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However, facile regulation of RTP color remains a great challenge. Here an \u201cinorganic building unit (IBU) isomerization engineering\u201d strategy is proposed to facilely regulate RTP color. Four coordination polymers (CPs) with different packing structures from the same raw material are prepared. Among them, <jats:bold>1<\/jats:bold> has a 2D layered structure, while <jats:bold>2<\/jats:bold>, <jats:bold>3,<\/jats:bold> and <jats:bold>4<\/jats:bold> can be viewed as 3D framework isomers, which display a wide\u2010range of RTP colors (505\u2010612\u00a0nm) ranging from cyan to red, and the optimal RTP excitation wavelengths for <jats:bold>3<\/jats:bold> and <jats:bold>4<\/jats:bold> are both located within the visible light region. Detailed investigation reveals that the IBU isomerization effectively regulates the interaction between organic linkers, leading to different charge transfer (CT) processes and inducing various RTP emission. Additionally, color\u2010tunable doped RTP materials with calcium formate as matrix and in\u2010situ formed <jats:bold>4<\/jats:bold> as guest components are prepared, exhibiting interesting excitation\/ concentration\/ time\u2010dependent RTP emission. Finally, the potential application of the materials in multi\u2010level information encryption is demonstrated. This study not only proposes an effective method for regulating RTP color, but also highlights the great potential of CP\u2010type guest components in preparing doped RTP materials.<\/jats:p>","DOI":"10.1002\/smll.202408603","type":"journal-article","created":{"date-parts":[[2024,12,30]],"date-time":"2024-12-30T04:02:31Z","timestamp":1735531351000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Inorganic Building Unit Isomerization Engineering for Multicolor Room Temperature Phosphorescence"],"prefix":"10.1002","volume":"21","author":[{"given":"Wen\u2010Tao","family":"Song","sequence":"first","affiliation":[{"name":"School of Chemistry Dalian University of Technology  Dalian 116024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo\u2010Lun","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering Dalian University of Technology  Dalian 116024 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