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Adv."],"published-print":{"date-parts":[[2026,7,17]]},"abstract":"<jats:p>\n                    The controllable storage and efficient application of hydrazine (N\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    ), a vital yet hazardous chemical, remains a continuous challenge. Herein, we report a series of polynitro frameworks (PNFs), PNF-4, PNF-5, and PNF-6, that achieve molecularly precise and programmable encapsulation of four, five, and six N\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    molecules per unit cell, respectively. This precise loading is facilitated by a structural reconfiguration of the host framework, which immobilizes guest molecules via extensive hydrogen bonds\u2014up to 36 pairs in PNF-6. Consequently, the confined neutral N\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    exhibits record-high thermal stability, with decomposition initiating at 201\u00b0C. Furthermore, the integration of fuel (N\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    ) and oxidizer (nitro groups) creates a superior self-redox system, which enhances the propulsion performance of formulation containing PNF-6. This work provides an effective strategy for the precise, safe, and high-energy storage of N\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    for advanced aerospace applications while also offering previously unidentified insights for integrating reactive, small molecules into adaptive frameworks for multifunctional systems.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aee8120","type":"journal-article","created":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T18:01:57Z","timestamp":1784138517000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Programmatic encapsulation of hydrazine within polynitro frameworks for superior self-redox systems"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-9896-8715","authenticated-orcid":true,"given":"Xudong","family":"Xu","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2567-8788","authenticated-orcid":true,"given":"Qi","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3689-0696","authenticated-orcid":true,"given":"Ning","family":"Ding","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-8651-7765","authenticated-orcid":true,"given":"Zihao","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-3459-0461","authenticated-orcid":true,"given":"Aoxue","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xudong","family":"Li","sequence":"additional","affiliation":[{"name":"The Second Hospital of Jilin University, Changchun 130041, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoting","family":"Ren","sequence":"additional","affiliation":[{"name":"Department of Synthesis, Hubei Institute of Aerospace chemical Technology, Xiangyang 441002, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinxuan","family":"He","sequence":"additional","affiliation":[{"name":"Department of Synthesis, Hubei Institute of Aerospace chemical Technology, Xiangyang 441002, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9144-2167","authenticated-orcid":true,"given":"Shenghua","family":"Li","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1047-4317","authenticated-orcid":true,"given":"Siping","family":"Pang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, 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