{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T15:59:25Z","timestamp":1790783965069,"version":"4.1.0"},"reference-count":49,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:00:00Z","timestamp":1790467200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:00:00Z","timestamp":1790467200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2023YFA1608902"],"award-info":[{"award-number":["2023YFA1608902"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Pressure provides a direct way to regulate molecular packing and excited\u2010state relaxation in organic crystals, but retaining pressure\u2010induced emission after decompression remains challenging. Here, we report pressure\u2010activated and retained blue emission in melamine (MA), a simple nitrogen\u2010rich molecular crystal assembled by N\u2013H\u00b7\u00b7\u00b7N hydrogen bonds. MA shows weak blue emission at ambient conditions, whereas compression markedly enhances its photoluminescence and pressure release produces an even brighter state, with an approximately 35\u2010fold increase in integrated emission intensity. Time\u2010resolved photoluminescence and UV\u2013vis absorption measurements indicate that the retained enhancement is not mainly governed by lifetime prolongation or optical\u2010absorption changes. In situ Raman, FTIR, and powder X\u2010ray diffraction reveal pressure\u2010induced changes in molecular and lattice vibrations, the N\u2500H\u2010related hydrogen\u2010bonding environment, and anisotropic lattice compression, together with increasing structural disorder at higher pressures and incomplete recovery after decompression. TD\u2010DFT calculations show that N\u2500H\u00b7\u00b7\u00b7N shortening slightly increases the S\n                    <jats:sub>1<\/jats:sub>\n                    oscillator strength and modifies the local hole\u2013electron distribution, qualitatively supporting the influence of hydrogen\u2010bond modulation on the excited\u2010state properties. Together, these results associate the retained emission with an incompletely recovered pressure\u2010modified intermolecular and lattice environment, highlighting hydrogen\u2010bonded molecular crystals for pressure\u2010activated and retained luminescence.\n                  <\/jats:p>","DOI":"10.1002\/advs.77871","type":"journal-article","created":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T18:00:31Z","timestamp":1790532031000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Pressure\u2010Activated and Retained Blue Emission in Melamine Through Hydrogen\u2010Bond and Packing Regulation"],"prefix":"10.1002","author":[{"given":"Siyao","family":"Wang","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering Jilin University  Changchun China"},{"name":"High Energy Photon Source, Institute of High Energy Physics Chinese Academy of Sciences  Beijing 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