetism remains elusive. Here, a set of nitrogen-doped nanographenes (N-NGs) with atomic precision are fabricated on Au(111) through a combination of imidazole [2+2+2]-cyclotrimerization and cyclodehydrogena-tion reactions. High-resolution scanning probe microscopy measurements reveal the presence of collective quantum magnet-ism for nanographenes with three radicals, with spectroscopic features which cannot be captured by mean-field density functional theory calculations but can be well reproduced by Heisenberg spin model calculations. In addition, the mechanism of magnetic exchange interaction of N-NGs has been revealed and compared with their counterparts with pure hydrocarbons. Our findings demonstrate the bottom-up synthesis of atomically precise N-NGs which can be utilized to fabricate low-dimensional extended graphene nanostructures for realizing ordered quantum phases.