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To address this demand, a series of highly phosphorescent Pt(II) complexes (emission quantum yield of up to 74.5%) have been synthesized through the conjugated incorporation of a chiral estrone fragment into a 2\u2010phenylpyridine ligand. This functional estrone fragment likely guides the packing arrangement, enabling the complex molecules to self\u2010assemble into dimer\u2010like arrangement and form a porous, layered micro\u2010nanostructure, as supported by XRD and DFT calculations. This architecture, with its large specific surface area and numerous pores, facilitates mechanochromic and vapochromic switching. The\n                    <jats:bold>Pt1<\/jats:bold>\n                    film exhibits high\u2010specificity recognition toward acetone. Upon exposure to acetone vapor, it shows a fast and obvious luminescence color change (red to green) with a response time of less than 0.5 s. Solvent spray technology has been utilized for high\u2010security and multilevel\u2010code anti\u2010counterfeiting applications with a recovery time of 3.0 s. This approach achieves rich irreversible and reversible changes, rapid switching speeds, high specificity to acetone, and excellent repeatability. Furthermore, the inherent relationships between molecular structures and functions have been thoroughly examined, offering a promising strategy for designing multiple\u2010stimuli\u2010responsive switching materials.\n                  <\/jats:p>","DOI":"10.1002\/asia.70798","type":"journal-article","created":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T14:22:42Z","timestamp":1779114162000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fast and Specific Mechano\u2010 and Vapochromic Switching in Phosphorescent Estrone\u2010Based Pt(II) Complexes"],"prefix":"10.1002","volume":"21","author":[{"given":"Bo","family":"Tu","sequence":"first","affiliation":[{"name":"College of Chemistry Sichuan University  Chengdu P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bao","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Chemistry Sichuan University  Chengdu P. R. 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