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Herein, we propose a post\u2010salting\u2010out polymerization strategy to significantly enrich the dynamic crosslinking network for the compact confinement of HOF\u2010protected luminogens, leading to remarkable RTP and especially ultralong HTP of hydrogels. Such dynamic hydrogen bonds\u2010assisted crystallization enhancement synergizes with the orderly HOF structure to significantly restrict molecular vibrations around luminogens and isolate water\/oxygen. Consequently, unprecedented RTP lifetime (\u223c3.3 s) and afterglow (\u223c45 s) are achieved in hydrogels for the first time. Owing to the good thermo\u2010stability of HOF and crystallization structures, their HTP lifetime and afterglow are still found to be above 1.3 s and 30 s, even at 100\u00b0C, despite the fact that the hydrogen bonds between polymers and HOF rosettes are sensitive to high temperature. Multicolor RTP and HTP performances are further demonstrated by either varying the luminogens or doping commercial dyes into the hydrogel matrix. This study opens new avenues for ultralong HTP hydrogels to broaden their applications.<\/jats:p>","DOI":"10.1002\/adma.73400","type":"journal-article","created":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T06:02:16Z","timestamp":1778911336000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Post\u2010Salting\u2010Out Polymerization Enriching Dynamic Crosslinks for Ultralong High\u2010Temperature Phosphorescence Hydrogels"],"prefix":"10.1002","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-9312-2061","authenticated-orcid":false,"given":"Weihao","family":"Feng","sequence":"first","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials Zhejiang Key Laboratory of Extreme\u2010environmental Material Surfaces and Interfaces Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo  Ningbo China"},{"name":"School of Chemical Sciences University 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