{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T18:48:02Z","timestamp":1782326882676,"version":"3.54.5"},"reference-count":55,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"26","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11974136"],"award-info":[{"award-number":["11974136"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National Key Research and Development Program of China","award":["2024YFA1409900"],"award-info":[{"award-number":["2024YFA1409900"]}]},{"name":"Science and Technology Development Program of Jilin Province of China","award":["20250102014JC"],"award-info":[{"award-number":["20250102014JC"]}]}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,6,26]]},"abstract":"<jats:p>\n                    The nitrogen ring structure represented by the pentazolate anion (N\n                    <jats:sub>5<\/jats:sub>\n                    <jats:sup>\u2212<\/jats:sup>\n                    ) has received widespread attention due to its potential to form high\u2013energy-density materials. However, the inherent high-energy properties of nitrogen rings make obtaining their stable crystals under ambient conditions a recognized key challenge. Here, we report a stable polynitrogen crystal Li\n                    <jats:sub>4<\/jats:sub>\n                    (N\n                    <jats:sub>5<\/jats:sub>\n                    )\n                    <jats:sub>2<\/jats:sub>\n                    under ambient conditions by first-principles structural and dynamic studies. In its primitive cell, electron transfer from lithium\u00a0(Li) atoms to N\n                    <jats:sub>5<\/jats:sub>\n                    rings occupies their delocalized orbitals, forming anionic N\n                    <jats:sub>5<\/jats:sub>\n                    <jats:sup>\u2212<\/jats:sup>\n                    in a superatomic state, where Li-N\n                    <jats:sub>5<\/jats:sub>\n                    ionic interactions and N\n                    <jats:sub>5<\/jats:sub>\n                    -N\n                    <jats:sub>5<\/jats:sub>\n                    van der Waals interactions jointly maintain the structural stability. These interactions result in structure anisotropy, where the\n                    <jats:italic toggle=\"yes\">ab<\/jats:italic>\n                    -plane direction is governed by both ionic and covalent interactions, while the\n                    <jats:italic toggle=\"yes\">c<\/jats:italic>\n                    -axis direction is dominated by ionic interactions. Our findings provide an important foundation for the development of high\u2013energy-density materials based on nitrogen rings and for related artificial unit crystallization pathways.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aee5798","type":"journal-article","created":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T18:00:04Z","timestamp":1782324004000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["A stable superatomic nitrogen ring crystal under ambient conditions"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-6206-1494","authenticated-orcid":true,"given":"Zhen","family":"Gong","sequence":"first","affiliation":[{"name":"Key Laboratory of Material Simulation Methods &amp; Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-6232-0263","authenticated-orcid":true,"given":"Baiqiang","family":"Liu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Material Simulation Methods &amp; Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-1104-2938","authenticated-orcid":true,"given":"Famin","family":"Yu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Material Simulation Methods &amp; Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China."},{"name":"School of Physics, Changchun Normal University, Changchun 130032, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8392-3971","authenticated-orcid":true,"given":"Chenxi","family":"Wan","sequence":"additional","affiliation":[{"name":"Key Laboratory of Material Simulation Methods &amp; Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China."},{"name":"Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-5962-8937","authenticated-orcid":true,"given":"Siyang","family":"Liu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Material Simulation Methods &amp; Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, 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